Transformer Bobbin Turns Counter

speakerman · 27th July 2010, 04:01 PM

Does anybody have any suggestions for buying a commercial Turns Counter (to 5 digits) or how to build one myself? Thanks for your responses.

bob91343 · 27th July 2010, 07:32 PM

How permanent a unit do you want? Or is it for one use?

You can buy turns counting dials. Try MFJ in Mississippi for starters.

You can set up a rotating magnet/coil assembly with an electronic counter.

jlsem · 08:33 PM

The easiest and cheapest way is to rig a mechanical plunger that keys the = button of a cheap calculator after you've entered 1+1. I personally use a Veeder-Root mechanical counter actuated by a cam on the rotating shaft. For extra fanciness I added a small ball bearing to the lever on the counter.

http://cgi.ebay.com/SALE-VEEDER-ROOT...#ht_500wt_1154

John

Steerpike · 27th July 2010, 10:09 PM

I use an ICM7217 chip & 7-seg display to wind transformers on my lathe. It took a bit of soldering to put it all together on strip board.
The trigger can be a reed switch actuated by a tiny magnet on the chuck.

The caclulator trick is much quicker! You could again solder a reed switch across the necessary keypad contacts.

mickeymoose · 31st July 2010, 08:43 PM

Speakerman: Please do not double-post! E

speakerman · 1st August 2010, 02:36 AM

Sorry, Mickeymoose/E. I am relatively new to blogging and did not mean to do inappropritate entries. I wanted to reach as many people as possible in different categories; I assume that is what you mean by "double-posting". Will not do so again. Thank you for the heads-up.

Thank you to those who have responded with advise, it is greatly appreciated. I will check your suggestions out.

speakerman · 13th August 2010, 03:50 AM

Hi, Guys -

Found a great site by Gerry Walterscheid Jr., check it out:
The Engineer's Notebook: Universal Coil Winder

I am going to attempt a motorized version.

27th July 2010, 04:01 PM	#1
speakerman diyAudio Member Join Date: Mar 2010	Transformer Bobbin Turns Counter Does anybody have any suggestions for buying a commercial Turns Counter (to 5 digits) or how to build one myself? Thanks for your responses.

27th July 2010, 08:31 PM	#3
jlsem diyAudio Member Join Date: Jun 2003 Location: Dallas,TX	The easiest and cheapest way is to rig a mechanical plunger that keys the = button of a cheap calculator after you've entered 1+1. I personally use a Veeder-Root mechanical counter actuated by a cam on the rotating shaft. For extra fanciness I added a small ball bearing to the lever on the counter. http://cgi.ebay.com/SALE-VEEDER-ROOT...#ht_500wt_1154 John Last edited by jlsem; 27th July 2010 at 08:33 PM.

27th July 2010, 10:09 PM	#4
Steerpike diyAudio Member Join Date: Jan 2006 Location: Johannesburg, South Africa	I use an ICM7217 chip & 7-seg display to wind transformers on my lathe. It took a bit of soldering to put it all together on strip board. The trigger can be a reed switch actuated by a tiny magnet on the chuck. The caclulator trick is much quicker! You could again solder a reed switch across the necessary keypad contacts. __________________ Steerpike's Toybox

1st August 2010, 02:36 AM	#6
speakerman diyAudio Member Join Date: Mar 2010	Reply to postings Sorry, Mickeymoose/E. I am relatively new to blogging and did not mean to do inappropritate entries. I wanted to reach as many people as possible in different categories; I assume that is what you mean by "double-posting". Will not do so again. Thank you for the heads-up. Thank you to those who have responded with advise, it is greatly appreciated. I will check your suggestions out.

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27th July 2010, 07:32 PM	#2
bob91343 diyAudio Member Join Date: Mar 2010	How permanent a unit do you want? Or is it for one use? You can buy turns counting dials. Try MFJ in Mississippi for starters. You can set up a rotating magnet/coil assembly with an electronic counter.

31st July 2010, 08:43 PM	#5
mickeymoose diyAudio Member Join Date: Nov 2008	Speakerman: Please do not double-post! E

13th August 2010, 03:50 AM	#7
speakerman diyAudio Member Join Date: Mar 2010	Hi, Guys - Found a great site by Gerry Walterscheid Jr., check it out: The Engineer's Notebook: Universal Coil Winder I am going to attempt a motorized version.

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