happy holiday to0..
ABSF WROTE:Did you use the sticky pad electrodes that I recommended (Made by OMRON).
What is the battery voltage?
What are the DC voltages after D1, at Pin 8 of 7555 and pin 6 of IC2?
Allen
i buy the TENS unit from lelong and modify the stickypad
im using a 9V battery btw can i change the battery to adjustable adaptor?
b4 i could check at pin8(7555) and pin6(IR2153)..,something happen(which i got no clue)..maybe a random error..
kidding on the random error but right now i got no output at the electrode...,i troubleshoot,recheck the soldering i made but got nothing..the i use led to check voltage when accidently i short cct the connection(at blue circle) to ground and there's output at the electrodes but then i need to tap again and again from this point(blue circle) to ground to get the output at the electrode...so right now im clueless
is it maybe the MTP6N60C(in red circle) that i use instead using MTP6N60E.but the connection is right and the datasheet for this 2 almost the same
MTP6N60E = #6.0A #600V #Rds=1.2ohm
MTP6N60C = #5.5A #600V #Rds=2.0ohm