Ammeter (CB9660E)

This current meter with many scales was found in a 80s American documentation. The operational amplifier is from that time, uncommon nowadays.

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Precision Sample and Hold (CB11544E)
This circuit was found in Linear Circuits Applications of Texas Instruments, originally using the...
Rocket Launcher (CB4447E)
This circuit, from a 1988 publication, consists of a timer that activates a relay at the end of a...
Phototransistor Optical Ttrigger (CB14648E)
This configuration was found in the Texas Instruments optoelectronics manual. PNP transistors...