>-----Original Message----- >From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] >Sent: 12 August 2005 14:17 >To: piclist@mit.edu >Subject: [EE]: Homebrew resistance welder > > >Hi folks, > A while ago I mentioned that I was working on a homebrew >resistance welder... I've built a quick-hack version up today, >sans controller board (still can't get the damn thing working) >to weld some nickel tabs onto lithium coin cells. > Photos online at >if anyone's interested. All it consists of is a bunch of >Cornell-Dubilier computer-grade electrolytics, and an >International Rectifier SCR (which now has a chunk of metal >blasted out of the can after a minor incident involving >slipping with the -ve electrode). One channel of the PSU is >used to charge the caps, the other is used to fire the SCR. > > Comments welcome, both good and bad. :) I'm very interested in this Phil, could you give a few more details such as total capacitance and the voltage the caps are charged to? How strong/repeatable are the welded tabs? Regards Mike ======================================================================= This e-mail is intended for the person it is addressed to only. The information contained in it may be confidential and/or protected by law. If you are not the intended recipient of this message, you must not make any use of this information, or copy or show it to any person. Please contact us immediately to tell us that you have received this e-mail, and return the original to us. Any use, forwarding, printing or copying of this message is strictly prohibited. No part of this message can be considered a request for goods or services. ======================================================================= -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist