Hey,
I'm designing a negative LCD bias with the MC34063. I have yet to find an easy way to get hold of a current sense resistor, of 0.22 to 1 ohm. I opened up a car phone charger, and that used the same chip, but no low ohmic resistors in sight, instead I tihnk they used a PCB track 'made' of solder, or at least they covered it in solder to increase its current capability. Anyone know if I really need this resistor? or where I can get hold of one/substitute with something else?
Cheers,
Blueteeth
I'm designing a negative LCD bias with the MC34063. I have yet to find an easy way to get hold of a current sense resistor, of 0.22 to 1 ohm. I opened up a car phone charger, and that used the same chip, but no low ohmic resistors in sight, instead I tihnk they used a PCB track 'made' of solder, or at least they covered it in solder to increase its current capability. Anyone know if I really need this resistor? or where I can get hold of one/substitute with something else?
Cheers,
Blueteeth