Power on reset (CB7176E)

These reset circuits when the power is turned on were found in an 80's EDN. The circuit also applies to other logic.

| Clique na imagem para ampliar |

Basic Monostable with the 555 I (CB1295E)
This basic configuration can be found in a lot of articles on this site. In this case, the relay...
Light operated switch (CB6856E)
This circuit is from American documentation from the 1980s. The transistors are general purpose...
Bipolar Transistor Photo Relay (CB16105E)
The circuit is simple, as it uses only one transistor and a relay that can be MC2RC1 or MC2RC2,...