Adaptor for Apple ][
computerseries to be used with either Apple-Joystick or PC-Joystick
- and additional 4-Bit Connector to Annunciators
Nowadays not all Apple-fans have access to the original Apple-Joystick do
it might be usefull to create an adaptor
the enables these people to use instead a common PC-Joystick......
This description shows how to make such an adaptor and besides offers to
create a version that permits the use
of one of both kinds of joystick and besides it permits to add a further
plug that gives access to the 4 annunciators
of the gameport - they may be used with external electronics to switch by
softwarecontrol from the computer
and few external electronics external devices. Per Switch only one
transistor and a relay is needed in the most
simple version. You can switch up to 16 devices if you add a decoder and
few additional electronic parts.
This permits for example to make a burglar-alarmset by computercontrol or
a lightorgan for the partyroom.....
Some examples for such projects will be added within the next weeks.....
in ealier schooldays such projects
have been rather common to learn how to programm a system as
controlsystem... so it is quite good idea to
add that connector to the adaptor....
In the picture below each line is desplayed in one single
color - allthough different colors may cross eachother
the connections only exist within one single colorshade -
never connect any of the
different colorshades together !
First Update :
here i introduce the PCB that might be used for the experiments and
that will be introduced in the update No.4
the purpose is to start allready with the creation of the PCB
that will be used in the further updates !
The PCB contains:
1 x 16 pol DIP Socket
2 x DB 9 Plug female
1 x DIN 5 pol Plugconnector
1 x 24 pol DIP Socket
1 x 74LS154
16 x Transistor BC337 NPN midpower 625 mW 50 V or SD 667
16 x 1 N 4001 SI Diode 50 Volt
16 x 5 Volt Relay ( 2 x Maker / Closing switch 110 Volt
USA / 220 Volt Europe )
as low as possible
needed power to activate ( 150 mA if possible ! - but not more
than 250 mA ! )
[ otherwise a
external powersupply must be used and the 5 Volt powerlines from
truncated ! ]
16 x 4 pol screwed connection block
2 x 15 pol. pinstrip
1 x 16 pol. pinstrip
Here comes the next
with the introduction of the "Piggy-Pack-PCB"
itīs designed to be pluged on the top of the Base PCB introduced above.
Itīs first purpose is to display the state of the switches with LEDS
so the status of the
softswitsches AN0 to AN3 and the Pushbuttons PB0 to PB 3 are
indicated by red
LEDs that turn on, if the line is "High" and it also shows by LED
which line of the
16 outputs from the 74LS154 is turned on by switching to "LOW".
The other part of the extension provides the user with the
possibility to connect
different devices to the Pushbuttonlines and it gives access to the
of an "open joystick" as well as the ability, that the 74LS154 may
with so called "Solid State Relays"instead of normal Relays on the
Solid Stae Relays do not use that much power from the powersource
more simple in use ( but indeed they are more expensive ! )
With this expansion we will proceed with new coding and we will
solve some experiments
with devices like Reed Relays, which are used in
home-security-systems to keep doors and
windows under survilience. We will also do some experiments with
the variable resistors to
learn something about positioning coontrol which is used in devices
So lets start at the
moment with the "Piggy-Pack-PCB":