ilikeit

MK170 sequencer
« on: October 21, 2010, 06:41:19 AM »
hi all

i ve seen this video.....
http://www.video81.com/video/pJ35ShtB8XI/MK107-sequencer.html
and i found that it s fanstastikk ;D

i looking for the complete shematic of this
i have only found this but i don t understand all ???
http://newsodrome.com/instrument_news/synth-sequencer-from-an-led-kit-10221442.jpg

Maybe someone can help me!!

Thx

Regards


Sredna

Re: MK170 sequencer
« Reply #1 on: October 21, 2010, 08:11:37 AM »
That is not the correct schematic.

Look here: http://www.velleman.eu/downloads/0/minikits/manuals/manual_mk107.pdf

The rest is explained very clear in the video.

Short:

Buy and build the kit, test its normal funktion.

Solder a wire between R1 and QA1, connect the other end of the wire to the left solder tab of a
10kOhm linear potentiometer(pot). The right tab of the pot goes to earth = minus side of the battery.
Repeat for R2, R3 .....R8. (you'll need 8 potentiometers)

To the middle pin of the pots you connect the unmarked end of a diode (type 1N4148 or pref. Schottky or germanium, you'll need 8 diodes). The other end (marked with a band) is connected together with all the other diodes and then connected to the left tab on a 100kOhm linear pot. Right tab to earth, middle tab to the output connector.

Good luck,

Anders

Hmm... in which direction do the electrons actually go?

ilikeit

Re: MK170 sequencer
« Reply #2 on: November 08, 2010, 10:56:20 AM »
thx a lot!!!
it works fine!
Regards