![]() Also the output of station supply may be shorted if some other device fails. ![]() This is a distinct possibility if using jumpers to attach it to the power supply. Diodes are included to protect the regulator from damage in case the input is accidentally shorted to ground. I chose one that illustrated variable output and included protection diodes. LM338's Data Sheet has several very helpful application notes and circuits. It began as a variable power supply based on an LM338 5A voltage regulator and external power adapter. Or 8 x MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 16 x 1N5401 (1N5408) diodes.Ĭ2 four times 4700uF/50v or one 22000uF/50vĪfter many years of employing this ugly and clumsy bench power supply, I decided it was time to build something better, smaller and nice looking. Or eight BYW29 8 amp diodes (TO220 pinning cooled) Remember to isolate the 2N3055 transistors from the chassis/radiator! Use a radiator (heat sink) of appropriate size and surface area insulating and heat-conducting spacer or at least a thin mica hot adhesive and thermal paste.ĭ1.D4= Bridge rectifier MB2504 (25 amps cooled) ![]() Or you could use eight BYW29 8 amp diodes (TO220 pinning) mounted on a heat sink. So no delay do to the discharge of C2, and so preventing output voltages from not return to zero immediately.Ī MB2504 is used as it is a 25 ampere rectifier bridge which also should be cooled. The relay is used to switch off the power supply voltage when the mains (S1) are/is switched off. S2 switches between +- 3 Amps and full output current ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |