It's inevitable that there will be failed pledges at the end of your Kickstarter campaign. Kickstarter automaticaly alerts backers about the failed pledge and provides info on how to fix. You must take it a step further by messaging the backers and providing instructions. I also made a video that makes it easier for them to see how to do it.

Here's the message I send out to backers who have failed pledges. There are only 7 day...

This CNC controller conversion to a Centroid Acorn was documented in a Google Doc that is publically published and automatically updated as information is added. Take a look at the full document here.

Resin 3D printers have a much higher resolution than most other 3D printing technologies, especially the desktop FDM printers. The downside is that most of the standard resins are brittle. There are several companies developing much stronger "open" (can be used with most printers) resins that rival the strength of FDM printable materials.

Siraya Blu

This material is very strong, but fractures under bending loads rather than defo...

UPDATE: 

This is the pump I ended up buying, and it is amazing. Freein Triple Action Hand Pump

The triple action works great, easy to use, and makes pumping very fast.

In combination with this Ryobi 18V Inflator I can inflate the paddle board in record time. I let the Ryobi 18V battery powered inflator fill the board with air, and then start at stage 2 of the triple action pump. The Ryobi 18V inflator is also good for quickly def...

After weeks of trying on and off to upgrade one of the Dell Precision T3600 computers in our office from Windows 7 to Windows 10, I finally found the problem an

How to build a dust collection shoe for the Tormach CNC milling machine, and other (bridgeport style) machines that have a similiar style spindle.

I'm assembling a camera rig for shooting video using the iPhone (or Android smartphone), and need dual channel (stereo) mic inputs. By default, the audio jack on these phones is 2 channel out, one channel in (TRRS type connector). So it's only possible to have mono input if using the headphone jack. Therefore, the only way to get stereo input is to use the digital input, Lightening or Micro USB connector, on the phones.

I've fo...

The AGM house batteries in my Sprinter based RV are starting to perform very poorly. It's time for an upgrade, and I don't want to go the AGM lead acid route again. I've been keeping an eye out on LiFePO4 batteries because 4 cells in series works well with a standard 12V DC system.

An ebay seller had an interesting packaging for a 12V 100Ah pack. He was putting them into metal ammo boxes PA-19, and including a balancer and a...

Here is an instructional video on where to find, and how to fill out a project survey on Kickstarter.