Two-tone solar buzzer (CB20493E)

This circuit was found in a 1991 publication. The transistor can be a general-purpose type.

Sequencer for Stepper Motor Control (CB11862E)
This circuit generates sequenced pulses to control a stepper motor. The speed at which the pulses...
VHF Amplifier (CB3886E)
This circuit was originally designed to measure the gain of two-door RF MOSFETs as indicated by...
6 V x 1 A power supply (CB1157E)
This regulated power supply can provide currents up to 1 A to a load. The transformer may actually have...