17 V x 1.5 A Power Supply (CB985E)

This unregulated power supply can source 1.5 A to amplifiers and other circuits. The diodes must have a PIV of 50 V (minimum).

Light Sensor (CB5973E)
This circuit can use any comparator or even an operational amplifier. We can use the LM339 and the...
Old RIAA Equalizer (CB1375E)
This circuit is from a Japanese magazine of 1973. The circuit is designed to withdraw the power...
Variable Frequency Oscillator with Crystal (CB4046E)
This circuit generates signals that can be adjusted in a small range around the frequency of the...