126 MHz Logic Probe (CB21195E)

This logic probe was found in a Popular Electronics from the 90s. The circuit is TTL and must be powered with 5V.

| Clique na imagem para ampliar |

Schmitt trigger (CB7983E)
This simple trigger circuit was found in a 90’s American documentation. The integrated circuit is...
Power Outage Alarm (CB24152E)
This sensitive circuit was found in the August 1971 issue of Radio Electronics magazine. The SCR...
Varicap Beat Oscillator (CB25649E)
The varactor or varicap diode tunes the signal for listening to SSB signals on a common receiver. The...