4 to 32 minutes timer (CB21437E)

This circuit was found in a 1967 publication. Transistors can be modern general purpose. Component values can be changed for other timings.

| Clique na imagem para ampliar |

Pulse Generator XR2206 (CB24509E)
We found this circuit in the Radio Electronics magazine of May 1977. The circuit has the frequency...
Micropower Clock (CB6504E)
This 200 kHz oscillator was found on a 90's EDN. It consumes only 2.8 mW and has CMOS compatible...
Signal follower (CB22322E)
This tracker for audio and RF signals was found in old American documentation. Transistors and...