Changes and additions to Indiana Jones pinball.

Before you read this article, please check Roc Agrwal modifications on his homepage .................

After reading his site, I made these changes to my I.J. When looking for the electric engine needed, I found that the motor of a cd-rom drive is very well suited. It is small, easy to find and very cheap as it can be found in old-dump cd-rom drives. They are very small and work well at 5volt......

The motor is so small that it will fit in the body of the airplane. I glued it with silicon glue, so it is possible to remove it afterwards without damage. By using this method you do not have to bend, change, drill or make any modifications to the airplane itself....

This is the airplane, and motor with ball-point attached. The original wire-support is still present.

The engine glued with silicon glue.

All done !!

For the finishing touches please check Roc Agrwal's site.

While I was making these changes I tought of doing something with the messerschmitt...... thus I had the idea to add led's as machine guns.

This is an easy fix: take the messerschmitt out of the pinball, take notice of how the wires are connected to the existing leds, which you will need to connect again....

Add two flashing leds on stiff wires as seen in the image, the leds are about 15cm apart from each other...

Glue them with silicon glue, and to hold them in place I use 'crocodile pins'..

Bottom of messerschmitt.................... with the leds in place..

Everything glued with silicon glue and it's done !!!!!!

Put the messerschmitt back in the machine in its original position. Solder the 2 original wires back on, and run the new wires to the timer-circuit using existing holes in the playfield.

Roc Agrwal uses a timer-cicuit from a Gottlieb pinball machine. As I didn't have one of these, I found it much easier to create one myself, only 9 parts are needed and it is a small construction (2inch by 2inch)

This is the schematic.....

The 9 parts are:

4 resistors: 490kohm 1,2kohm 1,5mohm and a resistor in series with the output towards the leds ; from 1kohm to 470ohm depending on how much light you prefer.

3 condensators; 10 F 10nF and 100nF

2active parts ; Ic = NE555, 1 NPN transistor I use tip110 but it can be any NPN transistor out of a "junk-box" .

Put everything on a piece of universal print, and connect to the 5 volt like in Roc Agrwals example......... Two connecting points for the ramp-switch, and both outputs, one to the little motor and one to the leds of the messerschmitt.....

As you can see wile the rotor turn both flashing-leds on the messerschmitt receive 5 volt and flash....

When presenting this to Roc he asked to use the existing red leds of the messerschmitt. This is not possible, because they are connected as flash-lamps in the pinball , and too drastic changes are needed.......

Success to all and you may always mail me should you need assistence...

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