Hi Luis, "Moreira, Luis A" writes: > Your circuit will not work because if you look at the datasheet for > the L293 it says the control is TTL and also when you look at the > min Vs it says it can not be lower than Vss which is 4.5V minimum. > Best Regards > Luis I edited the circuit following Your advices and here it is: http://csanyi-pal.info/album/index.php/image/view/2 or here: http://i520.photobucket.com/albums/w327/csanyipal/Bi-direct-Speed_DC_MotorControll.jpg Is it OK now? -- Regards, Paul Chany You can freely correct me in my English. http://csanyi-pal.info -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist