XINGYHENG 5Pcs 12V NE555 0-10 Seconds Delay Timer Switch Module Constant Current Regulator Timer Delay Converter for Automotive Control System Electrical Equipment

Pour ma part je n'ai pas eu de problème. Je ne fais pas passer de puissance dans le relais mais je l utilise pour fermer un circuit CAN dans un calculateur moteur après 1 seconde de mise sous tension.

It's a NE555 delay timer but it's not a constant current device as advertised. It incorporates a relay with Normally Open and Normally Closed contacts that can switch AC or DC loads isolated from the 12V supply needed to power the board.

Pretty cool little gadget with a tunable time delay from when it receives power to when it closes the relay.I used it in a Jeep Patriot to delay my amp from powering for a few seconds after the deck had finished powering up in order to avoid a loud speaker pop/thud and used some wide diameter heat shrink tubing to protect it.

This product is great quality and shipping was super quick as usual. Make sure that you understand that it its for delaying how long before, what ever you have hooked to the timer, turns on after the power has been applied to the relay module. I wasn't able to see if I could switch it to a simple "run time" timer module such that when you applied voltage the timer would operate for a set period and shut off-----it's quite the opposite.

I was excited to use these in a few projects, sadly 3 of the 5 have failed within a week. One has a faulty adjustable potentiometer so that went in the trash right away. Two others the relays simply stopped working on the NO and common side of the contacts. I haven't tested the last two but I don't expect they will miraculously be any better. The load connected to the output side was only 2 amps and these are rated to 10 amps. I have a feeling the contacts internally are just manufactured with very poor conducting material. Sometimes you get what you pay for and others times you get less. I got less.