For our 17V pumps with speed control, I’d like to create a very simple board that generates the required 5V signal from a 12V input. So the board will just be a voltage regulator, potmeter and connectors.
I’d like a make it possible for this knob to be panel mounted, so I am looking for a potmeter + knob combo that would work well in a brewing panel or stainless table. Similar to a knob on an audio receiver.
Can someone recommend a nice potmeter and knob for this?
It might be a better idea to specify the potentiometer and allow the end user to choose the knob to match the style of their panel. Most potentiometers have a 1/4" (6.35mm) shaft, and there are many knobs to choose from. It really depends on what is available locally.
You could take a look at DealExtreme for cheap potentiometers and knobs from China.
Thanks for the suggestions. I think though that it would be nicer to have a bigger knob than something that is 1cm diameter like these.
I want a potmeter that I can mount onto a PCB with voltage regulator and connectors for pump and power supply, so it is really plug and play. I don’t want to do it in a way that you still have to solder wires to it yourself.
I am thinking something like this, but maybe with a bit longer shaft and thread.
I probably won’t buy the potmeters from China, as the taper in a potmeter is fragile for this part I only trust a good brand. You don’t want your pump to stop during a mash, so high quality parts are required.
But, Farnell have a huge range to choose from. Again, you could offer your module with or without a knob and the customer could choose to get their own.
The
simplest circuit to do this is a potentiometer, in series with a single
resistor.
What kind
of resistance can assemble?
The result
of my calculation is 8 ohm of resistance and 18 WATS to pass from 17 V to 5 v, taking
into account that the maxim consumption of the bomb is 25 WATS.
The new pumps arrived. I tested one this weekend and it performed very well. So I’ll add them to the store ASAP.
I’m currently working with a supplier for DIN rail power supplies for the pumps, so I can hopefully add those to the store too so you can buy them in one go.
