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Unregulated lm2596

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conducteur:
I have troubles with my lm2596 power supply. I have this circuit on a pcb and it doesn’t work. Tried different inductors, two types of diodes,... I soldered the components together with a few wires to know if there’s a problem with my pcb...  but the output voltage is also just below the supply voltage...
 
Output C = 680uF en load =39 OHM

thinkfat:
You mixed up pin 1 and 2.

EDIT: but it's really hard to see with the tangled mess you have created there.

mariush:
you're dealing with a switching power supply IC, running at 50-100kHz ... at the very least put it on a prototyping board.
It won't work right with wires floating like that.

conducteur:
 Thank you very much thinkfat! I made that mistake when creating the symbol for this part in EAGLE and used my schematic as a reference (bad idea when you're troubleshooting such problems).... Could search this circuit for hours to find that one!  |O Now I have to find out if I can mod the PCB...

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