Electronics Forum | Wed Feb 07 08:41:10 EST 2001 | dliechti
I have to design a power supply which converts 220V AC into 5V smothed DC. It has to be very small, so it shouldn't have a big transformer. Has somebody a scheme of a circuit? Thanks
Electronics Forum | Sat Jul 24 06:00:50 EDT 2004 | zlatkon
I need to build regulated power supply 0-30V 0-20 Amps. The only solution possible for minimizing the thermal loss is to use triacs on the secondary Trafo side in order to cut the sine for low voltage output and great current. (like 5V, 20A). Please
Electronics Forum | Fri Sep 05 13:33:28 EDT 2008 | jmiller
We are having problems with relay package seals cracking and moisture intrusion in power relays on thru-hole assemblies. we use a few different brands of thru-hole relays, we are using a sn-pb process right now and just going to lead-free. the contra
Electronics Forum | Mon Sep 08 08:59:45 EDT 2008 | davef
You're correct: * Sealed relays should not be cracked or have moisture intrusion. * Hand soldering relays is going to be expensive. [Using a mini-solder pot for this might reduce some of the burden.] The good part is that the problem is gross enough
Electronics Forum | Mon Jan 25 17:13:53 EST 2010 | bing007
I am working on a vcd 8 with a problem of loosing the 5 volts supply. We have fitted a new supply that also provides the 15 volts. When we remove the connector on the power chassis for the 5 volts the power supply shows OK. When fitted the 5 volts is
Electronics Forum | Mon Jan 06 05:53:47 EST 2020 | richardcargill
First switch on after the holidays and this year it's the Dek265 playing up. On switch on, the screen comes up with "motor comms failure, card 0 axis123 " . On looking at the cards there seems to be a power feed missing ( see attached pict
Electronics Forum | Tue Nov 29 11:45:35 EST 2016 | ttheis
I was able to repair the original power supply for the printer again with parts from another similar power supply on ebay. At first the machine didn't power up properly even though the supply voltages were all good on a volt meter when tested befor
Electronics Forum | Thu Dec 01 13:35:21 EST 2016 | ttheis
I decided to replace the psu with three din supplies since it was a repeatable issue with the 5v rail. Machine is back in operation now with no signs of problems.
Electronics Forum | Wed Nov 30 20:43:06 EST 2016 | ttheis
OK, so went to power up again today and had the same kind of issues. The 24V and 5V lights on the cage flicker dimly about every 500ms. I tried my trick of disconnecting the +24v lead to the lift table amp and it acted the same, so it didn't work th
Electronics Forum | Tue Jun 27 13:38:35 EDT 2006 | ChrisG
Stephen has a good point. You could buy a used oven. I know of several used ones that are completely refurbished for about 15-25K. But these are BTU P-70's and P-98's. The main problem here is frequency. Most of their ovens operate at 50 or 60
