{"id":5976,"date":"2020-10-22T15:50:58","date_gmt":"2020-10-22T15:50:58","guid":{"rendered":"http:\/\/rogerbit.com\/wprb\/?p=5976"},"modified":"2020-10-22T15:50:58","modified_gmt":"2020-10-22T15:50:58","slug":"rhythmic-audio-meter-with-lm3915-bar-point-mode","status":"publish","type":"post","link":"https:\/\/rogerbit.com\/wprb\/2020\/10\/rhythmic-audio-meter-with-lm3915-bar-point-mode\/","title":{"rendered":"Rhythmic Audio Meter with LM3915 (Bar\/Point Mode)"},"content":{"rendered":"

<\/iframe><\/p>\n<p>In this tutorial we will see how to make a rhythmic audio meter with the lm3915 integrated circuit. We will look at the list of electronic materials and components, also the assembly of the board step by step and talk about some features of the lm3915 integrated circuit.<\/p>\n<p><strong>Field of application<\/strong><\/p>\n<p>This integrated is used in the measurement of audio power levels, because the human ear has a logarithmic response to the level. In this way, the ignition of each LED will have a direct relationship with the sensation of the sound level. This built-in is application for audio uses as a rhythmic audio meter.<\/p>\n<hr \/>\n<p style=\"text-align: left;\">Tal vez pueda interesarte proyectos en arduino, pic, rob\u00f3tica, telecomunicaciones, suscribete en\u00a0<a href=\"http:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1\">http:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1<\/a>\u00a0mucho videos con c\u00f3digo fuentes completos y diagramas<\/p>\n<p style=\"text-align: left;\"><div id=\"ubm-banners-rotation-n1\" data-interval=\"4000\" class=\"ubm_banners_rotation\" style=\"overflow: hidden; width: 200px; height: 150px;\"><div id=\"3_ubm_banner\" class=\"ubm_rotating_banner\"><a href=\"https:\/\/bit.ly\/3aXRDAu\" target=\"_blank\" rel=\"dofollow\"><img src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/useful_banner_manager_banners\/3-2-logo youtube.png\" width=\"100%\" height=\"100%\" alt=\"SUSCRIBETE A NUESTRO CANAL DE YOUTUBE, TUTORIALES GRATIS\" \/><\/a><\/div><\/div><\/p>\n<hr \/>\n<p><strong>LM3915: Dot\/Bar Display Controller<\/strong><\/p>\n<p><strong>Overview<\/strong><\/p>\n<p>The LM3915 is a monolithic integrated circuit that detects analog voltage levels and activates ten LEDs, LCDs or vacuum fluorescent displays, which provide a 3 dB\/step logarithmic analog sample. A pin changes the screen of a bar chart to a moving point screen. The LED current unit is programmable and adjustable, eliminating the need for current limiting resistors. The entire display system can operate from a single supply as low as 3V or as high as 25V.<\/p>\n<p>The IC contains an adjustable voltage reference and a precise ten-step voltage divider. The high impedance input in the buffer accepts ground signals and up to 1.5 V of the positive offer. In addition, it does not need protection against \u00b1 35V inputs. The input buffer drives 10 individual comparators referenced to the precision divider. Accuracy is usually better than 1 dB.<br \/>\nThe LM3915’s 3 dB\/step display is suitable for signals with wide dynamic range, such as audio level, power, light intensity or vibration. Audio applications include average or peak level indicators, power meters and RF signal power meters. Replacement of conventional meters with an LED bar.<br \/>\nThe graph results in a faster, stronger response display with high visibility that preserves the ease of interpretation of an analog display.<br \/>\nThe LM3915 is extremely easy to apply. A full 1.2V<\/p>\n<p>scale The meter requires only one resistor in addition to the ten LEDs.<br \/>\nA more program resistance<\/p>\n<p>the full scale from 1.2V to 12V regardless of the supply voltage. LED brightness is easily controlled with a single pot.<\/p>\n<p><strong>Features<\/strong><\/p>\n<ul>\n<li>Handles up to 10 individual LEDs or displays to LEDs, LCDs, fluorescents or low-current incandescent lamps<\/li>\n<li>Expandable to displays up to 100 steps<\/li>\n<li>Bar mode display (all LEDs back on) or dot mode (single LED on)<\/li>\n<li>10-step floating-point intercom divider that can be referenced over a wide range of voltages<\/li>\n<li>Internal voltage reference from 1.2 V to 12 V<\/li>\n<li>Regulated current and open collector outputs<\/li>\n<li>Outputs can be connected to TTL or CMOS<\/li>\n<li>Programmable output current from 2 mA to 30 mA, eliminating the need for resistors<\/li>\n<li>The inputs support up \u00b135 V without damage or falsely activating an output<\/li>\n<li>Dissipation max. encapsulation: 1365 mW<\/li>\n<li>Supply voltage: 3 V to 25 V<\/li>\n<li>Encapsulated: DIP 18-pin<\/li>\n<\/ul>\n<p>The internal 10-step divider is floating and can<\/p>\n<p>refer to a wide range of voltages The LM3915 is rated to operate from 0oC to +70oC. The LM3915N-1 is available in an 18-lead molded DIP package.<\/p>\n<p><strong>FUNCTIONAL DESCRIPTION<\/strong><\/p>\n<p>The LM3915’s simplified block diagram is included to give an overview of circuit operation. A large<\/p>\n<p>input The impedance buffer operates with ground signals at 12V<\/p>\n<p>and is protected against reverse and overvoltage signals. The signal is then applied to a series of 10 comparators; each of which is mewed<\/p>\n<p>to a different level of comparison by the resistance chain.<br \/>\nIn the illustrated example, the resistor chain is connected to the internal reference voltage of 1.25 V. In this case, for<\/p>\n<p>every 3 dB that increases the input signal, one comparator will turn on another LED indicator. This<\/p>\n<p>resistor The divider can be connected between any 2 voltages, provided they<\/p>\n<p>are at least 1.5 V below V+ and not less than V-.<\/p>\n<p>Voltage required at the input to turn on each LED<\/p>\n<table border=\"2\" width=\"306\" cellspacing=\"2\" cellpadding=\"3\">\n<tbody>\n<tr>\n<th align=\"center\" width=\"100\">Led<\/th>\n<th align=\"center\" width=\"100\">LM3914<\/th>\n<th align=\"center\" width=\"100\">LM3915<\/th>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">1<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">125mV<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">60mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">2<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">250mV<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">80mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">3<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">375mV<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">110mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">4<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">500mV<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">160mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">5<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">625mV<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">220mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">6<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">750mV<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">320mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">7<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">875mV<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">440mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">8<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">1v<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">630mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">9<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">1,125V<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">890mV<\/td>\n<\/tr>\n<tr>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">10<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">1.25V<\/td>\n<td class=\"row\" align=\"center\" valign=\"middle\" width=\"96\">1.25V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Pinout<\/strong><\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/LM3915-display-Driver-Pinout.png\"><img loading=\"lazy\" class=\"alignnone wp-image-5819\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/LM3915-display-Driver-Pinout.png\" sizes=\"(max-width: 387px) 100vw, 387px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/LM3915-display-Driver-Pinout.png 626w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/LM3915-display-Driver-Pinout-300x270.png 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/LM3915-display-Driver-Pinout-600x541.png 600w\" alt=\"\" width=\"387\" height=\"349\" \/><\/a><\/p>\n<p><strong>Block diagram<\/strong><\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques.png\"><img loading=\"lazy\" class=\"alignnone wp-image-5806\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques-637x1024.png\" sizes=\"(max-width: 457px) 100vw, 457px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques-637x1024.png 637w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques-187x300.png 187w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques-768x1235.png 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques-600x965.png 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques-820x1318.png 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques-1320x2122.png 1320w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/bloques.png 1534w\" alt=\"\" width=\"457\" height=\"735\" \/><\/a><\/p>\n<h3><strong>Cascading connection.<\/strong><\/h3>\n<p>We can connect both cascading integrated circuits (two LM3915). This connection refers to adding the integrated circuits, to scale up twice or even more.<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/cascada.png\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-5821\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/cascada-1024x313.png\" sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/cascada-1024x313.png 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/cascada-300x92.png 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/cascada-768x235.png 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/cascada-600x183.png 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/cascada-820x251.png 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/cascada-1320x404.png 1320w\" alt=\"\" width=\"1024\" height=\"313\" \/><\/a><\/p>\n<p> <\/p>\n<p><strong>Circuit<\/strong><\/p>\n<p> <\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/circuito.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5803\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/circuito-1024x1004.jpg\" sizes=\"(max-width: 630px) 100vw, 630px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/circuito-1024x1004.jpg 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/circuito-300x294.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/circuito-768x753.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/circuito-600x588.jpg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/circuito-820x804.jpg 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/circuito-1320x1295.jpg 1320w\" alt=\"\" width=\"630\" height=\"618\" \/><\/a><\/p>\n<p><strong>Electronic diagram<\/strong><\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/diagrama-electr%C3%B3nico.png\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-5826\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/diagrama-electr%C3%B3nico-1024x942.png\" sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/diagrama-electr\u00f3nico-1024x942.png 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/diagrama-electr\u00f3nico-300x276.png 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/diagrama-electr\u00f3nico-768x707.png 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/diagrama-electr\u00f3nico-600x552.png 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/diagrama-electr\u00f3nico-820x754.png 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/diagrama-electr\u00f3nico-1320x1214.png 1320w\" alt=\"\" width=\"1024\" height=\"942\" \/><\/a><\/p>\n<p><strong>Materials<\/strong><\/p>\n<p>A 1K resistor<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1k.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5807\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1k.jpg\" sizes=\"(max-width: 199px) 100vw, 199px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1k.jpg 800w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1k-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1k-300x300.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1k-768x768.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1k-600x600.jpg 600w\" alt=\"\" width=\"199\" height=\"199\" \/><\/a><\/p>\n<p>Two diode 1N007<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1N4007.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5808\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1N4007.jpg\" sizes=\"(max-width: 188px) 100vw, 188px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1N4007.jpg 608w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1N4007-300x296.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1N4007-600x592.jpg 600w\" alt=\"\" width=\"188\" height=\"186\" \/><\/a><\/p>\n<p>A 1uF capacitor<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1uf.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5809\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1uf.jpg\" sizes=\"(max-width: 187px) 100vw, 187px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1uf.jpg 640w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1uf-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1uf-300x300.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/1uf-600x600.jpg 600w\" alt=\"\" width=\"187\" height=\"187\" \/><\/a><\/p>\n<p>Un resistor de 100K<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/100k.jpg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-5811\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/100k.jpg\" sizes=\"(max-width: 224px) 100vw, 224px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/100k.jpg 224w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/100k-150x150.jpg 150w\" alt=\"\" width=\"224\" height=\"224\" \/><\/a><\/p>\n<p>A jumper<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/jumper.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5812\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/jumper.jpg\" sizes=\"(max-width: 242px) 100vw, 242px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/jumper.jpg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/jumper-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/jumper-300x300.jpg 300w\" alt=\"\" width=\"242\" height=\"242\" \/><\/a><\/p>\n<p>Ten LED diode of different colors<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/leds.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5813\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/leds.jpg\" sizes=\"(max-width: 262px) 100vw, 262px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/leds.jpg 800w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/leds-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/leds-300x300.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/leds-768x768.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/leds-600x600.jpg 600w\" alt=\"\" width=\"262\" height=\"262\" \/><\/a><\/p>\n<p>An LM3915 integrated circuit<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/lm3915.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5814\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/lm3915.jpg\" sizes=\"(max-width: 275px) 100vw, 275px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/lm3915.jpg 512w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/lm3915-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/lm3915-300x300.jpg 300w\" alt=\"\" width=\"275\" height=\"275\" \/><\/a><\/p>\n<p>A printed circuit<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pcb-1.png\"><img loading=\"lazy\" class=\"alignnone wp-image-5815\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pcb-1-1024x561.png\" sizes=\"(max-width: 426px) 100vw, 426px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pcb-1-1024x561.png 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pcb-1-300x164.png 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pcb-1-768x421.png 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pcb-1-600x329.png 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pcb-1-820x449.png 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pcb-1-1320x724.png 1320w\" alt=\"\" width=\"426\" height=\"233\" \/><\/a><\/p>\n<p>Download Gerber File \u2013>\u00a0<a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/V%C3%9AMETRO_CON_LM3915.zip\">V\u00daMETRO_CON_LM3915<\/a><\/p>\n<p>Male pins<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1.jpeg\"><img loading=\"lazy\" class=\"alignnone wp-image-5816\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1-1024x1024.jpeg\" sizes=\"(max-width: 315px) 100vw, 315px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1-1024x1024.jpeg 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1-150x150.jpeg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1-300x300.jpeg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1-768x768.jpeg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1-600x600.jpeg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1-820x820.jpeg 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/pines-1.jpeg 1200w\" alt=\"\" width=\"315\" height=\"315\" \/><\/a><\/p>\n<p>18-pin socket<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/zocalo18.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5817\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/zocalo18.jpg\" sizes=\"(max-width: 281px) 100vw, 281px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/zocalo18.jpg 800w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/zocalo18-300x225.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/zocalo18-768x576.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/zocalo18-600x450.jpg 600w\" alt=\"\" width=\"281\" height=\"211\" \/><\/a><\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/IMG_20200821_182451693.jpg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-5829\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/IMG_20200821_182451693-1024x768.jpg\" sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/IMG_20200821_182451693-1024x768.jpg 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/IMG_20200821_182451693-300x225.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/IMG_20200821_182451693-768x576.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/IMG_20200821_182451693-600x450.jpg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/IMG_20200821_182451693-820x615.jpg 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/08\/IMG_20200821_182451693-1320x990.jpg 1320w\" alt=\"\" width=\"1024\" height=\"768\" \/><\/a><\/p>\n<hr \/>\n<p>\u2b50\ufe0f<span>\u00a0SUBSCRIBE:<a href=\"https:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1\"> https:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1<\/a>\u00a0<a href=\"https:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1\">(Don’t<\/a>\u00a0forget to activate the\u00a0<\/span>\ud83d\udd14)<\/p>\n<p>\ud83d\udc49<span>Secondary channel:\u00a0<a href=\"https:\/\/www.youtube.com\/channel\/UCjES9aB4g1F3IQbAk2nWCZg\">https:\/\/www.youtube.com\/channel\/UCjES9aB4g1F3IQbAk2nWCZg<\/a><\/span><\/p>\n<p>\ud83d\udc49<span>Instagram:\u00a0<a href=\"https:\/\/www.instagram.com\/carlosvolt_electronic_robotic\/\">https:\/\/www.instagram.com\/carlosvolt_tutoriales\/<\/a><\/span><\/p>\n<p>\ud83d\udc49<span>Tik Tok:\u00a0<a href=\"https:\/\/www.tiktok.com\/@carlosvolt\">https:\/\/www.tiktok.com\/@carlosvolt<\/a><\/span><\/p>\n<p>\ud83d\udc49<span>Fanpage:\u00a0<a href=\"https:\/\/www.facebook.com\/rogerbitfanpage\/\">https:\/\/www.facebook.com\/rogerbitfanpage\/<\/a><\/span><\/p>\n<p>\ud83d\udc49<span>Facebook:\u00a0<a href=\"https:\/\/www.facebook.com\/groups\/RogerBit\">https:\/\/www.facebook.com\/groups\/RogerBit<\/a><\/span><\/p>\n<p>\ud83d\udc49<span>Twitter:\u00a0<a href=\"https:\/\/twitter.com\/rogerbit_\">https:\/\/twitter.com\/rogerbit_<\/a><\/span><\/p>\n<p>\ud83d\udc49<span>Donations by paypal\u00a0<a href=\"https:\/\/goo.gl\/824Dnm\">https:\/\/goo.gl\/824Dnm<\/a>\u00a0or\u00a0<a href=\"mailto:donacion@rogerbit.com\">donacion@rogerbit.com<\/a><\/span><\/p>\n<p>\ud83d\udc49<span>Website:\u00a0<a href=\"https:\/\/www.rogerbit.com\/\">https:\/\/www.rogerbit.com<\/a><\/span><\/p>\n<hr \/>\n<p>SUBSCRIBE TO OUR NEWSLETTERS, RECEIVE IN YOUR EMAIL THE MOST OUTSTANDING NEWS, JUST BY ENTERING YOUR EMAIL<\/p>\n<p style=\"text-align: left;\">[wysija_form id=”1″]<\/p>\n<hr \/>\n<p style=\"text-align: left;\"><div class=\"page-sidebar widget\" id=\"donation_buttons\"><form action=\"https:\/\/www.paypal.com\/cgi-bin\/webscr\" method=\"post\" target=\"_blank\" ><input type=\"hidden\" name=\"business\" value=\"donacion@rogerbit.com\"><input type=\"hidden\" name=\"bn\" value=\"mbjtechnolabs_SP\"><input type=\"hidden\" name=\"cmd\" value=\"_donations\"><input type=\"hidden\" name=\"item_name\" value=\"Ayuda a RogerBit.com\"><input type=\"hidden\" name=\"item_number\" value=\"www.rogerbit.com\"><input type=\"hidden\" class=\"set_donation_button_amount\" name=\"amount\" value=\"1\"><table ><tbody><tr><td><label for=\"rogerBit necesita de tu ayuda para seguir existiendo :-)\">rogerBit necesita de tu ayuda para seguir existiendo :-)<\/label><\/td><\/tr><\/tbody><\/table><table ><tbody><tr><td><input style=\"margin-top:10px;\" type=\"image\" name=\"submit\" border=\"0\" src=\"https:\/\/www.paypal.com\/en_US\/i\/btn\/btn_donateCC_LG.gif\" alt=\"PayPal - The safer, easier way to pay online\"><\/td><\/tr><\/tbody><\/table><input type=\"hidden\" name=\"currency_code\" value=\"USD\"><input type=\"hidden\" name=\"notify_url\" value=\"https:\/\/rogerbit.com\/wprb\/?Donation_Button&action=ipn_handler\"><\/form><\/div><\/p>\n<p><strong>RECOMMENDED VIDEO<\/strong><\/p>\n<p><iframe loading=\"lazy\" width=\"1160\" height=\"653\" src=\"https:\/\/www.youtube.com\/embed\/0n05Gci34LI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial we will see how to make a rhythmic audio meter with the lm3915 integrated circuit. We will look at the list of electronic materials and components, also the assembly of the board step by step and talk about some features of the lm3915 integrated circuit. Field of application This integrated is used […]<\/p>\n","protected":false},"author":1,"featured_media":5828,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[648],"tags":[951,950,954,953,949,613,917,948,952],"_links":{"self":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/5976"}],"collection":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/comments?post=5976"}],"version-history":[{"count":2,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/5976\/revisions"}],"predecessor-version":[{"id":5978,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/5976\/revisions\/5978"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/media\/5828"}],"wp:attachment":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/media?parent=5976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/categories?post=5976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/tags?post=5976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}