Fast log generator (CB7595E)

We found this circuit in a 90s Popular Electronics. The operational amplifier can be replaced by current equivalents.

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Full wave dimmer (CB7208E)
Found in Motorola's 1965 manual, this full-wave dimmer controls a load that depends on the used...
Linear Summing and Differentiating Circuits (CB20147E)
The two adding and differentiating circuits with operational amplifiers given below were obtained from...
Digital Windshield Wiper Timer (CB24567E)
This sophisticated circuit was found in the November 1978 issue of Radio Electronics magazine. Based on...