NE555 delay relay module monostable switch delay power-on Switch 5v 12V automotive electrical appliances

[Brief Explanation]

1、 Size: 6.8CM * 2.1CM

2、 Main chip: NE555

3、 Working voltage: 12V DC

4、 Characteristics:
1. Connect the power relay and delay the closing.Specifically, after supplying a 12V power supply to the relay, the relay will not draw and the output state of the relay is: normally open and disconnected from the common, normally closed and conductive to the common; After a delay of 1-10 seconds (adjustable), the relay will draw and connect. At this point, the output terminal of the relay will be in the following state: normally open and connected to the common, normally closed and disconnected from the common; As long as the module is continuously powered on, this state will remain.
2. The delay time is adjustable, ranging from 0 to 10 seconds
4. Adding a potentiometer can increase the delay time
5. Increasing capacitor C1 can increase the delay time
6. Equipped with an input power indicator light
7. Equipped with relay engagement indicator light

eightCan control equipment with AC voltage below 220V/10A. (Control equipment 2000W)

nineEquipped with relay continuous current protection.

tenDelay time formula: T=1.1RC. For example: capacitor 100uf, resistor 100K T=1.1 * 100000 * 0.0001=11 seconds

【 Applicable occasions 】

1. The delayed connection of onboard equipment can cause excessive current to burn out the onboard equipment when the car is ignited.

2. In situations where sequential startup is required, multiple devices starting simultaneously may cause excessive current and burn out electrical appliances.