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Gas Sensor MQ-7 Arduino and Raspberry Pi Hardware schematic
Hallo everyone, I'm Gabriel. I'm new to this world. I used to spend time in analog electronic and now I feel a bit confused by some tutorials about logic digital signals. My goal is to sense sensors...
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7941E RFID Module - Wiegand vs UART
I recently bought several 7941e+ RFID modules to read 125kHz RFID cards. While a few of them work perfectly and read data at 9600 baud, I’m facing issues with some others that don’t seem to work at...
View ArticleIRremote garbage output
Hi all, I am using IRremote 4.4.0 with a Nano clone to receive IR remote signals. Using an old version of IRremote 2.8.1 I get codes generated in serial monitor, but after updating to the latest...
View ArticleLoad cells, Nano and no HX711
I am wanting to use a Audrino Nano to weigh an item on a set of 4, 50kg bathroom scale loadcells. I am wanting to do this without using a HX711 amplifier board. The scales do not have to be extremely...
View ArticleDs18b20 wiring into more than 15m
I would like to ask if it is possible to wire multiple DS18B20 every 1m up to 15meters distance? if it is so, what would be the size of wire and what is the resistors needed and what would be the...
View ArticleTake off the jumper
Continuing the discussion from IR sensor trouble: take off the jumper if using en pin 2 posts - 2 participants Read full topic
View ArticleESP32 S3 I2C not working
hey guys, I use Arduino and ESP32-S3-N16R8, i can't find my i2c(V53L1X & 1.3ich oled) through i2c scanner, even i use Wire.begin() to reset my pins.HOW to troubleshoot? it's emergency 23 posts - 2...
View ArticlePH Sensor 4502C temperature pin
Hello, I am using an arduino uno R4 wifi with a temp sensor ( would like to read the external temp DS18B20 and a ph sensor with a 4502c module and on this module, there is a temperature sensor... The...
View ArticleRP2040Connect problem with MPU6050
Has anyone managed to get the RP2040Connect to work with the MPU6050? I have a medical application that currently runs on a Pi Pico and reads out two GY-521/MPU6050 sensors all night.I want to go...
View ArticleUsing Grove GSR as EEG
Could Grove GSR sensor board could be used to measure brainwaves? Yes I know this is used to measure skin resistance not current but I think (correct me if I am wrong) from Ohm Law, also I saw Grove...
View ArticleGetting 5V power supply for sensor through ESP32
I am trying to program HC-SR04 Sensor to measure distance and send the measurements through LoRa. I have an ESP32-S3 board but since the sensor requires a 5V power supply to operate, I would need the...
View ArticleLooking for Solutions for Detecting Initial Speed of BB Pellets
Hello everyone, I recently tried to measure the initial speed of BB pellets. Currently, I am attempting to use a red laser and a TEMT6000 photodiode sensor to create a photogate detector. Since most...
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Power measurement with SCT-013, ADS1115 and Arduino
Hi. I want to control the consumption of a 230 V AC line. To do this I use an Arduino Mega 256, an ADS1115 and an YMDC SCT-013 10A/1V transformer. The circuit is the following: And the sketch: //...
View ArticleGY-MCU8833 interface
I have a couple GY-MCU8833 sensors, but I cannot find any documentation describing how to use them. Maybe it just is not available in english? These are based on AMG8833 IR sensors, but use a serial...
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Sensirion scd30 + Esp 32 + electrovalve
Good morning, I intend to create an installation with the sensor SCD30, one relay and a air electrovalve. Each part works individually but together not. I mean, i think i wrote something strange...
View ArticleHi guys .. I receive this error message. Can you help me?
hi guys .. I receive this error message. Can you help me? In file included from C:\Users\ahmed\Downloads\gpsObstaclePID1.00\gpsObstaclePID1.00.ino:12:0:...
View ArticleArduino IDE cannot communicate with Arduino board
I want to make a pressure sensor with an LCD display. But the microcontroller and Arduino ICD cannot be imported correctly. What is the problem? My interface selection is correct (Arduino Uno). Is...
View ArticleADS1115 strange readings
Hi, I'm working on a project where I need to read three sensors with a reasonable level of precision. So I've been working with an ADS1115 on a breakout board for development. Everything is great when...
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Differential Pressure Sensor with 4-20mA Output
I am not an electrical engineer, and I don't know much about electronics. I'm an IT guy and typically write programs in C# and manage SQL databases and such, but I have been tasked with a project that...
View ArticleProblem connect blynk my owner server
#define BLYNK_PRINT Serial #define RELAY_PIN_1 32 // F1 #define RELAY_PIN_2 33 // F2 #define RELAY_PIN_3 25 // F4 - 3 second hold #define RELAY_PIN_4 26 // RESET #define RELAY_PIN_1 V10 // F1 #define...
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