Broadband amplifier (CB9179E)

Found in an old Popular Electronics, this circuit has a gain of 20 dB. The integrated circuit is uncommon today.

Electronic Target Shooting (CB16586E)
This circuit was found in a 1987 publication, but it can still be easily assembled today as the...
0 to 100 degrees Celsius Thermometer (CB1486E )
This circuit uses a common diode as sensor. The output goes from 0 to 10 V with the temperature change in...
Audio Oscillator 2 (CB12907E)
This circuit, from an old publication, can also use modern transistors. Note that the unit is...