Issue
144 July 2002
An
80C31-Controlled Power Supply
by
Noel Rios
Even if you’re a novice, it’s pretty easy to control
the power supplied to the circuits you’re working
on. In this article, Noel introduces us to a 80C31-controlled
power supply, which is a circuit that enables you
to monitor and alter voltage and current levels.
Start
•
Circuit Description • Construction
and Assembly • Using The Power
Supply •
Sources
& PDF
Every
engineer, technician, and hobbyist needs a stable power
supply to power up the circuits they’re working on.
However, it would be nice if you could vary the potential
to accommodate many circuits. It also would be pleasant
if you could vary the current supplied to the circuit,
which would limit the power delivered in case something
is wrong. The circuit featured here is an 80C31-controlled
power supply that has voltage and current limits that
you can change to suit your needs (see Photo 1). Its
voltage ranges from 0 to 22 V, and its current ranges
from 0 to 2.5 A.
In
most power supplies, you turn a knob to adjust the voltage
and current. The 80C31 CPS, however, has a keypad for
entering the voltage and current, as well as Set Voltage
and Set Current buttons so you can change the voltage
and current immediately by moving through a few menus.
Additionally, you can monitor the voltage and current
delivered by the power supply with the 80C31 CPS’s built-in
voltmeter and ammeter. The voltage and current is displayed
using an LCD.
