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3Pcs Red NE555 DC 12V 0-10 Seconds Adjustable Delay Timer Relay Switch Module Converter Constant Current for Automotive Control System Electrical Equipment,Electromechanical Relays

Name: 3Pcs Red NE555 DC 12V 0-10 Seconds Adjustable Delay Timer Relay Switch Module Converter Constant Current for Automotive Control System Electrical Equipment,Electromechanical Relays
Brand: Jinshining
SKU: 6BC313D1
Availability: InStock
Rating: 2 (3 reviews)

*$229.00

Avaliado como 2 de 5, com baseado em 1 avaliação de cliente

(3 avaliações de clientes)

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Avaliações 3

VERSATILE APPLICATION: Perfect for automotive control systems and electrical equipment timing control
PACKAGE CONTENTS: Set of 3 red NE555 timer relay modules designed for DC 12V operation with consistent current output
ADJUSTABLE SETTINGS: Features precise timing control mechanism allowing customization of delay intervals up to 10 seconds
RELIABLE PERFORMANCE: Operates with constant current output and stable DC 12V power supply for dependable timing functions
EASY INTEGRATION: Compatible with various electrical and automotive systems through standard relay switch module interface

Informação adicional

Connector Type	Clamp
Contact Material	Aluminum
Contact Type	Normally Closed
Current Rating	1 Amps
Mounting Type	Chassis Mount

3 avaliações para 3Pcs Red NE555 DC 12V 0-10 Seconds Adjustable Delay Timer Relay Switch Module Converter Constant Current for Automotive Control System Electrical Equipment,Electromechanical Relays

Avaliação 1 de 5

Collin T – 11 de fevereiro de 2025

I was skeptical about the other review talking about this working once. I figured they didn’t understand how the timer circuit works, but they are correct. This circuit will operate a single time out of the box and then never again.

I am unsure if all the other circuits by different sellers have the same issue, but this one appears to have its capacitor and resistor backwards by design.

If you are curious about how the 555 timer works, I encourage you to go look up the different circuits you can build using one. You will notice that every application has a resistor attached to VCC and then a capacitor tied to ground. THIS hardware had the capacitor tied to VCC and the resistor tied to ground. The result is that the voltage on the trigger and threshold of the 555 timer would slowly decay and the relay would trigger. The problem is, there is no way to charge the trigger and threshold back up to VCC in order to repeat the process.

I desoldered the cap and resistor and switched their positions and was able to make the circuit behave as I expected. When power is applied, the voltage at the trigger would slowly rise until the relay would trigger. After power is removed, the voltage drops back down so the process can be repeated.

DO NOT BUY THIS unless you want a little project and desoldering isn’t a deal breaker.

NOTE: Always test your hardware before going into production. These boards should have been thrown in the trash.
Avaliação 2 de 5

Edward Farmer – 31 de março de 2025

Only a one shot use timmer. Once it is power and switches the relay it stays on from that point forward. Will not rest for a second or third times delay. Buyer beware.