Report Audioguru FM Tx in Theory articles Posted August 23, 2006 audioguru am building ur fm project but still i coundt get LM2903 so i think it use to make the supply voltage stable when the battry getting down ? so can i try with out LM2903 but with the new battry for instant ? and what should i do with that capacitors they are in parrallal to use LM2903 . please tell me the correction to get full working of ur Fm with out LM2903 . thanks again ohh ...my bad ..Sorry audioguru i i thoght i typed LM2931 . ( then the above post corrected instady of LM2903 just placed LM2931 ) . still i dont think i can get what u told me 78L05 or 7805 i will try to get one .but is there any way to use ur Fm with out voltage regulator ?