This latching light alarm was found in the 1995 Encyclopedia of Electronic Circuits Volume 5. The circuit is powered with 12 V to provide a signal to a power stage.
This circuit was found in an Electronics Now from the 90s. The frequency depends on the crystal. The...
We found this circuit in the 1974 Ferranti transistor manual. The transistors are general purpose, and...
The circuit shown is used to reset TTL logic when power is established. The circuit uses a 7413...