This project is a small automatic cooling system for home theater rack. It supports 2 temperature sensors for different zones in the rack and 2 12V PWM fans (standard for PC case cooling).
There is a power switch connector for a switch mounted on the casing (will be designed and 3D printed later). A reset button is provided mostly for reprogramming purpose. There are 4 buttons for setting up temp...
The PCB attaches to the back of the OP-320A unit, which is a cheap operator console panel you can get off aliexpress or ebay for about $50, you remove the PCB with the unit and attach this as a replacement to give arduino compatibility.
Wiring mostly copied from teensy++ and uno so something of a mix here, Uses a standard Arduino shield header but you will definitely need to adjust your sketch...
input AC220V + -10%, output 0 ... 30V adjustable,
current 0 ... 1A adjustable
Using isolated flyback switching power supply structure,
high efficiency, primary and secondary side isolation
Small size, approximately equivalent to mobile hard disk, easy to carry
Built-in friendly HMI, LCD display, encoder adjustment
With additional and secondary development functions, such as batte...
Card based to ESP32 Wroom 32D
Micro USB Interface Power & Serial
2.2 Inch ( 240x230 ) Color LCD Screen
Micro SD Card Reader ( SPI )
3.7v LiPo Battery Port
Real Time Clock ( I2C )
Selection button x 4 ( I2C over I2C GPIO Extender)
External Reset Port ( SWITCH )
External Analogic Input X 2
External Optocoupled Digital Input X 4
External Optocoupled Digital Output X 4
External I2c Port...
Mini shield for 16x2 display
To simplify the work, it was decided to create a small card (size 43x16 mm), a mini shield that simplifies the work.
The circuit is very simple, there are some pin strips and a jumper for the backlight, there is also a 10k trimmer for contrast adjustment.
For the connection to Arduino there is an 8-pin female pin strip on which all the necessary signals including the p...
(still work in progress, not fully tested)
A smart MIDI box based on a STM32 "blue pill" microcontroller (STM32F103C8T6).
Software is hosted on Github: https://github.com/retro16/MidiBox
Uses a HD44780 16x2 LCD screen with the usual I2C converter.
The interface is made of 4 push buttons arranged in a directional pad (up, down, left, right).
A SD card can be attached for more features.
This is an arduino nano based soldering station. **Tested, working version.**
-Designed to work with rotary encoders.
-Built in Beeper.
-Built in memory buttons to store often used temperature values.
-Built in Debounceing for the buttons. (up to 7 buttons, built in 3 buttons)
-Designed to work with a MAX6675 module for temperature readings from a K-type thermocouple.
-Built in LCD head...
### Постановка задачи ###
Возникшая идея концепции "объединить будущее с прошлым" требовала соответствующих элементов для полноценной картины такого воображаемого мира. Бумажный вариант сразу же был отметен (какой уважающий себя человек будущего использует бумагу?), следующий возникший вариант - пластиковая открытка - оказался не оригинальным (во время охоты за идеями было обнаружено множество ва...
UV Box timer.
Articles on my blog about it :
Time based control for drip irrigation system, with 16x2 LCD (HD44780) for status and configuration.
I designed the board single sided for easy etching at home.
Originaly created using Eagle, and then imported to EasyEDA.
Aim : To design PIC16F877A based Temperature controller, LM35 as Temperature Sensor, A pot reference set point adjustment. LCD to display Current Temperature, Reference Temperature and status of the output.
Software : MPLAB IDE.
Code : Assembly language(under development...).