Suggested by General Electric documentation from 1968, this circuit activates a relay after 60 seconds, keeping it closed. PUT is an uncommon component today.
In the figure we show a simple way to use a zener diode to protect a load against overvoltage. The...
We found this configuration in an American 80's documentation. The circuit can be implemented with an...
We found this circuit in a documentation on active filters from 1977. The gain of this circuit is...