Friends bragging lately about the quality of the sound of their drum machines?
Tell them you can make sounds lower fidelity than they can.
LUNCHBEAT is a 1-bit groovebox, making impossibly-dirty digital sounds, with a built-in step sequencer. While we await a proper DIY kit, it’s an ideal learning project: it’s nice and simple, has a low part count, everything you need as far as specs is available free to create your own, and it’s a good way to work out the basics of digital sound and sequencing.
And, really, if you need more than one bit to make music, what kind of musician are you? Go minimal.
Specs:
Minimalistic groovemachine !
========================================
– 4 channels with 1 bit realtime generated sounds
– kickdrum, snare, hihat and bass
– 8 step sequencer
========================================
hardware:
– MCU atmega328p@16MHz
– 8 LEDs with 74595 shift register
– 3 bit R2R resistor ladder DAC
– LM358 opamp as output buffer
– buttons, pots, resistors, wires, protoboard
========================================
software:
– programmed in C
– compiled with avr-gcc
– uploaded with avrdude
========================================
sources released – http://buranelectrix.com
========================================
And it’s all hackable, especially if you know Arduino:
ISP6pin – hacker’s gate to unit’s microcontroller. Tweak the sound algorithms. Tweak the sequencer. Change unit’s purpose completely. Use the fact that Lunchbeat is the same thing as Arduino with 6 buttons, 5 pots, 8 LEDs on SPI shift register and 3-bit digital to analog converter. You can run Arduino sketches on it. From here it is up to you and your fantasy.
More:
http://buranelectrix.com/lunchbeat/lunchbeat.php
And you should be able to build this with your lunch money. I hope you do have lunch money and lunchtime, I mean, after plugging a cable from the back of your PC speaker to the front last week.
Wonder what a PWM audio version of this would sound like…
Wonder what a PWM audio version of this would sound like…
Wonder what a PWM audio version of this would sound like…
That thing sounds rad. Pcb please.
That thing sounds rad. Pcb please.
That thing sounds rad. Pcb please.
Would it be possible to use an Arduino Uno as a programmer for the atmega? (And then just breadboard the parts together?)
Definitely possible 🙂
Thanks!
One more question, is the PCB parts list applicable to the breadboard version?
Yes, but PCB version uses some more parts (power supply, volume).
…or with a Teensy, for class-compliant MIDI??! That’d be a bit awesome…
I haven’t tried with any other microcontroller than 328p. But it should be portable easily.
Would it be possible to use an Arduino Uno as a programmer for the atmega? (And then just breadboard the parts together?)
Definitely possible 🙂
Thanks!
One more question, is the PCB parts list applicable to the breadboard version?
Yes, but PCB version uses some more parts (power supply, volume).
…or with a Teensy, for class-compliant MIDI??! That’d be a bit awesome…
I haven’t tried with any other microcontroller than 328p. But it should be portable easily.
Would it be possible to use an Arduino Uno as a programmer for the atmega? (And then just breadboard the parts together?)
Definitely possible 🙂
Thanks!
One more question, is the PCB parts list applicable to the breadboard version?
Yes, but PCB version uses some more parts (power supply, volume).
…or with a Teensy, for class-compliant MIDI??! That’d be a bit awesome…
I haven’t tried with any other microcontroller than 328p. But it should be portable easily.
Reminds me of Noah Vawter’s One Bit Groovebox from back in the day…
http://web.media.mit.edu/~nvawter/projects/1bit/index.html
Reminds me of Noah Vawter’s One Bit Groovebox from back in the day…
http://web.media.mit.edu/~nvawter/projects/1bit/index.html
Reminds me of Noah Vawter’s One Bit Groovebox from back in the day…
http://web.media.mit.edu/~nvawter/projects/1bit/index.html
having a difficult time finding a 3-bit dac….. any ideas? Also is there an exact parts list somewhere?
Hi!
3-bit DAC is R2R type and is formed with resistors R1-R8.
Exact part list you can find in repository on GitHub: https://github.com/buranelectrix/lunchbeat-PCB
having a difficult time finding a 3-bit dac….. any ideas? Also is there an exact parts list somewhere?
Hi!
3-bit DAC is R2R type and is formed with resistors R1-R8.
Exact part list you can find in repository on GitHub: https://github.com/buranelectrix/lunchbeat-PCB
having a difficult time finding a 3-bit dac….. any ideas? Also is there an exact parts list somewhere?
Hi!
3-bit DAC is R2R type and is formed with resistors R1-R8.
Exact part list you can find in repository on GitHub: https://github.com/buranelectrix/lunchbeat-PCB
I want this.
I want this.
I want this.
No, I don’t need more than one bit to make music, I want more than one. Now onto the device. All I can say is that it serves it’s purpose quite well if this is completely truthful.
No, I don’t need more than one bit to make music, I want more than one. Now onto the device. All I can say is that it serves it’s purpose quite well if this is completely truthful.
No, I don’t need more than one bit to make music, I want more than one. Now onto the device. All I can say is that it serves it’s purpose quite well if this is completely truthful.
that breadboard version is gorgeous! so cool
that breadboard version is gorgeous! so cool
that breadboard version is gorgeous! so cool
Ah soo cool!! I need learn how to make this stuff, Thanks for the inspiration!
Ah soo cool!! I need learn how to make this stuff, Thanks for the inspiration!
Ah soo cool!! I need learn how to make this stuff, Thanks for the inspiration!