Darkness detector circuit with audio output using 555 March 31, 2015 Darkness detector circuit with audio output using 555 Posted by Marcel at 11:45 am No Responses 555 Timer Circuits, Circuit diagrams Tagged with: mosfet, sensor This darkness detector circuit beeps when the light drops below a certain level. The main elements of this circuit are the 555 integrated circuit, working as an astable multivibrator and an LDR which is used as darkness sensor. 128Shares128
