Mickey Delp dot com

Experimental Garage Sale 2011

I will be one of 13 vendors at the 4th Annual Experimental Garage Sale!

Circuit Bent Instruments, Un-Bent Gear, Parts, Vintage Components, Custom Lamps, Kits, Art, Raffle and MORE.

Vendors: Mickey Delp, Steven Buck, Tommy S., the junkyard catalist, Creme Dementia, GetLoFi.com, Low-Gain Electronics, Tim Kaiser, Mike Kana, Cordinated, Mike Una, Welcome Tomerica, Cosmic Blooper

Saturday, June 4th, 2011, from noon to 6pm, raffle at 3pm. More details in the Facebook Event.


UPDATE: The event was a huge success! The turnout was great and it there were tons of cool electronic gizmos. Many thanks for the wonderful hospitality the Chicagoans showed this Austinite. See you next year!


Dorkbot/Ignite/RadioShack SXSW Project

Event: Ignite & Dorkbot SXSW – Vision of the Future 2021, Friday, March 11, 2011, 6 - 10pm, Austin Music Hall, 208 Nueces, Austin, TX

Dorkbot Austin is teaming up with Ignite Austin for an opening event at SXSW Interactive this year, and I will be participating.  My project is sponsored by Radio Shack.  I am building an analog synthesizer utilizing parts (almost) exclusively purchased at Radio Shack.  The Shack does not sell the variety of chips that it did when I was a kid, but they still carry 555's and various op-amps as well as transistors, diodes, resistors, capacitors, switches, potentiometers and knobs.  Just about everything I need.

Here's a entry about my project on Radio Shack's blog, and here's their post-event blog entry.


UPDATE: The event was a blast! The talks were fun, the exhibits were all great and there was good music too. Plus, I met a bunch of cool people. I finished the synth with, literally, seconds to spare. I designed the device as a simple demonstration of the basic building blocks of an analog synthesizer but, to my surprise, it actually sounds pretty good!

As promised, here is the schematic. There are surely bits that could be improved or simplified. Having said that, it does work well, and I like the sound so much that I have performed with it twice already. All of the modules of a classic analog synthesizer are in there. It has two voltage controlled audio oscillators (VCOs) with square and triangle wave output, a low frequency oscillator (LFO) with square and adjustable ramp wave shapes, an ADSR (attack, decay, sustain and release) envelope generator, a voltage controlled low pass filter (VCF) and a voltage controlled amplifier (VCA). The LFO and envelope can be applied to any combination of the VCOs, VCF and/or VCA.

It was not intended to be a kit, but anyone interested in building it should dive in! I might make it into a kit, but I would have to get enough of a response. It does take a lot of time to design a circuit board, source the parts, write instructions, etc. If you have any questions, please feel free to contact me.

Below are some videos and pictures of the completed synthesizer.

Read more: Dorkbot/Ignite/RadioShack SXSW Project

Workshop at Switched On

Synth Building Workshop presented by Switched On's School of Music Electronics and Delptronics!

I will be leading another beginner electronics workshop and this time we will be building a mini synthesizer. The circuit is an original design reminiscent of the Weird Sound Generator (WSG) and Lunetta synthesizers. You will get all the parts you need, printed directions with lots of pictures, plus hands-on instruction. Beginners are welcome, even if this is your first time soldering. Experienced builders will love the complex sounds this simple circuit can produce.

If you came to the solderless breadboarding workshop, then this is the next step - building a permanent circuit!

Pictures and sounds coming soon...

Sign up for the workshop on the Facebook Event.

Tuesday, November 29th @ 7pm

Switched On Music Electronics
1111 E 11th Street, Austin TX

Workshop: $20 + Parts: $25 =
Total: $45

Ring Modulator with Microphone

I got a question about how to hook up a microphone to the Ring Modulator.  The thing to remember here is that the Ring Mod wants both the input and carrier signals to be line level.  A microphone, even a dynamic mic, does not put out enough voltage by itself, so it has to have a preamp. I use a mono mini amplifier from Radio Shack to amplify the mic signal.

The hookup would be as follows:

Microphone -> Preamp input
Preamp ouptput -> RingMod input
RingMod ouput -> Amplifier input


Ring Mod Mic Hookup

Live Performances by Delptronics

Friday, October 7, 2011 Victory Grill
1104 E 11th St
Austin, TX
Experimental Music Showcase
Friday, August 19, 2011 Trailer Space Records
1401 Rosewood Ave
Austin, TX
Thursday, July 14, 2011 Trailer Space Records
1401 Rosewood Ave
Austin, TX
Tuesday July 12, 2011 Monkey Wrench Books
110 East North Loop Boulevard
Austin, TX
Put Your Money Where Your Mouth Is
Friday, April 22, 2011 The Hanger
11653 Airway Blvd
Roanoke, TX
No Silence No Sleep 2
Sunday, March 20, 2011 House of Commons
2610 Rio Grande St
Austin, TX
Collaborating with Andy Hendrix and the Skwaarmalar Machine
Sunday, March 20, 2011 Salvage Vanguard Theater
2803 Manor Rd
Austin, TX
No Strings- a puppet theatre and electronic music symposium
Collaborating with T. Putnam Hill and Dann Green
Wednesday, February 23, 2011 Club 1808 Collaboration with Andy Hendrix and the Skwaarmalar Machine
Wednesday, February 16, 2011 Club 1808 Solo
Wednesday, January 26, 2011 Club 1808 Solo and in collaboration with Andy Hendrix and the Skwaarmalar Machine

Read more: Live Performances by Delptronics

Handmade Music Austin #13

The next event will be Sunday, November 14th, 1:00pm at Switched On (1111 East 11th Street, Suite 150, Austin, Texas 78702)

Sign up for the event on our Facebook page.

Discount price only at the HMA workshop: $80!


Add a live video component to your audio rig with Lars Larson's BitVision Video Synthesizer kit! A hybrid digital and analog design, BitVision gives a smooth, fuzzy analog color response when displaying pixel images held in its image buffer, and can be controlled by external audio or clock signals.

  • A frame buffer which can display internal shapes and images in many colorization modes.
  • 8-bit color palette, although thousands more can be revealed from the analog color phase shifter.
  • An analog envelope follower/generator that responds to an external audio or clock signal, with gain and decay controls to modulate video.
  • A frequency counter also derived from the audio input, which can modulate video based on the frequency of the input signal.
  • Program and mode selection pushbuttons, as well as two arbitrary knobs and one pushbutton to control parameters dependent on the currently selected display program and mode.
  • Integrating programming header allows savvy users to upload their own images and animation routines.
  • 1/8" jack audio input.
  • Composite video RCA output.
  • Runs off 9VDC wallwart power supply (center negative)


PS/2 Mouse Microcontroller Interface

I wanted to connect a computer mouse to a microcontroller for some projects I am experimenting with. So, naturally, I did a web search to find an existing mouse library. I found a code snippets, but only one really well written library, especially in its timeout handling. That one is by Dany Rosseel, and I found it on the mikroElektronika projects page. Dany's code is written in mikroPascal for PIC, so I translated it to mikroC for PIC and, with Dany's permission, sent my code to mikroElektronika to post on their projects page. The code is pretty straightforward, and should be easy to convert to another dialect of C or C++. Have fun with it - I know I am!

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