Latching relay (CB25722E)

The figure shows how to connect a relay to obtain the latch effect. The circuit is from an Electronics Now from June 1994.

TLV8802 Dual Nanopotential Operational Amplifiers (COM158E)
November 2016 - Texas Instruments' new TLV8802 nano-power operational amplifiers for wireless...
Photometer (CB19147E)
This sophisticated photometer that has a light comparator with LED indicator came out in an...
Modulated tunnel transmitter (CB23886E)
This is a version of the previous circuit that includes a tone modulator based on a Hartley...