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Adventures in 18650 Battery tab welding

close-up-zeva

Why do we need battery tab welding? In the last few years, a lot of electric bike batteries & telsa cars if I’m not mistaken use 18650 sized lipo cells. 18650 cells weigh about 50g each and can hold anywhere up to and maybe a bit north of 13Wh per cell. Many ...

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Quick Change Tool Post Handle

dav

The quick change tool post came with a nut to set the angle of the tool post. I didn't like having to reach for a wrench every time I wanted to change the angle of the tool post. I turned up a nut, drilled and tapped a hole and put ...

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Installing a Quick Change Toolpost

dav

I got a new lathe and it didn’t come with the kind of quick change toolpost I like. To be fair it’s much better than the rocker type, but still, not state of the art. I ordered a quick change toolpost set and was pretty please when it arrived. The ...

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How to make a tasty sandwich

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This might seem a laughable article and although lighthearted , I take pride in making tasty sandwiches. I enjoy them more than most of the purchased alternatives. I also live in China where access to good bread is not always possible. This particular sandwich was made on a trip to ...

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USBAsp Pogo Pin Version

USB-Asp-Pogo

It’s been a few months since I completed the design of the mini USBAsp. I’m very happy with it. It is small and it’s not my go to programmer. What makes it very useful for me lately is the addition of pogo pins. I’ve been working on some small boards ...

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Making a LiPo Battery Pack Part 3

Battery-Assembled-FI

The last step is to insulate & pad the battery box and finally install the battery. For this step I used: Double sided tape Straight edge Scissors and/or knife Old PCBs Packing Foam Wire grommet Saw (to cut PCBs to size) Rotary Tool I started writing how this step wasn’t ...

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Making a LiPo Battery Pack – Part 2

Assembled-Pack-FI

Now that we have a crimped pack, we need to attach a battery protection board and insulate the pack from short circuits. In this step we need: Insulating Tape Insulating Cardboard (Business cards are perfect) Foam double sided tape (2mm or 3mm is fine) Soldering Equipment (Iron, Solder, Flux) Battery ...

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Making a LiPo Battery Pack – Part 1

LiPo-FI

  CAUTION Making battery packs requires your full care and attention. You are working with a lot of stored energy and pretty much all the tools you use are metal and can cause a short circuit. In a short circuit, something is going to get hot, and probably melt. Most ...

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Mini USBAsp 3D Printable Case

USBAsp-Case-Front

I made an extremely simple case for the min USBAsp. It can have a hole in the back for the buttons, but in truth I can’t see updated the firmware anytime soon, so a button for self-programming will just get in the way. I will try without the “slow” button, ...

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