Werner Terreblanche wrote: snip What would you recommend or not recommend? Is it > feasible to run a 5V based circuit from a 20 - 2.4V supply with dc > to dc conversion, or is it not recommended? What sort of current do you require and is it constant What efficiency do you need and is this a major factor -- Peter Cousens email: peter@cousens.her.forthnet.gr phone: + 3081 324450, 380534 snailmail: Folia, Agia Fotini, Karteros, Heraklion Crete, Greece.