B4R Share Your Creations

 

Talking Clock

The clock uses ATMEGA328 internal timers to get 1 minute time base which is as accurate as the...

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RS485 <> TTL brakeout board

Hi All, In fact this is not a creation, but an added value for those designing hardware using...

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SD Sound Recorder

A sound recorder and playback for Arduino Uno or Nano with ATMEGA328P device using SD card. The...

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Alarm for Co2 gas

Hi This project was initially just a student project but then I received a number of orders...

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TFT Voltmeter

The code doesn't use any library, the SPI is set by inline C. Using 1.8" TFT with ST7735 driver...

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OLED Voltmeter

Oled display of text and bitmap and analog bar. The code uses wire lib only to drive the I2C...

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TFT Timer

The code doesn't use any library, the SPI is set by inline C. There are functions for...

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Indicates temperature and humidity

This project is used to show temperature and humidity. To reduce the cost, I showed the...

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Talk to Arduino

Control 2 outputs (pins 2,3) of Arduino Uno by talking to your Android device using the B4A app...

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Automated ESP WiFi configurator (once more)

Android configuration app: 0) ESP8266 MCU modules that are with Erel's WiFi Remote configuration...

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an esp8266 making MQTT gateway between rfbridge MQTT client and mobile MQTT client

this example of MQTT client on ESP8266 is built to make a gateway between a rfbridge sonoff with...

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Solar Heating - circulating pump control

Something that worked for more than 40 years broke and I had to find a replacement. I want to...

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Doorbell using I2C EEPROM

A doorbell for Arduino Uno or Nano interfacing EEPROM with I2C. The EEPROM 24C512 is 512Kbits...

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Talking Voltmeter

It's good to talk. Voltmeter app in B4A using Text To Speech. Voltage input is at pin A0...

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Arduino Oscilloscope

Low frequency oscilloscope for Android using Arduino Uno or Nano, frequencies up to 5KHz. The...

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Frequency counter

The Arduino generates an accurate 1 second time base for the counter by cascading timer0 and...

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RF 433mhz repeater with esp8266

it is a RF 433mhz Repeater with esp8266 hard configuration: - 1 esp8266 Witty Cloud - in front...

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Create a real device recognized by Alexa (Echo)

But first, let me keep doing well this library and continuing updating sending to me some...

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esp8266 making gateway 433mhz with MQTT

it is a 433mhz RF-MGTT Gateway hard configuration: 1 esp8266 Witty Cloud in front of 433mhz ...

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Build Serial Servo High Torque

Build a powerful digital servo using Arduino and B4R Wire drawing Communication Use the...

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