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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Variac (CB17081E)
This electronic variac has the traditional configuration with triac already explored on the site,...
100 kHz Power Oscillator (CB12822E)
With this oscillator we can obtain a signal of 10 W of power at the frequency of 100kHz. The...
50 ohms Line Driver (CB16686E)
This circuit is based on an LM3900 transconductance operational amplifier, found in 1992...