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|When working with electronics, you always need one basic thing; power. This power supply is great for powering all kinds of electronic projects. It produces a well filtered, variable 1.2-30 volts at 5 amps. It is easy to build and the parts are realitively easy to find.|
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|I have made this successfully but i did some changes by using LM350T volt Regulator and 10k pot .|
|Hello again. I commented on this LM338K-based power supply. back in 2008 when I built a dual version for my G-Scale Model Railroad. It's still working great with no problems! It's great circuit. It's very stable and easily puts out 5 amps at up to 30 volts. The amperage has been checked with a DC clamp meter and suitable dummy load. Thanks again. I really like your website here, too. Regards.|
|Hello, I've never wired up anything, but as a working tattoo artist, have run across the need to. What I am looking to build is a power supply with a 3 way toggle that could run 3 separate tattoo machines, one at a time. Preferably 0-18v @ 2a. Could someone please help me come up with a parts list and wiring diagram for something like this? It would be much appreciated. Thanks in advance!|
|I want to build a power suplly inwhich 220voltage (vac) is used and variable voltage 0-----30 volts will outper(DC) and the minimum output current is 1 amp Please help me to bulid this circuit diagram I WILL BE VERY THANKFUL TO YOU.|
|I have given up trying to locate a 24V 5A transformer. they do not exist. the one with the lowest amps I can find is a 10 amp. will that be ok?|
|R2 gets super hot, and the pot get in fire. These 2 resistors are connected from the positive to the negative rails, WHY? It burns the resistor across the rails. I am sure this circuit diagram is right, as I saw it from many difference places, but why the pot burned? I am sure I have a right setup.|
|More a curiosity question than anything. The LM338 schematic shows an input voltage of greater than 28V while you have a transformer outputting 24v spec'd out. (assuming 120Vac input) ?|
|I have a couple 13.8 vdc power supplies that were used for ham radio; I'd like to build an aux. project box to use as a 1.2 to 12 vdc, 5A Variable Power Supply. If I include everything to the right of the bridge rectifier in the above circuit, am I on the right track? ... Thank you very much for your reply!|
|Hi Aarron What pin on the 2n3005 is the IN, OUT and ADJ. The data sheet for the 2n3055 does not give this kind of info. Am I to assume that the IN is the Collector, the OUT is the emitter, and the ADJ is the base. I have tried to wire this up but it is not working. I may have burn something up or have it wired up wrong. Thanks Mike|
|i cant find the exact valued elements for this circuit and pruchased a 24 V, 3Ampere transformer, 270 Ohm, 4.7 K Pot, 100uF 63Vdc Electrolytic Capacitor, 8200 uf 50 VDC Electrolytic Capacitor. actually i want 3 ampee cureent and variable 2 to 20 volts. with these element what output is expected ? Sir, please tell me ASAP.|
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