Strobe complete and working - sort of !!

fj

Apprentice elf
Joined
May 7, 2010
Messages
89
hi,

i'ev completed a strobe (fully populated board with 2 wires, pins 2 / 4 jumpered) powered from a 5V switch mode power supply.

the strobe works and pulses as expected BUT the LED itself never goes off completely between cycles, it always stays on at about 1/3 brightness until it has to strobe at which time it becomes full brightness.

any ideas on where to look for the problem?

thanks, fj
 

fj

Apprentice elf
Joined
May 7, 2010
Messages
89
i checked the board for bridges but couldn't see any, but afer looking at these tiny parts for so long today i might have missed something so i'll check again tomorrow. and take some pics to post up too.
 
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