<p><span style="color: #4b5054; font-family: Raleway, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">HS402-WiFi Oscilloscope is a DIY Oscilloscope that has been designed to provide good performances out from the STM32F411 Black Pill development board. </span></p>
<p><span style="color: #4b5054; font-family: Raleway, 'Helvetica Neue', Helvetica, Ar...
# 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...
# HOME PROJECT WEBPAGE #
# Version #
Just replaced 2x TL082 to 1x TL084... Added diode bridge on power supply.
This circuit is a charger for single-cell lithium (Li-Ion) and Polymer (LiPo) batteries. It can sources energy from DC jack connectors (two different dimensions), USB-C and solar panel. It uses MCP73871 which has the peculiarity to smartly adjust the current sank, making it ideal for solar-powered applications, where the available energy could be really scarce and high-varying over time.
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/...
LiPo Power Board is a power manager for your battery-powered product. Since the *breakout* format, it is intended for prototyping and development. It is designed for a single cell LiPo battery (3.7V) and to supply 2 voltages: a fixed 3.3V and a secondary adjustable output, able to deliver higher voltage and current. A physical switch allows you to cut out the voltage on both channels. USB-C and Ja...
# Stefan Wagner assembled and running this cartridge #
Thanks Stefan for feedback.
# My perform #
![01 2 brothers .jpg](//image.easyeda.com/pullimage/16bLjADDPKz...
Old cartridge for Commodore 64 it talking :)
![Thanks to JLCPCB.jpg](//image.easyeda.com/pullimage/YvMSGRgWN1bOEOnXqZJF3mFo2vBzwQChiz6Gz1h9.jpeg)
**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...