Electronic Cw Bug Keyer Circuit

Posted on Apr 23, 2012

This keyer uses skin conductivity to simulate the old-fashioned mechanical CW bug keyer. When the dit paddle is touched the bias on the inverter, ICl-a is shunted to ground, and it produces a logic high, causing oscillator sections CD to generate a low-frequency square wave keying Ql for a series of dits.

Electronic Cw Bug Keyer Circuit
Click here to download the full size of the above Circuit.

When the dah paddle is touched, section b produces a logic high, driving keyer Ql on.

Leave Comment

characters left:

New Circuits



Popular Circuits

AVR Programmer with ATMega8-16
Microvolt probe
Optical schmitt trigger
Stepper Motor Circuits
how to interface rfid with 8051
QRP antenna tuner circuit
switching between parts circuit pulse input
USBStickLogger - USB thumb drive logger for serial data - fischl.de
Audio Speaker Crossover Circuit
CD4011 dual-produced sound and light control delay lamp circuit