Another take on using ‘dead’ batteries

Here’s another circuit that can be used to squeeze the remaining potential from supposedly dead batteries. Just like the AASaver, we see this as a useful prototyping tool, providing juice for a breadboard even though it’s not reliable enough for long-term use (the batteries are just about through after all). First off, the image above [...]

 
Most read Gadget Master posts in February

Sponsored by Digi-Key Gadget Master features cool, homemade electronic gadgets proudly brought to us–by you! Complete with build instructions for the design engineer who likes the silly side of inventing things and enjoys building stuff in his and her spare time, these gadgets range from highly silly and impractical to extraordinarily inspirational for your own [...]

 
New extruder 3D prints tasty treats using chocolate

If you’ve never felt at home with a piping bag in your hands this chocolate extruder will come to your rescue. It can replace the plastic extruder head on your 3D printer (RepRap, Makerbot, most 3-axis CNC machines, etc.), letting you turn your digital creations into decadent reality. The head uses a progressive cavity pump to feed the [...]

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