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 | Fri Feb 18 21:34:36 EST 2000 | gwen
We always have big power modules on the board,they are very heavy,so we use the screw to fix the soldered module,then we destroyed the solder joints.If we screw them first, the board can't be wave soldered. My questions: whether we should use the s
Electronics Forum | Fri Feb 18 21:34:36 EST 2000 | gwen
We always have big power modules on the board,they are very heavy,so we use the screw to fix the soldered module,then we destroyed the solder joints.If we screw them first, the board can't be wave soldered. My questions: whether we should use the s
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 | Tue Feb 22 04:29:29 EST 2000 | Gwen Z
First I apologize for my poor English writing. we have no heat sink fins and active cooling with power module. when the board is transported,the vibration of board and power module will shotten the solder joint lifetime. if we just solder it withou
Electronics Forum | Tue Feb 22 04:29:29 EST 2000 | Gwen Z
First I apologize for my poor English writing. we have no heat sink fins and active cooling with power module. when the board is transported,the vibration of board and power module will shotten the solder joint lifetime. if we just solder it withou
Electronics Forum | Sat Feb 19 05:07:28 EST 2000 | Dean
I'm not exactly sure of your problem...but I'll give it a shot. I assume the screw is on the solder side of the board. If you wave solder the screw the head will fill in with solder. Try a water solouble mask or peelable laytex mask over the screw
Electronics Forum | Sat Feb 19 05:07:28 EST 2000 | Dean
I'm not exactly sure of your problem...but I'll give it a shot. I assume the screw is on the solder side of the board. If you wave solder the screw the head will fill in with solder. Try a water solouble mask or peelable laytex mask over the screw
Electronics Forum | Wed Nov 01 23:59:23 EDT 2017 | lkdhde1
F5HM power supply unit 00375503-02,consion document which I have is not suitable since this is new power supply unit, want to find out suitable document
Electronics Forum | Fri Jan 29 10:53:13 EST 2010 | jeffharley
There are pots on the board in the power supply to adjust the voltages after the machine is powered up. The location of these pots are in the munual supplied with the machine
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