Random Number Generator

This is Midfi Electronics “Random Number Generator”. It’s a radical fuzz that adds oscillation notes that randomly arpeggiate off of the fundamental note played. Crazy noise maker pedal. I’ve built several of these now by request. The owner of the design over at Midfi was gracious enough to share the schematic on the DIYstompboxes forum which is why I want to make it clear that this is NOT my design, and if you get one for me you are strictly paying me to make a clone since these aren’t available anymore.


This is the first one of these I’ve built. I added the mods of changing a 100k resistor with a pot, and a diode that is switched into the circuit, but quite frankly they don’t do a whole lot. Any others of these I build will just have the volume knob as original intended.

Uglyface

The Uglyface effect is an oscillation based distortion/fuzz pedal with envelope controller designed by Tim Escobedo. It can do a wide varitey of off the wall sounds (laser guns, bagpipes, drones), and it has many different ways to modify the circuit. I’ll liked it so much I built it into one of my old junker guitars (details below).


This is the first Uglyface I’ve built. I built it into some crazy electronics box with huge heatsyncs on the sides. Seemed to fit the circuit some how lol. I did the standard controls of Volume, Threshold, Frequency, and Sensitivity, and added a mix control that worked ok.


I had this old guitar knocking around for a while, so I decided to mount an Uglyface inside of it. It has all the same controls as the pedal above, but I also added a Light Sensor with switch for controlling the frequency knob.

Furby Bending Tutorial

Since I’ve been asked many times about bending furbies I thought I would make this guide to help those that would like to give it a try.

This furby is in the typical shape I find most of them in. Let’s take away his dignity further by striping him of his fur.


This lump on his bottom side is where there is a strap tie holding his fur on. Cut this, and pull the tie strap out.
Furby 3
Roll his ears back and cut the threads holding them on.

I usually roll his fur up along his body so we can expose the screws holding his face piece on. Remove the screws, and there will be some hot melt glue attaching the fur to the top of his head. With some light tugging the fur should free and then you’ll have your very own naked furby. Remove all the screws from the carapace, and it will come apart in 2 halves.

See, look at how liberated he is to be freed of that cumbersome fur.
Furby 6
You have to take off the speaker/tummy switch to be able to tilt his battery compartment over, and get to the circuit board underneath. This is also a good time to add wires to the speaker for your output jack.
Furby 8

I’ve found a stable glitch, and loop bend that stem from the same common point. I have the common marked in red, the glitch in blue, and the loop in green. Your mileage may vary from one furby to the next. On this particular furby I used a 47 ohm resistor in line with the glitch wire to make it a little more stable. I’m sure that there are more bends in a furby, but I haven’t dug to deep because I’ve heard that these fry easy.

The bending has changed him some how….

I normally run the bend wires along the right side of the furby up to his head. There is a small area on the back of a furbie’s head where you can drill a hole, and run the wires out to a control box. I normally set it up with a switch for the glitch bend, a normally open push button, and switch for the loop. You use the push button to find a loop you like, and then flip the switch to lock it in.

I’ve had a lot of people ask me about the way the loop section is wired, so I made up a nitty gritty diagram in MS paint. I still have the wires colored the same as in the circuit board diagram. Basically what’s happening is that you have the same connection wired to 2 different kinds of switches.

Disclaimer:

As always I won’t be held responsible if you try this bend and your Furby get’s hurt!


I’ve done quite a few furbies now, and I always try to make each one unique to the others. I’ve played around with decorating them in strange ways, and I built one that has all it’s bends controlled by an Atari style joystick. I’m going to post some pics of a few of these on this page.

Modified Fab Echo

Modded Fab Echo

 
 

On a whim I bought one of these little boxes. For less then 20 bucks I figured what the heck! Did a little searching on Aron’s DIY Stompbox Forum, and found out that the Fab Echo uses a common chip to full on delay pedals. After checking over a couple schematics I (with the help of some forum members) found out how to un-lock the Fab Echo’s delay potential. I have the ability to add a Delay “Rate” knob (speed of repeats), increase the mix knob to full wetness, and to give it full feedback (which literally makes it feedback). On top of these controls I’ve also added LFO’s to the delay circuit that cause strange swirly sounds, and pitch bending weirdness. I mount the Fab Echo on to a larger box (in most cases) to make room for the added controls (there is no room inside these things. I set the LFO up to be powered by the 9v battery, or a pedal power supply. I’ve been charging 140. for the full setup (with LFO), and would of course charge less for a simplier one.
If you are interested in getting a Modified Fab Echo please send me a line through my contact page

For those that want to take on the basic mods themselves here is a link from the DIYstompboxes forum to the best documention of it I’ve found thus far.

Fab Echo

This is the first modified Danelectro “Fab Echo” pedal that I built. I made it so that that it now has a controllable delay time (from short to very long), and also made it so that you can control the delay time with the large knob or light senor. I also made it so that the pedal can feedback when the repeat knob is turned all the way up. There’s an added jack for expression pedal control of the delay time. This one has been sold.

Fab Echo

This is the second Fab Echo that I’ve modified. This one has the LFO feature built into it with with rate indicating LED, Rate control knob, and LFO on/off besides the usual mods. I will definitely take custom orders for these now that I have a good method for modifying them. This Fab Echo has sold.

Fab Echo

This version has all the mods above, plus the Osc. can go between triangle and squarewaves. This Fab Echo has been sold.

Fab Echo

 
This Fab Echo has all the earlier mentioned mods, plus it has some modifications to the LFO circuit. This one has the ability to have square or triangle shaped waves controlled by a pot to get the in-betweens, and there is a Depth knob that really opens up the versatility of the LFO feature. This Fab Echo has been sold.