Electronics
Starting out, Troubleshooting Electronic Circuits, A Guide to Learning Analog Electronics,
by Ronald Quan, is a highly recommended source for the beginning hobbyist.
Here's a quick look at a power supply, AC/DC variable, at one of my work areas.
Here's a closer photo. The AC section is a voltage divider, and the DC is variable up to 24 Vdc.
A small clear plastic cover to the left, is placed over the AC input.
Another much better power supply.
Variable AC & DC.
Front, top view.
Components underneath but most behind the wood display support.
A good quality DC power supply is not that expensive.
Here's one I rely on
Capacitors used to be called condensers, the thought being electrons
would 'condense' on one plate, with a deficiency on the other.
Will
Write me at willwrtr@yahoo.com