And just think, bung an Arduino or similar on to that and you'd be able to= =20 measure frequency, display a fancy graph and pump the info out to mass=20 storage or a PC. Easy for some some researcher to knock up and use, providing they had the "= =20 intelligence" (humour) to realise they could do this without bothering the= =20 EE or the Bio/Pre Med types at University. Colin -- cdb, colin@btech-online.co.uk on 17/09/2011 =20 Web presence: www.btech-online.co.uk =20 =20 Hosted by: www.justhost.com.au =20 =20 This email is to be considered private if addressed to a named individual= =20 or Personnel department, and public if addressed to a blog, forum or news= =20 article. =20 =20 =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .