The EasyEDA "Tesseract" DIY Guitar Practice Amplifier is an LM386 based low power amplifier designed to deliver up to about 500mW into an
8 Ohm speaker when run from a 9V battery.
**Tesseract can be heard on YouTube here:**
The design given here - which includes a complete PCB design and Bill of Materials - is highly flexible and allows the several options...
**Capacitance meter with a current source to measure C from 1 pF to 400+ mF range**
At the beginning of a huge thank to you for the Dillon from EasyEDA Team for helping to make this documentation. Without him, t...
•Channel on Youtube / Канал на Ютуб: https://www.youtube.com/channel/UCyVzmkYMe5pQK0HMWgyaE9Q?view_as=subscriber
•Vidio on Youtube / Видио на Ютуб: https://youtu.be/Mwh9Z-UxknA
•Project circuit / Схема проекта: https://easyeda.com/romans.dodu/LED_Vu_meter_LM3915
•Archive with LED Vu meter LM3915 files link: http / Архив с файлами светодиодного индикатора звука на LM3915 ссылка: http://tiny.cc/m...
This afforable Geiger Counter that works as standalone device and also can connect to other external devices (like RaspberryPi/Arduino or other GPIO devices) to send the "clicks" thru GPIO interface.
The Arduino code for the Geiger counter is available here:
- Pin D2 --> Arduino interruption
- Pin D7 --> Buzzer
- Pin D8 -->...
> I got a lot of messages about the project, or the code, but the situation was I put the project on hold for a while, when waiting for parts to arrive, then modified multiple times without documenting etc... the project got finished working well, heat up quickly, but when I have time I will make a fully documented mark 2 version.
**This is an experimental electronic circuit, without any warranty.**
Single channel 2-way 24 dB/oct Linkwitz-Riley active crossover.
Crossover frequency: 2.9kHz
PCB dimensions: 60mm x 100mm
Equalizer characteristics - simulation
TDA7439 + NodeMCU + Aptx module audio board
OLD version, noisy.
New version with ground separation: (https://easyeda.com/fxndstrs/tda7439)