{"id":6074,"date":"2020-11-27T23:57:48","date_gmt":"2020-11-27T23:57:48","guid":{"rendered":"http:\/\/rogerbit.com\/wprb\/?p=6074"},"modified":"2021-01-13T16:24:06","modified_gmt":"2021-01-13T16:24:06","slug":"alcoholimeter-with-mq3-sensor-and-arduino-nano-includes-printed-circuit","status":"publish","type":"post","link":"https:\/\/rogerbit.com\/wprb\/2020\/11\/alcoholimeter-with-mq3-sensor-and-arduino-nano-includes-printed-circuit\/","title":{"rendered":"Alcoholimeter with MQ3 sensor and arduino nano (Includes printed circuit)"},"content":{"rendered":"

<\/iframe><\/p>\n<p>In this tutorial we will see how to make a breathalyzer, simple economical and easy to make. We’ll see the source code, the circuit assembly all step by step. The printed circuit board will be available for free.<\/p>\n<p><strong>What is a breathalyzer?<\/strong><\/p>\n<p>It is a device to measure the amount of alcohol present in the air breathed by a person, it can also measure the amount of alcohol contained in a liquid or gas.<\/p>\n<p><strong>MQ3 module<\/strong><\/p>\n<p>This alcohol sensor is suitable for detecting the concentration of alcohol in your breath, just like a commercial breathalyzer. It has a high sensitivity and fast response time. The sensor features a resistive analog output based on alcohol concentration.<\/p>\n<p><strong>Some comments from the MQ3 sensor<\/strong><\/p>\n<p>This sensor has 4 pins two of which are power, one is an analog output (PIN AD) and the other a digital output (PIN DO), it is finally possible to regulate its sensitivity, by means of a potentiometer that owns the board, they will notice that when you turn on this module and connect a LED it is turned on, since this output is reversed or denied (NOT). This means that in the presence of alcohol in the sensor the LED will be on and if it exceeds the set threshold with the potentiometer it will turn off. This is very useful if we do not want to use any microcontroller, nor Arduino, with this module we can only have a very simple breathalyzer just feeding the module and nothing else.<\/p>\n<p>As soon as we turn on this module, it will start to heat up, we have to wait a few minutes (about 5) for the module to heat up and we have a correct census.<\/p>\n<hr \/>\n<p>You may be interested in projects in Arduino, pic, robotics, telecommunications,\u00a0<a href=\"http:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1\">subscribe http:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1<\/a>\u00a0videos with full source code and diagrams<\/p>\n<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>\n<hr \/>\n<p>Electronic components<\/p>\n<p>An Arduino nano<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/arduino_nano.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-6058\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/arduino_nano.jpg\" sizes=\"(max-width: 249px) 100vw, 249px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/arduino_nano.jpg 425w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/arduino_nano-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/arduino_nano-300x300.jpg 300w\" alt=\"\" width=\"249\" height=\"249\" \/><\/a><\/p>\n<p>The Arduino Nano is a small board, complete and compatible with the test board based on the ATmega328 (Arduino Nano 3.x). It has about the same functionality as the Arduino Duemilanove, but in a different package. It only lacks a DC power connector and works with a Mini-B USB cable instead of a standard one.<\/p>\n<table>\n<tbody>\n<tr>\n<td>Microcontroller<\/td>\n<td>ATmega328<\/td>\n<\/tr>\n<tr>\n<td>Architecture<\/td>\n<td>Avr<\/td>\n<\/tr>\n<tr>\n<td>Operating voltage<\/td>\n<td>5 V<\/td>\n<\/tr>\n<tr>\n<td>Flash memory<\/td>\n<td>32 KB of which 2 KB uses the bootloader<\/td>\n<\/tr>\n<tr>\n<td>Sram<\/td>\n<td>2 KB<\/td>\n<\/tr>\n<tr>\n<td>Clock speed<\/td>\n<td>16 MHz<\/td>\n<\/tr>\n<tr>\n<td>Analog pins IN<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>Eeprom<\/td>\n<td>1 KB<\/td>\n<\/tr>\n<tr>\n<td>DC current by I\/O pins<\/td>\n<td>40 mA (I\/O pins)<\/td>\n<\/tr>\n<tr>\n<td>Input voltage<\/td>\n<td>7-12 V<\/td>\n<\/tr>\n<tr>\n<td>Digital I\/O Pins<\/td>\n<td>22 (6 of which are PWM)<\/td>\n<\/tr>\n<tr>\n<td>PWM output<\/td>\n<td>6<\/td>\n<\/tr>\n<tr>\n<td>Energy consumption<\/td>\n<td>19 mA<\/td>\n<\/tr>\n<tr>\n<td>PCB size<\/td>\n<td>18 x 45 mm<\/td>\n<\/tr>\n<tr>\n<td>Weight<\/td>\n<td>7g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Pin diagram<\/h3>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO.png\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-6033\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-1024x1024.png\" sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-1024x1024.png 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-150x150.png 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-300x300.png 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-768x768.png 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-600x600.png 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-820x820.png 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-1320x1321.png 1320w\" alt=\"\" width=\"1024\" height=\"1024\" \/><\/a><\/p>\n<p>A buzzer<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/buzzer.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-6059\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/buzzer.jpg\" sizes=\"(max-width: 205px) 100vw, 205px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/buzzer.jpg 500w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/buzzer-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/buzzer-300x300.jpg 300w\" alt=\"\" width=\"205\" height=\"205\" \/><\/a><\/p>\n<p>Four female pins<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/kit-pines-hembra-arduino.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-6060\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/kit-pines-hembra-arduino.jpg\" sizes=\"(max-width: 229px) 100vw, 229px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/kit-pines-hembra-arduino.jpg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/kit-pines-hembra-arduino-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/kit-pines-hembra-arduino-300x300.jpg 300w\" alt=\"\" width=\"229\" height=\"229\" \/><\/a><\/p>\n<p>Six 5mm led diodes of different colors<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/leds.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-6061\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/leds.jpg\" sizes=\"(max-width: 183px) 100vw, 183px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/leds.jpg 458w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/leds-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/leds-300x300.jpg 300w\" alt=\"\" width=\"183\" height=\"183\" \/><\/a><\/p>\n<p>Sensor MQ3<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/mq3.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-6062\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/mq3.jpg\" sizes=\"(max-width: 239px) 100vw, 239px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/mq3.jpg 458w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/mq3-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/mq3-300x300.jpg 300w\" alt=\"\" width=\"239\" height=\"239\" \/><\/a><\/p>\n<p class=\"ui-pdp-description__title\"><strong>Description<\/strong><\/p>\n<p class=\"ui-pdp-description__content\">MQ3 Alcohol Concentration Sensor Module<\/p>\n<p>Overview<\/p>\n<p>This sensor detects the concentration of alcohol in the air. It simply connects to an analog input of a microcontroller like Arduino and we can measure the concentration of alcohol.<br \/>\nIt has an analog output that indicates the concentration of alcohol in the environment<\/p>\n<p>(the higher the output level, the higher the gas concentration) and also has a digital output that drops to 0 when the alcohol concentration exceeds the preset level.<br \/>\nIdeal article for use with Arduino boards or any microcontroller (PIC, AVR, FREESCALE, etc.)<\/p>\n<p>Specifications<\/p>\n<p>Operating Voltage: 5Vdc Integrated<\/p>\n<p>LM393 amplifier with variable gain by potentiometer.<br \/>\n2 output pins (analog output and TTL level output).<br \/>\nValid low-level TTL level output, can be connected directly to the microcontroller.<br \/>\nAnalog output of 0 x 5 V , the highest voltage equals a higher concentration.<br \/>\nWorking conditions: Ambient temperature:-10oC to 65oC, Humidity:-95% RH<\/p>\n<p>Pcb<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/pcb.png\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-6063\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/pcb.png\" sizes=\"(max-width: 324px) 100vw, 324px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/pcb.png 324w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/pcb-210x300.png 210w\" alt=\"\" width=\"324\" height=\"462\" \/><\/a><\/p>\n<p>Download gerber file \u2013>\u00a0<a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Gerber_ALCOHOLIMETRO.zip\">Gerber_ALCOHOLIMETRO<\/a><\/p>\n<p>Six 1 Kohm resistors<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-6064\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5-958x1024.jpg\" sizes=\"(max-width: 278px) 100vw, 278px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5-958x1024.jpg 958w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5-281x300.jpg 281w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5-768x821.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5-600x641.jpg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5-820x876.jpg 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5-1320x1411.jpg 1320w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/resistor-1k-ohm-14w-5.jpg 1600w\" alt=\"\" width=\"278\" height=\"297\" \/><\/a><\/p>\n<p>A socket for Arduino nano<\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/zocalo.png\"><img loading=\"lazy\" class=\"alignnone wp-image-6065\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/zocalo.png\" sizes=\"(max-width: 323px) 100vw, 323px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/zocalo.png 594w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/zocalo-300x205.png 300w\" alt=\"\" width=\"323\" height=\"221\" \/><\/a><\/p>\n<p>Source<\/p>\n<pre class=\"lang:default decode:true \" title=\"Source Code\">int sensor=0;\r\nvoid setup(){\r\nSerial.begin(9600);\/\/Configuraci\u00f3n de la velocidad del puerto serial de arduino\r\n\/\/Se configuraran los pines 2,3,4,5,6 y 7 como salidas \r\n\/\/Del pin 2 al 6 van conectados a diodos led con su respectiva resistencia\r\n pinMode(2, OUTPUT);\r\n pinMode(3, OUTPUT);\r\n pinMode(4, OUTPUT);\r\n pinMode(5, OUTPUT);\r\n pinMode(6, OUTPUT);\r\n pinMode(7, OUTPUT);\/\/Va conectado al Buzzer\r\n sensor=analogRead(A0);\/\/Se lee el valor de la entrada anal\u00f3gica A0\r\nwhile(sensor>100){\r\n Serial.print(\"Esperando a que se estabilice el sensor (valor menor a 100): \");\/\/Se imprime su valor por el terminal serial\r\n sensor=analogRead(A0);\/\/Se lee el valor de la entrada anal\u00f3gica A0\r\n Serial.println(sensor);\/\/Se imprime su valor por el terminal serial\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, HIGH);\r\n digitalWrite(5, HIGH);\r\n digitalWrite(6, HIGH);\r\n delay(500);\r\n digitalWrite(2, LOW);\r\n digitalWrite(3, LOW);\r\n digitalWrite(4, LOW);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n delay(500); \r\n }\r\n}\r\nvoid loop(){\r\nsensor=analogRead(A0);\/\/Se lee el valor de la entrada anal\u00f3gica A0\r\nSerial.print(\"Valor del sensor: \");\r\nSerial.println(sensor);\/\/Se imprime su valor por el terminal serial\r\n\/\/Se compara el valor de la variable sensor si se cumple apagar\u00e1 todos los led\r\nif(sensor<99){\r\n digitalWrite(2, LOW);\r\n digitalWrite(3, LOW);\r\n digitalWrite(4, LOW);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensor si se cumple encender\u00e1 el led en el pin 2\r\nif(sensor>100){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, LOW);\r\n digitalWrite(4, LOW);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensor si se cumple encender\u00e1 el led en el pin 2 y 3\r\nif(sensor>200){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, LOW);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensor si se cumple encender\u00e1 el led en el pin 2, 3 y 4\r\nif(sensor>300){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, HIGH);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensor si se cumple encender\u00e1 el led en el pin 2, 3, 4, y 5\r\nif(sensor>350){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, HIGH);\r\n digitalWrite(5, HIGH);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensor si se cumple encender\u00e1 el led en el pin 2, 3 ,4 ,5, 6 y el buzzer\r\nif(sensor>400){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, HIGH);\r\n digitalWrite(5, HIGH);\r\n digitalWrite(6, HIGH);\r\n digitalWrite(7, HIGH);\/\/Se actica el buzzer\r\n\r\n } \r\ndelay(100);\/\/peque\u00f1o retardo antes de comenzar de vuelta\r\n}<\/pre>\n<hr \/>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_222941454.jpg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-6067\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_222941454-1024x768.jpg\" sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_222941454-1024x768.jpg 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_222941454-300x225.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_222941454-768x576.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_222941454-600x450.jpg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_222941454-820x615.jpg 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_222941454-1320x990.jpg 1320w\" alt=\"\" width=\"1024\" height=\"768\" \/><\/a><\/p>\n<hr \/>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_223142597.jpg\"><img loading=\"lazy\" class=\"alignnone size-large wp-image-6068\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_223142597-1024x768.jpg\" sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_223142597-1024x768.jpg 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_223142597-300x225.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_223142597-768x576.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_223142597-600x450.jpg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_223142597-820x615.jpg 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/IMG_20201125_223142597-1320x990.jpg 1320w\" alt=\"\" width=\"1024\" height=\"768\" \/><\/a><\/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 PROJECT<\/strong><\/p>\n<p><iframe loading=\"lazy\" width=\"1160\" height=\"653\" src=\"https:\/\/www.youtube.com\/embed\/XFC17gwYVgU?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 breathalyzer, simple economical and easy to make. We’ll see the source code, the circuit assembly all step by step. The printed circuit board will be available for free. What is a breathalyzer? It is a device to measure the amount of alcohol present in the […]<\/p>\n","protected":false},"author":1,"featured_media":6066,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[648],"tags":[1010,45,767,351,1011,347,349,986],"_links":{"self":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/6074"}],"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=6074"}],"version-history":[{"count":3,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/6074\/revisions"}],"predecessor-version":[{"id":6176,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/6074\/revisions\/6176"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/media\/6066"}],"wp:attachment":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/media?parent=6074"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/categories?post=6074"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/tags?post=6074"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}