Scott, > Given R1 and R2, where R1 is the "top" resistor, Vout = Vin * (R1+R2)/R2 > Are you sure ? My maths are really poor, but the following seems to make more sense : Vout = Vin / (R1+R2)/R2 For instance, by using 2 Rs of 50K each, then Vin is divided by 2... Am I missing something ? Thanks, JB