where would my friend get 10 volts from? =20 -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of= Chris Roper Sent: Sunday, December 18, 2011 4:05 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] Analogue development board It needs + and - 10V so two Batteries would be needed. I am not sure if 9V = is sufficient, I will leave that up to the experts, but you cant hurt it b= y trying with 9V. Obviously the results you obtain will be different to tho= se given in the Training Manual so adjust the results appropriately. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .