Any electrical boffins here

[HDC83]

Hi I’m trying to remotely actuate my extractor it’s a 110v dewalt dwv901 as my previous post-https://www.ukworkshop.co.uk/threads/power-take-off-via-remote.128104/
I’m trying a different approach now and need someone in the know to see if my schematic will work.
Delay switch-

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www.amazon.co.uk

Current sensor switch-

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www.amazon.co.uk

Remote switch-

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www.amazon.co.uk

Solid state relay-

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www.amazon.co.uk

 

[MJP]

Haven't looked at the rest of the circuit but isn't the 110V live feed to the 12VDC power supply missing?

Martin.

 

[HDC83]

So it is, it definitely wouldn’t work lol
I’ve updated it now

 

[Spectric]

Hi

Your 110 to 12 volt transformer will output Ac not Dc! Is this a transformer or a Psu?

 

[Spectric]

Another point, if that is a PSU then I would suggest the output is 0 & + 12 volts not a - 12 to +12 volt supply.

 

[HDC83]

I was thinking a 12v driver of some sort would be suitable

 

[HDC83]

Like this one

DC 12V 5A to 50A Amp 110V 220V Power Supply LED Strip Light 12V - AC 110 - 220 | eBay

Applications 5050 3528 5630 7020 2835 3014 LED Strip Light. - GND: DC power output "-". - V: DC power output "+". - 100% full load burn-in test. All other item shown for illustative purpose. Connection: - L, N: AC power input.

www.ebay.co.uk

 

[mikej460]

Just an aside, have you considered remote switch sockets where you use a fob remote to switch one of several sockets? Here's an example but you need to check the amp rating against that of the extractor. You can buy single sockets or multi packs like this one. DEWENWILS Remote Control Plug Socket, 13A/3120W Heavy Duty Wireless Light Switch, 30m/100ft Long Range, Programmable, CE and RoHS Listed, 3 Pack Sockets and 1 Remote: Amazon.co.uk: DIY & Tools

 

[HDC83]

I have a remote switch for the extractor. It has a power take off socket. To use either I have to manually turn the switch on the extractor it’s a pain as there usually something in front of it. So that brings me to make this arrangement so I can have best of both worlds that would increase my workflow.

 

[NetBlindPaul]

Three questions.
Why bother with the solid state relay?
Why not use an ordinary relay?
Looking at the 110V being used, are you using this in a business?

 

[gmgmgm]

It's been written about before - but why not use a smart switch? You can get wifi switches which work at 110V (quick 10A example on amazon, not a recommendation per-se) and this plus an Alexa device will be much easier in the workshop. Assuming you have wifi!

Nothing wrong with using relays etc, but it seems like a good chance to make a bigger step forward?

 

[HamsterJam]

I don’t think it will work as intended.
I assume you intended the delay timer to provide an overrun so the extraction stops a short while after the tool.
Looking at the circuit it appears the delay timer only has a power feed when either the current sensor is active or the remote switch is on. If neither are active, there is no power to the delay timer and the extraction will stop immediately.
I would expect any overrun delay switch to have switched input to act as a trigger plus a permanent live to draw power from after the trigger is removed.

 

[NetBlindPaul]

Looking at the circuit following the comments from HamsterJam, I believe that is an on delay timer or a pulse timer, when the power is removed it will switch the output off.
You need to look at an alternative.

 

[Nelly111s]

Use a stick to push the button?

 

[HDC83]

Three questions.
Why bother with the solid state relay?
Why not use an ordinary relay?
Looking at the 110V being used, are you using this in a business?

What ordinary relay would you suggest?
I work on site most of time and requires 110v tools

 

[HDC83]

Use a stick to push the button?

Shame it’s a rotary switch

 

[HDC83]

I don’t think it will work as intended.
I assume you intended the delay timer to provide an overrun so the extraction stops a short while after the tool.
Looking at the circuit it appears the delay timer only has a power feed when either the current sensor is active or the remote switch is on. If neither are active, there is no power to the delay timer and the extraction will stop immediately.
I would expect any overrun delay switch to have switched input to act as a trigger plus a permanent live to draw power from after the trigger is removed.

Yes that what I want it to do. Your right I see the problem permanent live to + and switch input to common only

 

[HDC83]

It's been written about before - but why not use a smart switch? You can get wifi switches which work at 110V (quick 10A example on amazon, not a recommendation per-se) and this plus an Alexa device will be much easier in the workshop. Assuming you have wifi!

Nothing wrong with using relays etc, but it seems like a good chance to make a bigger step forward?

I have it set up with a remote like this one

Wireless Remote Control Switches AC100V - 240V 30A/3000W Relay Wide | eBay

Wireless RF signal can pass through walls, floors, doors or windows. Modulation Mode: ASK. RF Working Mode: Superheterodyne Receiver.

www.ebay.co.uk

But I would like the remote and auto functions to work together without going anywhere near the extractor.

 

[Nelly111s]

The other low-tech solution I've seen is a bathroom pull-chord switch (was actually mounted so that the chord was horizontal not vertical) to switch the extractor on. Just need to be sure of the switch rating. Then the switch is next to the extractor, chord is whoever you want. Logistics may dictate that this won't work, but it's a thought.

 

[HamsterJam]

Yes that what I want it to do. Your right I see the problem permanent live to + and switch input to common only

Had a better look this evening and agree with NetBlindPaul - I don’t think you have the right timer module there.
You will need one that has a power connection permanently connected to your 12v PSU plus a separate trigger input that will cause the output relay to energise all the time the triggers signal is present. The delay timer should start when the trigger signal is removed and de-energise the relay after the preset time.
Not quite sure how you envisaged the remote function working but assuming it is so you can manually start the extraction without a tool running, I suggest it just needs wiring into the solid state relay bypassing the overrun. If you need the overrun when using the remote start, then it will need to activate the trigger on the time delay module in the same way as the current sensor.
Finally, make sure your solid state relay is OK for the big inductive load the motor in your extractor will almost certainly impose on it.