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Category: Ideas and Articles

4 Comments

Unlocking stuck photo filters

By electrobob November 4, 2011 February 8, 2017 Ideas and Articles

Simple way to unlock 2 stuck photo filters with nothing but a ribbon. Continue reading

Tagged camera, filter, locked, polarizer, polarizing, rotating, screw, stuck, thread, unlock, UV

21 Comments

Digital Power Supply – Part 1: Concept

By electrobob March 17, 2011 February 8, 2017 Ideas and Articles, Projects

Started working on a digitally controllable power supply. Continue reading

Tagged analog, comparator, digital, loop, microcontroller, power, regulator, smps, supply, transformer, transistor, xmega, xmega32a4

9 Comments

555 / 556 H bridge

By electrobob February 22, 2011 February 8, 2017 Ideas and Articles, Projects

Simple H-bridge using 555’s. Continue reading

Tagged 555, 555contest.com, 556, bridge, cheap, contest, diode, h-bridge, hbridge, low, microcontroller, motor, power, pwm, simple, timer, zener

29 Comments

Toner transfer to ABS

By electrobob December 3, 2010 February 8, 2017 Ideas and Articles, Utils

Yes, apparently you can transfer toner to ABS to make nice project boxes. Continue reading

Tagged abs, aluminum, box, enclosure, front, frontpanel, frontplate, heat, iron, iron on, panel, pcb, plastic, toner, transfer

7 Comments

Linear LED power supplies

By electrobob March 15, 2010 February 8, 2017 Ideas and Articles

How to drive LEDs? WIth constant current supplies, of course. Continue reading

Tagged constant, current, drop, led, leds, linear, LM317, resistor, supply, transistor, voltage

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