Door buzzer with 555
Tuesday, September 2nd, 2008I demolishes a store-room , see old loudspeaker and other equipment a little again. Then born the though builds Door Buzzer by use , IC 555. Perform sound electric bell origin. When press S1 as a result have a voice fair loud. This circuit almost must not do anything…. วงจรเสียงออดประตูหน้าบ้าน ดูวงจร Door buzzer with 555 [...]
