This 13.8Vdc 2A Regulated Power Supply Circuit Diagram consists of step-down transformer Tl, a
full-wave rectifier bridge (D1 through D4), and a filtering regulator
circuit made up of Cl, C2, Rl, R2, R8, D5, and Ql, When 120 Vac is
provided, the neon-lamp assembly LI lights up, and transformer Tl
changes 120 Vac to about 28 Vac.
The rectifier bridge, )1 through D4,
rectifies the ac into pulsating dc, which is then filtered by Cl.
Capacitor Cl acts as a storage capacitor. Zener diode 1)5 keeps the voltage constant across the base of
Darlington regulator Ql, causing constant voltage across resistor R3 and
the (+) and (-) output terminals, where the load is connected. Fuse F2
is used to open (blow), if the current through the output terminals is
too high. Make sure to take proper precautions when using projects
powered by 120 Vac.
13.8Vdc 2A Regulated Power Supply Circuit Diagram
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