The ATmega328p Transitor Tester is a pocket-sized version of the famous component tester developed by Markus Frejek and Karl-Heinz Kübbeler featuring automatic detection of NPN and PNP bipolar transistors, N- and P-channel MOSFETs, JFETs, diodes, double diodes, N- and P-IGBTs, thyristors, triacs, inductors, resistors and capacitors.
- Project Video (YouTube): https://youtu.be/J4nZ0n5su...
Progetto per la realizzazione di un circuito che determina lo stato di carica di una batteria della serie 18650 o similari.
I quattro Led visualizzano riospettivamente
- 0% carica con **nessun** led acceso
- Ul25% carica con il primo led **rosso** acceso
- Ul50% carica con il secomdo led **rosso** acceso
- Ul75%carica con il terzo led **giallo** acceso
- Ul100% carica con il quarto led **verde**...
LM393 Low Power Dual Voltage Comparators DIP-8 test circuit.
Very inexpensive and a good way to learn about OpAmps. Needs 9 volts to operate.
Switch not in schema or PCB, added while building.
Zip file contains a short video of the circuit working.
Tested with DBL358, IR3F02, IR9082, IR94558, JRC4558D, NE5532, KIA393P, HA17393
![enter image description here]
![enter image de...
There is nothing worse than running your drops only to realize that you have a fault in one of the cable runs. The best approach is to get it right in the first place by using a "LAN Cable Tester". Sometimes, cables can also tear because of poor material quality or bad installation or sometimes they get gnawed by animals.
In this project, I am going to make a LAN cable tester with just a few basi...
RS-232 DE-9 Break-out Board
Allows for special wiring of RS-232 connections.
Jack 1 Pins 1,2,3,4,6,7,8,9 can be connected to Jack 2 Pins 1,2,3,4,6,7,8,9 in any combination.
Allows for easy handshaking and DTE/DCE adaptation.
Use Bi-directional, dual color LEDs for signal status indicators.
This is an automatic Cat6 / Cat5 network cable tester designed using NE555 timer and 4017 decade counters. This unit test all 8 wire lines of twisted pair network cable and indicate pass/fail status with single LED.
We design this unit to test network connectivity issues in Cat6 / Cat5 cable systems and it is capable to check both crossover and straight-through type network cables.