Electronic Projects without MCU

It's an archive of electronic projects.
There are simple circuits, but useful.

Picture	Title
	PIR Alarm Sensor: IR Output: Relay x1
	Digital Clock Using Logic Gates Display: 7-Segment x6
	RFID Code Lock with 125KHz Tag Output: Relay x1
	Single Phase Dimmer Output: 220V/AC Reverse engineering Simulation in LTspice
	Gas Leak Detector or Fire Alarm Sensor: MQx Gas Sensors
	Gas Leak Detector or Fire Alarm Sensor: MQx Gas Sensors
	Night Light Sensor: LDR Output: Relay x1
	1CH Relay Controller with Laser Pointer Sensor: LDR x2 Output: Relay x1
	Relay Remote Controller, RF, ASK, FixCode, 2CH, Model2 RF: ASK Encoder: FixCode, PT2262 Output: Relay x2
	Relay Remote Controller, RF, ASK, FixCode, 2CH, Model1 RF: ASK Encoder: FixCode, PT2262 Output: Relay x2
	Relay Remote Controller, RF, ASK, FixCode, 4CH RF: ASK Encoder: FixCode, PT2262 Output: Relay x4
	Relay Remote Controller, RF, ASK, FixCode, 6CH RF: ASK Encoder: FixCode, PT2262 Output: Relay x6
	220V AC Voltage Protection Reverse Engineering Simulation in LTspice