30-hour timer (CB21403E)

This high-precision circuit was found in a 1969 documentation. The components are from the period. R1 is 100 G ohms and C1 is 0.1 uF.

| Clique na imagem para ampliar |

Photoelectric alarm (CB22336E)
Found in a publication from the 60's, this circuit uses the CK722, germanium transistor of the...
Ramp Generator (CB16917E)
From an input signal, and using an unusual current source, this circuit generates a ramp, that is, a...
Common Load Timer (CB17040E)
With this timer we can start between 30 seconds and one and a half seconds, time set in the pot....