Receiver circuit microcontroller based on Atmel ATTINY13 SMD sheath used sensor TSOP1736 receiver Reed relays used for detection. There are two versions of the transmitter control circuit based on SMD attiny24 Door Alarm project source: All hex project,... Electronics Projects, Programmed Door Alarm Circuit ATtiny24 ATtiny13 Controlled "avr project, microcontroller projects, " Date 2019/08/02