DIY MIDI Active Sensing Filter
==============================

PACKAGE INCLUDES
----------------

       asfschem.gif     the schematic
       asfpic.jpg       picture of the built device
       asf.bin          software for the microcontroller
       asf_readme.txt   you read it


DESCRIPTION
-----------

This simple MIDI device filters off unwanted active sensing data and
MIDI timing clock from a midi data stream.

The device is selfpowered through the midi cable and does NOT need any
battery or power supply. It can be build into a little screwcase.
Pricing for the parts should be round about 10US$.

If anything went wrong in building the device it will not work but
(normally) nothing will break.
Of course there could be some cases where this might happen but I
was not able to figure these out.

#######################################################################
# The microcontroller AT89C2051 is a cmos device, so handle with care!
# This mc needs to be programmed with the software ASF.BIN enclosed in
# this zip archiv and should be plugged into a DIL-socket.
#
# If you are not shure how to build up the device let it do someone for
# you!!
#######################################################################

If you have no programmer for the microcontroller try to email to some
hobby electronics in internet near your location. I'm shure they will
program it for you for little or no fee.


PARTS NEEDED:
-------------

1  plastic-screwcase about 6x5x3cm
1  little piece of printed board with solder points
2  MIDI build-in sockets
1  ic socket DIL 20
2  diodes 1N4148
1  microcontroller AT89C2051 (programmed)
1  crystal 12MHz
2  capacitors 33pF
1  elko 4,7uF/10V
1  elko 47uF/10V
2  resistor 150 Ohm
1  resistor 220 Ohm
1  resistor 2,7 KOhm
screws for the MIDI sockets and a few cm cable.


Copyright of the software by Stoffel (Stefan Harasim) 1999

Email:    stoffelshome@gmx.de
Homepage: www.stoffelshome.de