In fact, this 1967 Electronic Design circuit generates two symmetrical ramps whose frequency depends on the values of the components used. Modern equivalent transistors can be used.
We found this circuit in a technical documentation on thyristors from the 70s. The circuit is set...
This basic circuit is from an old documentation. The relay must be 50 mA maximum and must have a...
We found this circuit in documentation from Linear Technology of the 80s. The circuit uses...