Hi, I programmed a Pic 16C84 on one of those DIY Programmers. I tried to reprogramme the same but I am unable to. Would be obliged if I could get to know if the 16C84 is a OTP. Thanks, Rajnish ****************************************************** Rajnish Nischal HVAC Controls & Instruments CHALLENGER'S, 18,DSIDC Sch - I, challengers@technologist.com Okhla Ind - II, rajnischal@hotmail.com New Delhi, Tel : 91-011-6929396 India. 110020 Fax : 91-011-6942222 *******************************************************