YOCTO is a Drum Computer clone of Roland TR-808. This is an exact reproduction of the analog part of the TR - 808 (with the exception of the BA662 VCA Clap has been replaced by a BA6110) coupled with a MIDI sequencer. You can store up to 256 patterns organized into 16 banks of 16 patterns in a Non-volatile EEPROM. Various functions have been added such as the ability to mute every sound, to chain patterns as you want, copy, paste, clear patterns ... (see YOCTO manual)
The kit includes Two PCBs, transistors, CPU, switches, potentiometers and rare ICs. To get a complete Yocto you need the wall wart power transformer, Mouser BOM, knobs and a metal case available by Erica Synth. The transformer must be a 15VAC or 16VAC 1000mA. It is easily found at all distributors of electronic equipment. Here's where you can find: Jameco_16VAC_1000mA or Hammond Transformer or Triad Magnetic_Mouser.
The ergonomics of YOCTO follows that of the TR-808 with 16 edits buttons , two rotary switches for instruments and modes.
-11 drums 100% analog cloned the TR-808
-A common Accent for all drums
-16 banks of 16 patterns from 1 to 32 steps
-16 songs of 256 patterns
-11 separates OUT, one for each drum
-A Mono Master OUT
-2 Trigs Output that allow you to trig a external instrument (a third one is in option on the board)
-Midi IN, OUT, THRU
-Din sync24 IN/OUT to synchronize other machines with same standard
-Update firmware via Sysex
We recommend that you assemble the kit in this order:
For assembly you need a soldering iron, tin, wire cutters for electronics, multimeter. So much for the essential. Settings for different sounds you'll need either an oscilloscope or Scope software that allows you to use your computer's sound card as an oscilloscope. Be focused and meticulous during assembly, pay attention to direction of the polarized electrolytic capacitors, diodes, transistors and integrated circuits components. If you are not sure of the place of a component, download the BRD file YOCTO PCB and the trial version of Eagle. Open the file in Eagle and click the "Show object" function represented by an eye, then type the name of the component you are looking for the location and press Enter. The component will highlight indicating its location. Patience and organization are the key words that will make your YOCTO work the first time.