TR-808 Clone PCB!

Design Concepts
1

Aha!  Time time draws near, I’ve got a set of beta PCB’s arriving tommorow which I will do my best to stuff and solder this weekend.  Barring unforseen problems with the layout I am on schedule to do a run of PCB’s in mid-late August.  I will be providing with the PCB nearly all the difficult to find components, including alot of the original sillicon. 

There is also a fellow who has been working hard to create a REALLY REALLY nice case for the clone, details to come. 

If your interested in building your own 808 send me an email at smeffasystems@gmail.com to get on the list.

2

Do you have more info about these PCBs? As in, how things will be triggered, types of controls, etc?

Thanks…

-Steve

3

The original circuits have been included, and I’ve also added in most of the modifications that hallucinogen did for his clone. 

The sounds will be triggered from a stripped down MBSEQ, which is included in the PCB, some extra code still needs to be written to allow the sounds to be triggered via midi.

4

The original circuits have been included, and I’ve also added in most of the modifications that hallucinogen did for his clone. 

The sounds will be triggered from a stripped down MBSEQ, which is included in the PCB, some extra code still needs to be written to allow the sounds to be triggered via midi.

Ah, nifty. So you’ve got permission from TK to include MIOS in something you are selling? Congrats.

Got any more info about the board layout, dimensions, anything like that? I’m interested, but I want more details first…

-Steve

5

Excellent! Count me in for a set then!

6

The sounds will be triggered from a stripped down MBSEQ, which is included in the PCB, some extra code still needs to be written to allow the sounds to be triggered via midi.

What about programming the sounds via MIDI?

7

What about programming the sounds via MIDI?

This is a clone of an analog synth. Making the sounds programmable via MIDI would be an amazing amount of work, and thusly make it no longer a proper clone.

-Steve

8

This is a clone of an analog synth.

TR808’s are analog?!  :stuck_out_tongue: hehehhe

I know all that stuff… But I was just hoping…

9

Actually, it’s remarkably easy to put some parameters such as TUNE or DECAY under CV control using just a resistor and a transistor. How you’d interface the CV to the sequencer I don’t know, I guess you could have an ‘Automation’ track or something.

10

Way back when..  I was going to try to make the whole 808 VC’d.. but damn that is one serious task, better to start small I figured.

The board dimensions are 11x16".  Huge really  ;D

Ah, nifty. So you've got permission from TK to include MIOS in something you are selling? Congrats.

Y’Know, that just reminded me that I have to get some more approval pertaining to the SEQ section before I do a run..

11

hi

i m also trying to make a clone of the 808

i want to build eatch sound separatly on a pcb like Hallu.

and build a sequencer. i gona use a R8c/13 µC From Rensas

actualy i ve done only the basscick pcb and the switch board

and i m working on the serial shiftregister, first time that i do a such complex

work.

i also simulate all sound modul with ElectronicWorkbench That is work pretty well for That

maby it would Be great to cooperate.

12

Hi toxic… What’s the aim of your project? It sounds like “re-inventing the wheel” to me… You’re doing synth layouts like hallucinogens, and building a sequencer from the ground up…

So why not just use hallucinogen’s synths and a MBSeq?

13

right so..

all that really matters is:  so what’s the kit price?    :wink:

14

yheap

you re probably right!

i ll do like this finally

But i wanted to understand how work the famous TwinT Filter

and see it in work by my eyes  ::slight_smile:

i just hope that there is no error in his pcb

because without the schems it s not easy to understand

:stuck_out_tongue:

but i think now , i would be able to do it with all the lecons of electronic that ive folow.

i ll finish this , and find a other think, maby for my end of study work.

…i ll send this 808x clone’s picture here later

see you soon  :slight_smile: …

15

i would need a config. that alow a less 16 pulse output in 15volt

controled by a sequencer with synch24, din modul for step prog. etc …

is anybody have a sugestions for this , it would be welcom  ???

i m minding on this problem…

16

I’ve got all these problems solved.  Details to come, the solutions are pretty simple.

17

so great!!!

can’t wait to see the plan  :o

it would be great to get more than 16 trig/Gate out to control also external fx, DrumSynth etc …

if u can send me info on Galactikexplorer@hotmail.com

Tks …

18

Hi:

I’m interested in a set of PCBs. I’ll send you a mail.

Thanks.

19

Count me as interested too.  I’d need to hear a price first of course.

Also, would it be possible to tap off the triggers from your board to trigger external analogue modules?  I mean by the builder.  What’s the trigger voltage?

20

Trigger voltages are 5v.  The 808 itself uses a 5-15v pulse for the accent signal.  I don’t have anything to test with, but it is my assumption that you can just tap the 5v pulse for trigger.  I’ve got a header on the board for doing this, and there is a simple buffer there to drive a LED which I’m pretty sure can do double duty. 

Check out the WIKI page, I’ve got a description of how it all works there.. just text tho so it may be rough to read..