Compact speedometer with OLED display and temperature measurement.
It features an ATtiny85 uC with USB programming and battery charging and protection circuitry. I will be using it to measure the speed of my bicycle and determine the temperature around me on my rides.
The project consists of 2 pcbs: the sensor that will be mounted on the wheel of my bike and the actual speedometer.
T12 Soldering Controller based on Attiny85, 0.98" OLED display, encoder and buzzer.
-Temperature PID controller
-One shared pin to read encoder and output buzzer signal
-Graphical OLED display (set point, current temperature and analog power bar)
-Input for handle vibration sensor
This is a Raspberry Pi Zero W hat/shield with USB MIDI input, stereo audio output, 3 user-configurable buttons and OLED display.
To use as an audio card, enable PWM audio output by adding `dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4` at the end of *config.txt* file.
Remeber that HDMI audio output is the default; use `raspi-config` to force output to 3.5mm audio jack.
If you can't find 47uF...
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 https://johanv.xyz/ArduinOLED/ for more info.
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)