|
 |
DiscoverCircuits.com -- Hobby Corner
Last Updated on:
Tuesday, June 01, 2021 03:06 PM
Hobby Circuits List
The contents &
graphics of Discovercircuits.com are copyright protected.
LINK to Dave's circuit, but DO NOT COPY any files to your WEB
SITE server |
|
|
|
|
More Variable Power Supplies
Variable Gain Amplifiers
AC-AC Converters |
|
VARIABLE ISOLATED AC
VOLTAGE SPANS 0VAC TO 280VAC |
In electronics, it is often handy
to have a fully isolated variable AC power supply. With such a device you can
safely test various AC powered circuits and even probe around in the circuit with an
oscilloscope. |
|
|
| The hobby
circuit below was designed
to provide up to 500 watts of AC over a range of zero volts
to over 250vac. For safety, it is designed
with two separate outputs. One output
ranges from zero to about 140vac. The second output ranges from zero to over 250vac.
Different sockets are used, so a standard 120vac device can’t be accidentally plugged
into the higher voltage socket. An AC volt meter and an AC current meter could be
included if desired as shown in the photo below. A three position left off toggle
switch is uses on conjunction with a power relay to route power to the appropriate
socket and to switch power from the two 250 watt isolation transformers. |
|
Click on Circuit Below to view PDF of Schematic |
|
 |
|
|
|
|
