FROM TOY TO DRUM MACHINE - making your own music gear: #1

Sometimes you just want to make your own professional music gear! Do you think i will succeed making a full functional drum machine from a retro fx key chain toy?

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leave a comment If you think this digital cat is cute!

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The following electronic where used in this project:
- Executor/Echo Keyller effects Key chain
- 2n222 transistors
-Teensy 3.2 (micro controller like Arduino )
-1M linear potentiometer
-LDR
-Leds
-Nerd Magic

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0:00 Epic Intro
0:18 One step further then circuit bending!
1:03 What is inside this toy?
1:57 Let's use a micro controller.
3:00 The first experiments.
4:00 Control all buttons with a micro controller
5:02 Control the toy with a Digital Audio Workstations.
5:42 Circuit bending basics- changing pitch.
7:03 More musical Experiments.
7:23 Adding a line Output.
7:41 JAMMING AND DANCING.
8:02 How can i control the pitch with midi?

[NicStage]

Another cool thing about LDR's is that it keeps the systems electrically disconnected. Kind of cool when you want to adjust bigger power things with little power things. :)

[ryanburk]

Dude. You got me all sorts of inspired to do stuff like this. Easy sub

[DoppleBangGang]

Very cool! I think that LDR/LED pitch control was a genius work around. Excited for part two!

[SidRockett]

This is cool! Looking forward for Part.2!

[analog_output]

I've seen toys where the pitch resistor connects to two pins on the sound chip and ones where it connects Vcc to one sound chip pin. My guess is that in the former case it's coupled with a capacitor to control the clock speed while in the latter it's going to a voltage or really current controlled oscillator for the clock — in that case you can replace Vcc with a variable voltage to change the pitch. But in the former case you really need something acting as a variable resistor, such as your homemade vactrol (or the commercial one I used in my Megamodule). Nice work!

[zaphodb]

This goes for all transistors in your setup: It is probably wise to use a resistor of e.g. 1kOhm between the transistor's base and the teensy output. Otherwise if you connect them directly the transistor will restrict the base-to-gnd-voltage to 0.6 Volts and the Teensy wants to output 5 V (or is it 3V3) and one of the two might not like the voltage of the other. The 1kOhm resistor will allow for a controlled voltage drop between the teensy and the transistor's base. Geinig projectje, overigens!

[xKatjaxPurrsx]

I found the same keychain but with Star Trek sound effects instead :) Going to do the same thing but as a Kosmo module :)

[murrrr]

I searched for battery size of the thing to circuit bend. Turns out you made everything I planned already. Nice tutorial for me haha

[PeetHobby]

Where is your base/gate resistor and where is your load resistor?

[makerdojo]

2:34 why can't you just send LOW from Teensy?
EDIT: after merging power lanes, oc

[OmBotCult]

How can I learn to write code for Arduino?