Programmable Signal Generator
This project describes a simple digital signal generator capable of generating a square wave from 1kHz to 68MHz with an accuracy of 1.1%. You enter the frequency on a numeric keypad, and the frequency is displayed on an I2C 128x32 OLED display.
Used components: ATtiny85, OpAmp INA331/LTC6904, OLED display (connector JP1/JP3).
An IoT board around ESP-12S module (with ESP8266) powered by a 9V-26V DC jack, with 3 signalling WS2812 RGB LEDs, 2 buttons, an OLED display, a beeper and an I2C temperature & humidity senzor (AM2320). The board is meant to act as a hub and connect to other devices with more sensors, or as a driver for an external device.
Schema & board designer: Ivan Voras
This is the code I use for the clock. Feel free to change it in each manner your want. ATTENTION: Dont use the POV Clock_old. I use it for backup purpose only. It wont work! The file POV Clock_new and POV_Clock_new_SSD1306 are working well and are fully tested. But i dont take any responability if something dont work like you want. For example: the optocoupler is tricky. Maybe you need to adjust t...
This is the schematic for a project I've did on my YouTube Channel. Click the image below to check out the video.
[![Arduino Heart Rate Monitor](https://img.youtube.com/vi/iVN3gXZ72P8/0.jpg)](https://www.youtube.com/watch?v=iVN3gXZ72P8)
If you have a Wemos D1 mini card and you want to test the series of sensors contained in the package "37 in 1 Sensor Module Board Set" which is sold by many sites you can use this shield.
On the shield are available many connectors that are already properly connected with the digital or analog ports of the Wemos D1 mini card. On the board there is also already a power supply stage that allows powe...
An Arduino development board with a small OLED screen, a joystick, buttons, buzzer, and alligator clip connectors for other devices. This was inspired by the Adafruit circuit playground: https://www.adafruit.com/product/3000
Visit http://johan.vandegriff.net/ArduinOLED/ for more info.