> But if the amps are too high then sometimes > it can make a resistor get quite hot, I noticed. (I wondered which would= make > it hotter, by increasing the amps or increasing the volts. ) >=20 What makes the resistor hot is Watts, which is the product of Volts and Amp= s. In a given circuit, you can't increase the Amps without also increasing the Volts.=20 The Amps dial on your power supply is to limit the maximum output current, = sort of a short circuit protection. The resistance in your circuit together with= the Volts dial results in an output current. If this current goes above the Amp= s=20 dial setting (the resistance is too low or the voltage is too high), the ou= tput voltage will be reduced to keep the current below the Amps setting.=20 /Ruben =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Ruben J=F6nsson AB Liros Electronic Box 9124 200 39 Malm=F6 Sweden www.liros.se Tel +46 40142078 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .