Homemade regenerative tube radio

July 13, 2009 By 24 Comments

home made tube radio

There are no microcontrollers in this project. In fact you wont find a single transistor. This classic regenerative tube radio, modeled after an early 20th century homebrew is complete with schematic and additional photos. For those who are not familiar with tube designs and for simplicity, the regeneration circuit can be thought of as feedback though this relation may … Read the rest

Filed Under: home entertainment hacks, misc hacks, wireless hacks Tagged With: , , , , ,

Regenerative bike brakes

September 4, 2008 By 20 Comments

For their senior design project at Arizona State University, these guys built a regenerative braking system for their bike. As they brake, the system spools up to give them a push back up to speed.  They achieved 25% efficiency on one run, which isn’t too shabby.

The site has all kinds of information. You can check out their different plans … Read the rest

Filed Under: classic hacks, misc hacks, news, transportation hacks Tagged With: , , , ,