Gain 10 Amplifier (CB25636E)

Using a general-purpose transistor this AC amplifier was found in the November 1993 issue of Electronics Now.

Fourth-order low-pass filter (CB25596E)
Using two 741 operational amplifiers, this low-pass circuit has a cutoff frequency of 10 kHz. We...
120 V x 40 W x 400 Hz inverter (CB7271E)
This circuit was obtained in Motorola documentation from 1969. The components are from that time. In...
Battery test circuit (CB7132E)
Found in an Electronic Design from the 90's, this circuit indicates three voltage levels by...