here is the model i have for the pedal. here
I made this whole thing out of just a sewing machine pedal and some wire. it is able to solder up to 14 gauge wire. this will take about an hour to build and it will cost however much you pay for a sewing machine pedal. (there cheap). i used a broken one.
The second you make a connection between the solder and the two electrodes, it instantly sucks the solder on to the wire and will NOT come off! yes, this does have the same concept as Coldheat but is way better. you don't have to hassle over making a connection. it is also way more powerful.
By the way, those sewing machine pedals are filled with carbon plates and electrodes, dont throw them away!
Below is a video of it in action!
Step 1: Materials and tools
sewing machine pedal
16 gauge wire
alligator clips (3)
Carbon rod 9i took this from a dry cell battery)
a piece of metal
L.E.D. and its power supply
12v 4amp power supply.
*********** Before you start, you must take apart your pedal. open up the back, and you should see a concrete like block. crack that open and you will hit the mother load of carbon. you need the carbon and the spring.
Step 2: The bottom Electrode
First, place the carbon electrode in the spring. it should fit perfectly, but i don't know about other models. then, the screw that adjusts the speed needs to be placed inside the spring and then screw