**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...
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...
# **DIY JBC 245 Controller (not tested yet)** #
Wich can be powered with a standart 19V DC laptop charger.
The project based on the Atmel328 μc, and i try makes simple as i can. The first problem driving a jbc tip is the thermocouple and the heater have a common pin and its not the GND. On some forum i found the easyest way to do is just siple pass the heater current on the thermocupple but thats...
Old cartridge for Commodore 64 it talking :)
![Thanks to JLCPCB.jpg](//image.easyeda.com/pullimage/YvMSGRgWN1bOEOnXqZJF3mFo2vBzwQChiz6Gz1h9.jpeg)
This is a small pcb that is designed to be used on an electric go-kart to display a stopwatch, motor RPMs, and cart speed as well as record this data on an SD card with a time stamp for analysis. The project is Arduino based and is ran off of 7-59 VDC or directly from a 5V source through any of the 5V or VIN pins on the data logger shield (this is not a protected input). It is designed to have w...
# Addition for STM32 discovery/nucleo for L/C measure #
![LM 393 LC meter.jpg](//image.easyeda.com/pullimage/Xf9og3xv0VKbZ6QSkXsz1Y2ViCPYv6ay1rW9pzmY.jpeg)
![disco sh plus lcm merged top.jpg](//image.easyeda.com/pullimage/PH0RNomSP4RWTe5KR26NjTiPTzkTe94ACJlbghgD.jpeg)
![disco sh plus lcm merged bottom.jpg](//image.easyeda.com/pullimage/thOhv5tdVPsLGIBEYk4NwwL7T9XWhP1WPlvRs2zS.jpeg)
![556 C meter 2 ranges.png](//image.easyeda.com/pullimage/sRbpQWtQFjjlgqhuY0fywZnC8BT5Q9rVEZ06BTHK.png)
Using 555/6 as a multivibrator we can measure the capacity of the connected capacitor.
At all times, the 555/6 charges to 2/3 VCC and discharges to 1/3 VCC the connected capacitor, supplying a rectangular signal at the output in accordance with the capacitor charging and dischar...
1. For L/C meassure by LM311 and oscillation circuit.
2. For FREQ meassure by special input circuit with a capacitive coupling
3. For C meassure by 556N freq to C - range 1-1000 pF
4. For C meassure by 556N freq to C - range 1-1000 nF
![multi freq meter V_02 cover.jpg](//image.easyeda.com/pullimage/YyWhE1CwRVAFl7XpCxxjQZ6YGdweU7GAEVO5MXL3.jpeg)
![multi freq meter V_02.jpg](//image.easyeda.com/...
# Legendary LM311 comparator - addition for STM32 discovery/nucleo for L/C measure #
![LM 311 LC meter.jpg](//image.easyeda.com/pullimage/7Okxq5DykgHnCnwNFLRkTub2UYa9Lmh6a4129xz4.jpeg)
![disco sh plus lcm merged top.jpg](//image.easyeda.com/pullimage/LQC1eyRJZIRFOzxIL3IuzkEtYxhQRH4rhLdPK3nV.jpeg)
![disco sh plus lcm merged bottom.jpg](//image.easyeda.com/pullimage/QNkrlEUThEK3aEwsCeKzoxJosEpS...
![555 C METER.png](//image.easyeda.com/pullimage/mcOJA7x4P3U8o93umkhTMK6P1FIKYIFxnxxfelKd.png)
Using 555 as a multivibrator we can measure the capacity of the connected capacitor.
At all times, the 555 charges to 2/3 VCC and discharges to 1/3 VCC the connected capacitor, supplying a rectangular signal at the output in accordance with the capacitor charging and discharging cycle....