Hey folks! I'm trying to set up a push button to control a 12V load, specifically a small water heater, using a timer relay module. My goal is to turn the heater on with a single button press for a maximum of 1 hour due to battery limitations. I've got a 12V timer relay that seems to be functioning well, and it allows for a timer or toggle mode—one press to start and another to stop if needed.
Here's where I'm getting stuck: I need help wiring my 4-pin LED push button switch. I want it set up so that pressing it triggers the relay, the button's LED lights up while the load is on, and everything resets properly when the timer expires. I also want to keep the toggle feature by pressing the button again.
I've noticed that the push button seems to connect NO1 to NO2, but also links NO1 to NO1 and NO2 to NO2. I'm a bit confused about this. I managed to get it working without connecting the push button, but once I do, it just makes a repetitive 'clac clac clac' sound and doesn't activate the load or respect the timer.
As a newbie, I'm trying to determine whether I'm wiring it incorrectly, if the button or relay is the wrong type, or if I need a different component altogether. Any wiring diagrams, ideas, or product suggestions would be hugely appreciated! Thanks a ton!
2 Answers
It sounds like you're on the right track with your setup! For the push button, the key is figuring out which pins connect when you press it. You should connect the two pins that engage the relay to the 'start' connectors on your timer module. The other two pins can be wired to the LED, which should be in parallel with your load for it to light up when the heater is powered. This way, you'll have the visual cue you need!
I think you may need to confirm if your button is a momentary switch or a latching one. If it's momentary, it should work perfectly for the timer relay. Make sure to wire the LED with a resistor to avoid burning it out when you connect it to your 12V source. Also, double-check that the timer relay is set for toggle mode if you want to turn it on and off with the same button!
Absolutely! If it’s toggle mode, it will need a momentary push to switch states, which might be why you’re hearing that ‘clac clac’ without the relay firing. Just make sure your setup is right for the mode you’re in!
Definitely check your connections using a multimeter. If NO1 connects to NO1 and NO2 connects to NO2 when pressed, that's your go-ahead to wire it. Don't forget about the polarity for the LED; it might not light up if connected the wrong way.