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....
# HOME PROJECT WEBPAGE #
# Version #
Just replaced 2x TL082 to 1x TL084... Added diode bridge on power supply.
mp3 player CD Changer Emulator for Nissan Maxima, Pathfinder and Infinity I30. Allows to play mp3 files from USB stick. Pretends to be cd changer to head unit, therefore all head unit and steering wheel controls supported. Based on DFPlayer Mini board and ATTiny85.
The Arduino platform has become quite popular with people just starting out with electronics. It is an open-source hardware design, based on microcontroller board designs and provide sets of digital and analog I/O pins that can be interfaced to various expansion boards ("shields") and other circuits. The boards feature serial communications interfaces, including USB on some models, for loading pro...
This is a simple arduino sheild that can run on it's own as an arduino uno once it's powered up using the power input. to upload a code, simply remove the **ATMEGA328p** from your reguar arduino board and place this sheild on top of it. Then plug ur arduino board and upload a code.If you want to burn the bootloader of ur ATMEGA328p chip, then udon't have to remove ur ATEGA38p chip from ur regular...