NOTES FOR THE VOICE DIGITIZER CIRCUIT

1. You can print the schematic and all documentation with the 
PRINTALL.BAT file.

2. The author left out some important parts of the circuit 
in the schematic, so use the one in this file.

3. You can only print this schematic on an EPSON-compatible
printer.

4. I used batteries to power this circuit. It requires 12V,
which means 8 AA batteries.  You could also use a 12V power
supply, but it has to be **QUIET**.  I think the batteries
are easier.  Since the circuit will only be on for a short
time, they should last just about forever. NOTE: The circuit 
designer says that this should run just fine on 18V, so two 
9V batteries in series is a cheap solution.

5.  Wire this circuit carefully and don't screw up any of 
the connections.  Take your time.

6. Wiring layout isn't critical.  You should see my sloppy 
circuit board.

7. Unfortunately, the RECORD.EXE file doesn't work on some 
computers.  It has to do with the timing chip.  Systems that 
definitely DO NOT work are COMPAQ portables and SHARP 7000 
series lunch-boxes.  I've tested this on about 10 other PCs 
without difficulty.  TANDY, as always, is questionable.

8.  Cost for the electronic components should run about $15,
but the cabinet and other hardware bring the price up.  For 
resistors and capacitors, go to the counter and just buy 
what you need. Avoid the packaged goods.

9.  USE SOCKETS FOR THE ICs!

10. Observe polarities on the electrolytic capacitors.

Serial Port Notes:

If you have a DB-25 connector on your serial port, the pins 
for this circuit are:

CTS  ----------  Pin 5
Signal Ground -- Pin 7


If your serial port has a DB-9 connector, pins are:

CTS  ---------   Pin 8
Signal Ground -- Pin 5

FINAL NOTE:

When you first try this circuit, don't be surprised if it doesn't work.  
The adjustment of the 50K pot is critical.  For me, it 
worked almost exactly in the center of the pot's travel.  Experiment!


GOOD LUCK!



George Campbell
1472 Sixth St.
Los Osos, CA  93402
CIS 71571,222
GEnie G.CAMPBELL
SLO BYTES BBS
(805) 528-1759
SysOp: George Campbell