Hi! How about these: Several sizes and powers. They are not 12V, but I think it will be hard to beat the price, and I have a 100W one and it works really well. Unfortunately they are 220V, so probably you will need a transformer in North America. Best regards, Isaac Em 9/3/2013 18:15, veegee escreveu: > Hi all, > > I want to make a cheap, small solder pot for tinning the tips of > stranded wire. > > Specifications: > > * Power supply: It will run off of a 12V DC computer power supply > because those things can supply 200+W easily and I don't like to play > with high voltages. I also have many of them. Too many. > > * Volume of solder: ~10-20mL. Doesn't really matter. > > * Temperature controlled. A power MOSFET and a microcontroller will be > used to switch the heating element. > > 1. What is a good container material for the solder? How about a small > segment of copper pipe from the hardware store with one end sealed off > with high temperature tape or something. This needs to be a safe > material for indoor use, that doesn't emit anything like poisonous fumes > when kept at 200 - 400 degrees C. > > 2. Is NiCr wire for the heating element a good fit for this application? > It would need to be the electrically insulated type so it can be wrapped > around the copper pipe. > > 3. What's the best way to measure temperature? Thermocouple? Preferably, > the probe should be sitting in the liquid solder itself. > > Any hints/tips/comments? --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .