Just buy one!
Alfredo, not to disappoint you, however, by the time you buy all the stuff you need to build the power supply, you will have spent at about $165.00
(unless you may already have some of the items).
Analog Volt Meter: $15.00 - $20.00
Analog Amp Meter: $15.00 - $20.00
Rheostat (large wire wound type) $35.00 (could be more however)
6V high capacity GellCell $40.00 - $60.00
Battery Charger (if you do not have one) $25.00 - $35.00
Enclosure for meters and rheostat: $15.00
Plus your time and frustration factor (looking for/buying all the items).
Also, you will not have the fine control when doing small items because of the resolution of the Analog meters (usually on the $15.00 type meters they are 0-12Vdc and 0-10Amps). Kind of hard to read 1.75V @ 100Ma. on those type meters.
In other words, buy the Caswell 20A CC/CV power supply ($300.00) and you will have everything you need.
Over the many years of my life I have found that sometimes the old "I'll just make it myself" is not an economic and smart choice.
Just my .02
George W.
|