Bouncefree switch question.

[Joe Gwinn]

I think that i will use that hall effect switch on this winder. Would this swich be usable for winder? http://pdf1.alldatasheet.com/datashe...UGN3130LL.html
UGN3130.

Hall switches work well, but one still has to ensure that the duty cycle isn't too small (pulses too short at high speed) for the chosen counter.

I found the alldatasheets website to be a nuisance. A simpler source for datasheets and the corresponding application notes is the manufacturer: http://www.allegromicro.com/en/. It turns out that 3130 is discontinued, but the data sheet is still available.

[jpm83]

I found the alldatasheets website to be a nuisance. A simpler source for datasheets and the corresponding application notes is the manufacturer: http://www.allegromicro.com/en/. It turns out that 3130 is discontinued, but the data sheet is still available.

My local electronics supplier have that hall sensor and they have those TLExxxx sensors also. That would be the place where I'm going to buy my pick up parts too. Thanks for the reply.

Janne

[RedHouse]

Sure. You can either email me or send me a PM via this forum.

Done, thanks.

[John_H]

I built this switch for my old winder. I've been using a reed switch with a decade wheel that is hooked to a pedometer. It works ok, but I thought it would be a big improvement to switch it to optical. I built this from Radio Shack components for less than ten dollars.

The photo transistor triggers a reed relay. When using a calculator or pedometer you only need to close the switch to get a count, so there is no load on the relay. It should last a while. Time will tell.

I tested it with a wheel mounted in a cordless drill, and it worked fine up to 1400 rpm which was the maximum speed of the drill. I'll trim the circuit board down before I mount it to the winder. It seems like it will work well.

Simple, cheap, and no bounce.

[jpm83]

I just ordered this counter. http://www.velleman-kit.com/download...nual_k8035.pdf
What do you think is this a good choise? I think I'm going to wind mostly guitar pickups.

Janne

[RedHouse]

I just ordered this counter. http://www.velleman-kit.com/download...nual_k8035.pdf
What do you think is this a good choise? I think I'm going to wind mostly guitar pickups.

Janne

I like the ease of the Up/Down arrangement, looks like a SPDT switch will do the trick.

[Yves]

I just ordered this counter. http://www.velleman-kit.com/download...nual_k8035.pdf
What do you think is this a good choise? I think I'm going to wind mostly guitar pickups.

Janne

It seems to have the features your need for pickup winding:
- between 120 rpm and 12000 rpm: largely more than you need
- preset value: handy if you want to automatically stop the winder at some preset number of turns with the use of some relay
- 4 digits (some will argue that 5 is better, but even in the event you are going above 9999, you can still keep the 5th digit in your mind, that's not that much to remember ... OK, you will loose the preset feature thing in that case)

Just need to add a proper switch, I personnally am in favour of opto switch.

I like the ease of the Up/Down arrangement, looks like a SPDT switch will do the trick.

RedHouse: what does "SPDT" stand for ? Thanks.

[RedHouse]

...RedHouse: what does "SPDT" stand for ? Thanks.

Your kidding me right? if not, I'd be happy to explain.

It is a (old) technical term which describes a switch type regardless of it's make or configuration. It is terminlology an electrician, an electronic technician and many other folks would use to describe switches (normal folks should too really).

It is an acronym we use in the USA and UK, I imagine the European DIN spec may call it something else.

I will elaborate if you please... What would you call a normal ON/OFF switch?

I would call it a SPST switch which stands for SINGLE POLE - SINGLE THROW see the pic below:



The example at the top of the pic is a ON/OFF switch, technically it's a SINGLE POLE - SINGLE THROW switch.

The second pic is commonly referred to as a "toggle" switch because it toggles between two terminals, but technically it's really a SINGLE POLE - DOUBLE THROW switch.

The third pic is called a DOUBLE POLE - DOUBLE THROW switch. In the guitar pickup world, it it commonly used for Series/Parallel switching.



This schema can be expanded-out ...as necessary.

Hope this helps.

[Yves]

Thanks Redhouse.

I am not kidding you: sure I know what is a switch, but due to the language, I am sometimes missing things lexically speaking.

This is clearer now.

Yves.

[RedHouse]

Tres heureux de vous aider mon frere

(I hope that makes sense, I used Babel Fish to translate)