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Electro Bob

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18 Comments

Fun with LEDs

  By electrobob January 5, 2012 February 8, 2017 Projects

Simple circuits to get night lights on the hallway and motion lights in the rest of the house. Continue reading

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
9 Comments

Upgrading spotlights to LED

  By electrobob June 20, 2011 February 8, 2017 Projects, Utils

Turned my hallway spotlights to some nice LED lights. Continue reading

Tagged   halogen, ikea, led, light, orange, replace, spot
2 Comments

XMEGA header board

  By electrobob April 12, 2011 February 8, 2017 Utils

A simple header board for an ATXMEGA32A4U microcontroller. Continue reading

Tagged   AVR, board, breakout, header, prototype, xmega, xmega32a4
17 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
12 Comments

555 class D amplifier

  By electrobob February 28, 2011 February 8, 2017 Projects

Building a 555 based class D amplifier, even building the 555. Continue reading

Tagged   4013, 4093, 555, 555contest.com, amplifier, audio, class d, driver, gate, high, lm319, mos, mosfet, outpu, power, pull, push, transistor
14 Comments

Secret knock detector with 555

  By electrobob February 28, 2011 February 8, 2017 Projects

Detecting a secret knock pattern using 555’s. Continue reading

Tagged   555, 555contest.com, breadboard, circuit, detector, door, entry, knoc, led, microphone, relay, reset, secret, timer, transistor
8 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
35 Comments

EGO BOX

  By electrobob January 15, 2011 February 8, 2017 Projects

A physical display that connects to the internet to display the visits counter on my website. Continue reading

Tagged   7, access, box, count, counter, display, ego, enc28j60, ethernet, hits, internet, php, physical, script, segment, seven, stack, tcp/ip, view, visits, wordpress
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
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  • All posts

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    • Technology I want April 5, 2020
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    • The basil speaks to me – Part 2 November 5, 2019
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    • 10002 Screens and controls October 2, 2019
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    • 10002 Short assembly run no 2 July 24, 2019
    • The basil speaks to me July 23, 2019
    • GPP-4323 power supply review June 3, 2019
    • New 3D printer May 19, 2019
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    • The coolness of RGB LEDs April 21, 2019
    • Lazy smoke away November 27, 2018
    • 10002 Short assembly run November 3, 2018
    • Wine lamp June 26, 2018
    • Vorpal hexapod June 26, 2018
    • 10002 Motion sensors? June 6, 2018
    • 10002 Temperature sensors? June 6, 2018
    • Simple audio mixer December 25, 2017
    • Bosch glue pen teardown May 21, 2017
    • 10002 Progress May 9, 2017
    • 10002 Architecture and Software April 30, 2017
    • Analog Discovery USB isolation March 11, 2017
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    • Peaktech 6225A review February 5, 2017
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    • Castellated pads July 31, 2016
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    • Cheap China July 25, 2016
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    • Digital Power Supply – Part 3: Concept comparison February 23, 2016
    • Bad wires December 6, 2015
    • Sit.Up August 12, 2015
    • Active probe August 6, 2015
    • Ser SHOW April 26, 2015
    • Quiet 3D printer April 19, 2015
    • 5UP – simple 5V UPS April 15, 2015
    • Simple active/standby current measurement April 15, 2015
    • AVR programmer fix April 11, 2015
    • LED Logger V3 March 15, 2015
    • ESP8266 tests November 17, 2014
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    • WS2812 level translator March 15, 2014
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    • LED logger V2 December 21, 2012
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    • Digital Power Supply – Part 2: Prototype February 19, 2012
    • Fun with LEDs January 5, 2012
    • Unlocking stuck photo filters November 4, 2011
    • Upgrading spotlights to LED June 20, 2011
    • XMEGA header board April 12, 2011
    • Digital Power Supply – Part 1: Concept March 17, 2011
    • 555 class D amplifier February 28, 2011
    • Secret knock detector with 555 February 28, 2011
    • 555 / 556 H bridge February 22, 2011
    • EGO BOX January 15, 2011
    • Toner transfer to ABS December 3, 2010
    • LED UV exposure box part 2, the timer September 29, 2010
    • USB tree September 4, 2010
    • LED UV exposure box part 1, the box June 24, 2010
    • RFM12B mini breakout board June 22, 2010
    • CoMBi Clock June 5, 2010
    • Sunrise simulator April 7, 2010
    • Linear LED power supplies March 15, 2010

  • Links

    • Crazy Engineers
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    • EEVBlog
    • EEWEB
    • Electrical Engineering Community
    • Electronics Design News
    • Electronics Lab Blog
    • Hack a day
    • Lifehacker
    • Online Schematic Tool
    • Otter equipment
    • PCB Prototype
    • ZofzPCB 3D gerber viewer
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