I'll take a look. Can you read any number off the 16 pin chip?
What model is the supply?
What model is the supply?
fechter said:I'll take a look. Can you read any number off the 16 pin chip?
What model is the supply?
fechter said:I don't have enough of the board in the pics to be sure, but R35 looks like the one to put a pot across to lower the current.
To be sure, I need to trace the circuit back to the shunt, which I don't see in the pics.
fechter said:I don't have enough of the board in the pics to be sure, but R35 looks like the one to put a pot across to lower the current.
To be sure, I need to trace the circuit back to the shunt, which I don't see in the pics.
kje said:fechter said:I don't have enough of the board in the pics to be sure, but R35 looks like the one to put a pot across to lower the current.
To be sure, I need to trace the circuit back to the shunt, which I don't see in the pics.
Are you able to trace the circuit back to the shunt on this picture?
View attachment 2
fechter said:Sorry for the delay, yes I can trace it back to the shunt now.
R35 is the one. I can't tell what the stock value of R35 is, but you could measure it with an ohmmeter or tell from the color bands. Anyway, reducing the value of R35 should lower the current limit. You could try placing a trimmer pot across it and see what happens.
fechter said:Sorry for the delay, yes I can trace it back to the shunt now.
R35 is the one. I can't tell what the stock value of R35 is, but you could measure it with an ohmmeter or tell from the color bands. Anyway, reducing the value of R35 should lower the current limit. You could try placing a trimmer pot across it and see what happens.
MrDude_1 said:Fechter, If I lower it to 38v... do you think it could sustain the 8.3A continuously?
fechter said:Sorry for the delay, yes I can trace it back to the shunt now.
R35 is the one. I can't tell what the stock value of R35 is, but you could measure it with an ohmmeter or tell from the color bands. Anyway, reducing the value of R35 should lower the current limit. You could try placing a trimmer pot across it and see what happens.
fechter said:If the voltage isn't high enough for the pack, the current won't be at the limit, so the limiter circuit won't do anything.
Let me check which resistor will take it up.
fechter said:Oops, the picture I have of the top side doesn't show the voltage adj pot.
Yes, if that's easier. A fixed resistor will just change the range of the stock voltage adjuster.kje said:Nice. Can I do this with a 10k trimmer pot?
fechter said:Yes, if that's easier. A fixed resistor will just change the range of the stock voltage adjuster.kje said:Nice. Can I do this with a 10k trimmer pot?