See how to make your own Spot Welder. Handy if you are making battery packs with 18650 lithium ion batteries. I use a timer to control how much time current is passed through the welding pen and make a handheld momentary trigger to control the electronics. This welder is deisgned to work with automotive or garden 12V batteries and is easy to put together and use!

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Link to Welder electrical schematic https://bit.ly/2WJziPo

Below are affiliate links to parts I used in this project:
Starter Relay: https://amzn.to/3bC5ZEX
Timer Circuit: https://amzn.to/2S5277u
8 Gauge Cable https://amzn.to/3awOGDL
Terminal lugs https://amzn.to/3bw7Z1k
Momentary Switch https://amzn.to/3aEcci5

You can read the written version of this article here: https://bit.ly/2Wp1EzJ

Complete Instructions on the Drok Time Delay Module:    • Programmable triggered timing board 3...  

Closeup Wiring #1 https://bit.ly/2MVl7Cy
Closeup Wiring #2 https://bit.ly/2HIqS7i

Here's a correction provided by a viewer. I should know better considering I've been in IT for over 40 years:
0.01s = 10ms = 1/100s
0.001s = 1ms = 1/1000s

#batterypack
#lithiumionbattery
#spotwelder

0:00 Introduction
0:23 Materials Used in Project
1:46 Mounting the Relay and Timer Circuit
2:06 Crimping the lugs and connectors
3:47 Making a Trigger
6:02 Wiring the Timing Board
7:45 Programming the Timing Circuit Board
8:54 Wiring Diagram Schematic
9:08 Overview of the Wiring
10:45 Testing the Spot Welder
12:37 Wrapup