Star Tech Journal
Issue: 1994-April - Vol 16 Issue 2 - Page 7
April 1994
--krAR TECH JOURNAL
ADDING A METER
TO A TICKET DISPENSER
MODIFICATIONS
AND PROCEDURE
Video Card
Games
Robert Gill
Castle Golf Family Fun Park
Prescott Valley, Arizona
SUBJECT
MODIFlCATIONS
Redemption meters. I have a
couple of questions about the at-
tachment of a meter to a DL-1275
ticket dispenser (see S*TJMarch
'94, V16/Nl).
I have attached a 12V meter to a
Deltronic's DL-1275 board with-
out replacing the 2N2222 and
have had no problems.
Our
My first question is, what hap-
pens when (not if) the dispenser
runs out of tickets? The dispenser
would see a continuous "notch"
and your TIP 120 would be on all
the time providing a continuous
12V to a SV meter.
RUN
HI VOLTS
Secondly, what if the game sup-
plies TTL level SV on the notch
line. (The game supplies the high
signal and the dispenser pulls it
low when it sees a notch.) A
meter attached to 12V will pull
this 5Vup to 12V possibly dam-
aging the game board.
XSISTORS
It certainly doesn't hurt to replace
the 2N2222 with a TIP120 tran-
sistor. But If you would look at a
schematic for Deltronic's DL-4,
you would see that they use a
2N2222 fqr a ticket meter output.
And it drives a 12V meter.
DON'S
VI DE 0
CORNER
8 Line
Machines
Don Powell
I used a couple of diodes to iso-
late the meter pull-up voltage
from the game board pull-up
voltage and visa versa.
PROCEDURE
• First, cut the notch output
wire.
• On the side going to the
. ticket dispenser board, at-
tach the cathodes of two di-
odes (1N4001, 1N4002, etc.).
• Connect the anode of one
of the diodes to the notch
wire going to the game.
• Connect the anode of the
other diode to one lead of a
12Vmeter.
• The other lead goes to 12V
( or if you want use a SV
meter, connect the other
lead toSV).
• Finally put a third diode
across the meter for fly-back
protection ( cathode to 12V
or SV).
DON'S VIDEO REPAIR
Shelbyville, Tennessee
CHERRY
MASTER
CLEARING
THE
RAM
SYMPTOM
Blown diodes.
CAUSE
Remember to turn off the
game before attempting
to clear the Ram.
PRECAUTION
If you don't, you can eas-
ily blow the diodes in lo-
cations D 1 and D2.
-----------------1-----------------
--krAR TECH JOURNAL
ADDING A METER
TO A TICKET DISPENSER
MODIFICATIONS
AND PROCEDURE
Video Card
Games
Robert Gill
Castle Golf Family Fun Park
Prescott Valley, Arizona
SUBJECT
MODIFlCATIONS
Redemption meters. I have a
couple of questions about the at-
tachment of a meter to a DL-1275
ticket dispenser (see S*TJMarch
'94, V16/Nl).
I have attached a 12V meter to a
Deltronic's DL-1275 board with-
out replacing the 2N2222 and
have had no problems.
Our
My first question is, what hap-
pens when (not if) the dispenser
runs out of tickets? The dispenser
would see a continuous "notch"
and your TIP 120 would be on all
the time providing a continuous
12V to a SV meter.
RUN
HI VOLTS
Secondly, what if the game sup-
plies TTL level SV on the notch
line. (The game supplies the high
signal and the dispenser pulls it
low when it sees a notch.) A
meter attached to 12V will pull
this 5Vup to 12V possibly dam-
aging the game board.
XSISTORS
It certainly doesn't hurt to replace
the 2N2222 with a TIP120 tran-
sistor. But If you would look at a
schematic for Deltronic's DL-4,
you would see that they use a
2N2222 fqr a ticket meter output.
And it drives a 12V meter.
DON'S
VI DE 0
CORNER
8 Line
Machines
Don Powell
I used a couple of diodes to iso-
late the meter pull-up voltage
from the game board pull-up
voltage and visa versa.
PROCEDURE
• First, cut the notch output
wire.
• On the side going to the
. ticket dispenser board, at-
tach the cathodes of two di-
odes (1N4001, 1N4002, etc.).
• Connect the anode of one
of the diodes to the notch
wire going to the game.
• Connect the anode of the
other diode to one lead of a
12Vmeter.
• The other lead goes to 12V
( or if you want use a SV
meter, connect the other
lead toSV).
• Finally put a third diode
across the meter for fly-back
protection ( cathode to 12V
or SV).
DON'S VIDEO REPAIR
Shelbyville, Tennessee
CHERRY
MASTER
CLEARING
THE
RAM
SYMPTOM
Blown diodes.
CAUSE
Remember to turn off the
game before attempting
to clear the Ram.
PRECAUTION
If you don't, you can eas-
ily blow the diodes in lo-
cations D 1 and D2.
-----------------1-----------------
Future scanning projects are planned by the International Arcade Museum Library (IAML).