Ttl logic tester

Posted on Nov 3, 2012

Gates Gl and G2 together with resistors Rl and R2 form a simple voltage monitor that has a trip point of 1 volts. Gate G3 is simply an inverter. The display section of the tester consists of a common anode alphanumeric LED and current-limiting resistors

Ttl logic tester
Click here to download the full size of the above Circuit.

It indicates whether the input voltage is above or below 1,4 V, and displays a H or a L (for high or low logic-level) respectively.

Leave Comment

characters left:

New Circuits



Popular Circuits

AVR LED RF Field Strength
Fast Low Duty-Cycle Pulse Oscillator
Stereo Tone Control using LM1036
Inductance Meter Circuit
starting AVR development
fm radio receiver using tda7000
Auto Heat Limiter for Soldering Irons
How to Control Electronic Circuits Using a Computer and the BASIC Programming Language
TDA2030 active speaker audio systems with 60 watt output power