Direction Signal (CB25608E)

This circuit was found in the September 1993 Electronics Now magazine. It is based on the 555 and powers an audible indicator.

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Photodiode amplifier (CB6862E)
Found in Linear Technology documentation from the 90s, this circuit uses an operational amplifier...
High Output Voltage Amplifier (CB6179E)
This circuit is from Mullard 1969 documentation. The circuit operates at a relatively high supply...
Relaxation with Operational Amplifier (CB25325E)
The figure shows the basic circuit of a relaxation oscillator with operational amplifier. The...