Amplifier for photodiode 1 (CB6787E)

We found this circuit in Harris' 90s documentation. The circuit applies to modern operational amplifiers.

6-Channel Sequential (CB16306E)
This system of sequential lights for shop windows, discotheques, stores, does not use integrated...
Delay circuit (CB7545E)
This circuit was found in an Elektor from the 90s. Next to the circuit we have a table with the...
Liquid level sensor (CB23807E)
This sensor was published in Radio Electronics magazine in April 1962. The two-transistor circuit...