Bypass of momentary on/off switch

Thread Starter

Rob Rocca

Joined Mar 11, 2025
4
I have a dehumidifier with a momentary on/off switch. I want to bypass the on/off control and just have it turn on when the inkbird controller issues power and turn off when the inkbird controller removes power. The first pic is the on/off switch and the second pic is the back of the same board with the tracing (best pic I could get). Please help and thanks in advance. PXL_20250311_140140833~2.jpgScreenshot_20250311-145138.png
 

Thread Starter

Rob Rocca

Joined Mar 11, 2025
4
A link to this inkbird controller please.
A link to this inkbird controller please.
Hi the inkbird controller is just a temperature and humidity monitor that has 2 AC outlets that are supplied power when certain temperature and humidity parameters are met. Here is a pic of it. Basically I just plug my dehumidifier into the outlet and the inkbird sends power to the outlet turning on the dehumidifier..this is why I need to bypass the on/off push button circuit on the dehumidifier. I will attach a pic of the dehumidifier too. Thanks in advance and I hope it's not too big a modification. I don't need all the other features of the dehumidifier. I just really need it to turn on and off. Screenshot_20250312-073630.pngScreenshot_20250312-074210.png
 

sghioto

Joined Dec 31, 2017
8,633
Will need a momentary relay contact closure when the controller turns on and off power to the outlets.
Are you capable of constructing such a circuit if provided?
 
Last edited:

sghioto

Joined Dec 31, 2017
8,633
First suggestion:
Get a 12 volt DC adaptor to plug into the Ink Bird controller to power the 555 circuit.
Use this Relay for RL1.
Connect the N.O. contacts of RL1 across the ON-OFF switch on the Dehumidifier.
1741925827296.png
 
Last edited:

JohnSan

Joined Sep 15, 2018
121
You might be able to achieve it really simply.

If you conduct a test:-
Hold the button pressed and turn on the power to the de-humidifyer.

Does it run?

If 'yes', then just short the switch out. Problem solved.

If 'no', you may have to use a circuit like already suggested.
 

Thread Starter

Rob Rocca

Joined Mar 11, 2025
4
You might be able to achieve it really simply.

If you conduct a test:-
Hold the button pressed and turn on the power to the de-humidifyer.

Does it run?

If 'yes', then just short the switch out. Problem solved.

If 'no', you may have to use a circuit like already suggested.
I am going to try that tomorrow. Thanks so much.
 
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