Using the 4001 integrated circuit, this latching relay can employ any general-purpose transistor. The power supply is according to the relay with voltage up to 12 V.
This bidirectional circuit was found in an American documentation from the 80's. The LEDs are...
MEMS Oscillators Provide Semiconductor-Grade Reliability and Superb Frequency Stability Over a...
We found this circuit in a documentation on active filters from 1977. The gain of this circuit is...