Ignition Coil sparks with Relay Driver/Interrupter

The NC contacts (one of the pair) of a 12 volt 10 amp DPDT relay are bridged by a .25 uF capacitor and wired in series with the relay coil to form a vibrator. The relay coil is then wired across the ignition coil primary. The capacitor is essential, but its value is not critical but it should be about 400 volts. I use a condenser from a points/condenser ignition system. You only need one NC contact pair. The DPDT relay is easy to obtain but only half of it is used.

Boss SD1 Rick's Mod VS Boss SD1 Stock

this is the demo of my Boss SD1 Rick's Mod I VS the original SD1 from Boss... I've made this box more clarity, rich tones, and tube like... just change some caps and resistor, put a DPDT switch on it, kinda soft boost..giving more power and sustain... I hope you're gonna enjoy it...

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A standard light bulb as a current limiter / voltage divider

Single pole double throw switch allows this standard light bulb to be inserted in series with the outlet. This effectively browns out whatever is connected to the outlet.....say.....for example.....the extension cord your neighbor is using to steal electricity from you. Stay tuned.

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Build a 455KC 10.7MHz Signal Injector

Hi richard, I put together a 455kc 10.7mhz signal inje like you did. i put a single pole double throw switch. i put the center pole on 1st am and fm amp. grid one 12ba6 i put one side of switch to fm-am conv and put the orther side to a rca plug.made a very good siganl tracer. you can switch inje to tracer like to know what you think.....johnny ...got to have shielded wire....zenith am. fm. hi rich, you need to put a 2meg bleeder resister across that singal tracer cap. it will work much better. rich, i am not set up to do video. maybe you can do something with it. it sure works good. it work as good as my NRI model 34 signal tracer. rich you do not need to respond to this email...hope i am not bugging you to much.....johnny Build a AF & RF Signal Tracer www.youtube.com Zenith H723 www.nostalgiaair.org Build a 455KC 10.7MHz Signal Injector

HVAC furnace operation with LEDs

I installed LEDs to indicate the status of relays on my fan control board. Notice that an LED went off when the blower came on.... that indicates the blower is controlled by a single pole, double throw relay which when off, applies the 120 vac to the blower motor.

DIY True Bypass Looper Guitar Footswitch 1Channel 9v

NOTE: !!! 3/14/2012 The beavis audio link below is broken so the new link is www.diyguitarist.com schematics www.beavisaudio.com It's the schematic that says True Bypass Loop with LED Indicator BTW if you decide to make the it without led you can buy the DPDT switch at Radio Shack. Parts. Radio Shack Case 270-1802 $2.99 (You can use whatever case you want) LED Light (2 in a pack) $2.49 2.1MM Power Jack $2.99 (M size (9V) 2.2K Ohm 1/4-Watt Carbon Film Resistor (5 Pack) 271-1325 $.99 1/4 Mono Jack 274-252 (2 in a pack) $3.09 (need to buy 2 of these) 3pdt button... EBAY or look online Actually everything is available on www.pedalpartsplus.com note: Do not use the 9.V jack from Radio Shack or similar metal ones if you are using a metal case unless you are going to have some sort of rubber insulator around it. Remember the 9V is center negative for this build.

Midtown Mini Rail Session (EA Skate 3 Video)

Short spot session video, featuring pairsprowlin666 and myself. We figured out how to access the area outside the boundaries of the new Art Gallery DLC. It's actually surprisingly easy to get there, so don't bother asking. As we explored the "hidden" area, we came across a tiny handrail that was pretty difficult to skate. We ended up getting a decent amount of tricks on it, so we filmed what we had saved there. The end result was this short session video I threw together. Hope you guys enjoy! You can shred the Art Gallery and it's surrounding areas if you purchase the "San Van Party Pack" for 560 Microsoft Points (or $6.99 if you're PS3). If you are a fan of the older Skate games, I strongly recommend you purchase this DLC! You can find more Skate 3 videos (and other edits) on my channel: www.youtube.com "Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use."

AM transmitter

Homemade $5 2-Channel AM transmitter Although FM transmitters are a dime a dozen basically anywhere they sell anything (so you can pump your ipod/CDs whatever through any FM radio, like in your car). However, low power AM transmitters are a pain to find. Some digging on the net revealed commercially available ones for around $50, but I wasn't ready to spend that much. I built my own, with about $10 in parts (if you had to buy it all new, I had all but $3 of it in junk bins). My final design was a jazzed-up chimera of about 3 similar designs. I could only find a handful of simple ones online. I started with the version here at sci-toys.com . The basic idea is to run a signal through a crystal oscillator, which when output to an antenna, sends radio signals at a fixed frequency (in our AM band's case, 1.0 and 1.2 MHz).sci-toys.com Oscillators were purchased from Mouser.com for under $2 each. I added LED's, a switch, and 2 channels in case there's a radio station on one, or there's interference. I used the other half of my DPDT switch to control a single LED indicator. www.agileguitarforum.com However, there was a problem that caused the output from the antenna on one channel to influence the other one when both the antenna and ground are linked, essentially halving the power and causing both channels to always be transmitting. So, back to the drawing board, here's the final version that works like gangbusters: www.agileguitarforum.com Note: small transmitters must be kept ...

Wired Robot with DPDT switches.mp4

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Atari Punk Console - VCS Tribute

From Forrest M. Mimm's 1980 publication "Engineer's Notebook: Integrated Circuit Applications" came the stepped tone generator - two 555 timer ICs are configured to create a single square (pulse) wave. Kaustic Machines coined the term Atari Punk Console to describe the circuit as it's output is similar to the sounds of the Atari VCS games console of the 1980s. The work featured here is a DIY build of an Atari Punk Console inspired analogue synthesiser known as the Dub-Step-Arcade designed by Matt The Modulator (aka Matthew Newlove). As a tribute to it's origins in the dusty circuits of the 1980s the build is housed in a heavily modified Atari VCS enclosure. Materials used include hand machined matte black acrylic control panel and Atari VCS enclosure, laser engraved gloss black acrylic fascia (RazorLAB), salvaged mains power supply, reconditioned stock Atari VCS DPDT switches, stock arcade machine parts and miscellaneous fixtures, fittings and electronic components.