Xiaofan Chen wrote: > Do not use those 7805s. Use more switching DC/DC converters > and LDOs. ;-) And think sometimes about the amount of wasted energy... 1 W is 1 Nm/s. That's raising a 6 kg weight 1 m every minute. That's quite a bit :) Gerhard -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist