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| Simple DIY Linear PSU |
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| panoss:
--- Quote from: xavier60 on March 07, 2020, 12:44:58 pm ---I like to place larger areas of copper print under power resistors.` --- End quote --- Are you referring to SMD resistors? I 'm asking because through hole resistors are on the top side of the PCB, while the copper on the bottom. |
| xavier60:
--- Quote from: panoss on March 07, 2020, 02:24:45 pm --- --- Quote from: xavier60 on March 07, 2020, 12:44:58 pm ---I like to place larger areas of copper print under power resistors.` --- End quote --- Are you referring to SMD resistors? --- End quote --- No, the axial resistors for R13, R14 and R18. As well as keeping resistance low, the extra wide print helps take the heat away. |
| xavier60:
With the early version PCBs for my bench supply I was inputting unreg on one end and outputting on the opposite end of the PCB. With later versions I put the input and output close together at one end of the PCB to avoid having long tracks carrying high current across the PCB. |
| xavier60:
About R15. I picked its value out of the air. Some consideration needs to be given to its possible high dissipation. 1 watt would be a safe choice and try to keep it away from electrolytic capacitors to avoid heat degradation. |
| xavier60:
My bench supply's PCB illustrates my layout suggestions. C6 does not strictly need to be 1000uF. |
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