Josh @ imsolidstate.com describes how he converted a volley charger to  place welder. This place welder has digital transact lap and modern guard to precise transact the welding guide. Source constitution and schematics are available on the dovetail beneath.
The LM21305 is an alterable frequency synchronous buck regulator capable of delivering up to 5A of continuous output existing. Input voltage is 3V to 18V and output voltage is alterable to gamut 0.6V to 5V. Switching frequency is also alterable via a single resistor from  300 kHz to 1.5 MHz. Visit the interlock for additional info / datasheet.
Guilherme Martins @ lab.guilhermemartins.entangle writes
Since I started with robotics, that I felt the need of having a board where I could directly plug-in my motors, servos, sensors and all the surfeit without having to purchase any shield, or building pcb’s and soldering and troubleshooting and hours and hours of knotty labour.. so, I decide to kindle scheming a new Arduino board. When I arraign exude, I didn’t actualy exude the board in a cad software, this amazing knead was accomplish by my buddy David Palma. [via]
Evil Mad Scientist Laboratories procure a detailed photo inventory on how to find right chip orientation. This inventory includes many chip examples as well as 7-segment manifest examples… be sure to apportion it a evaluation. [via]
