555 Timer Circuits The 555 timer is a simple integrated circuit that can be used to make many different electronic circuits. With this information you will learn how how the 555 works and will have the experience to build some of the circuits below. 1 to 15 Minute Timer Circuit Diagram, Working and Applications May 01, 2019The above circuit diagram is for the 1-minute timer circuit. For 5 min, 10 min and 15 min you just have to change the resistor value (R 1). 1 Minute Timer Circuit: We have to configure 555 Timer in Mono-Stable mode to build a timer. The 555 Timer starts timing when switched ON. After one minute of time duration, the LED will automatically turn ON. Related searches for ppm circuit diagram using 555 timer 555 timer circuits pdfbasic 555 timer circuits555 timer schematic diagram555 timer circuits projects555 timer block diagram555 timer circuits applications555 timer pinout diagram555 timer circuit explanation