Next, I drilled a small hole into the post of the head so that I could put in a screw to hold the two halves together. A washer is needed due to the size of the hole in the head disk. I then selected a white (not blue) wide angle LED to face towards the player to produce the brightest spot of blue in the mouth plastic. One leg of this LED was held down by the washer, and then the body of the LED was glued into place.









The two halves of Robby ready to come back together.

The two halves of Robby ready to come back together.

I received a bracket for this robot courtesy of



After this, I prepared the body (now mainly empty) by glueing a bright yellow LED (a gift from Martin) that faced forward into the chest openings.I received a bracket for this robot courtesy of Cliffy . He made these for the original Masudaya robot mod.







Wiring Diagram of the LEDs. Wire colors for the lamp matrix

connections are shown.

Wiring Diagram of the LEDs. Wire colors for the lamp matrixconnections are shown.

The lamp column wire is the anode connection, and I put diodes in series (inside the body) to protect the LEDs from reverse voltage. I also put a 51 ohm resistor in series to control the current, but that was placed under the playfield for easy access to change the brightness.



When I went to wire the robot into the playfield, I found out that these three lamps are on a small board. This made it even easier to wire the robot into the playfield as I could remove the board to attach the wires.

I decided to wire the three new LEDs to the three lamps that are next to the image of Robby on the playfield. They happen to be on the same column of the lamp matrix, which makes it convenient for wiring. I only needed four wires for the three LEDs. I prepared a harness made from ribbon cable with a connector as I usually do to allow disconnection of the mod.The lamp column wire is the anode connection, and I put diodes in series (inside the body) to protect the LEDs from reverse voltage. I also put a 51 ohm resistor in series to control the current, but that was placed under the playfield for easy access to change the brightness.When I went to wire the robot into the playfield, I found out that these three lamps are on a small board. This made it even easier to wire the robot into the playfield as I could remove the board to attach the wires.

TZ TV Mod

The plan is to integrate into this ornament a digital photo keychain and load it with photos from the Twilight Zone episodes that are featured on this machine. The combined assembly would then be able to play a slide show of the particular scenes that inspired the machine's elements.









Each of these has a tie-in to the pinball machine, and

they are displayed in the above order.









TV with the back removed.







Once you are done, build the small circuit board that allows the keychain to be powered from the pinball machine. It is shown below.





The circuit board with the diode and test jumper.



The power leads from the pinball machine exit the above photo on the left. Connect a red alligator clip to the top wire, and a black one to the bottom. You then connect a diode in series with the power lead (banded side on the right) and solder it in. The result is that the diode drops the voltage from the pinball machine from 5.0 volts to 4.2 volts. Note that there are three solder pads in the bottom edge of the board above. Call them 'left' (ground), 'middle' (keychain supply), and 'right' (battery).

The circuit board with the diode and test jumper.





The electronics module inside the Insignia

keychain remote.







The small jumper on the diode board allows the reconnection of the battery, and is useful for testing the mod, or restoring it for loading of images.





The finished back of the TV mod. Note the three wires

exiting from the module, and their attachment to the diode

board.

The finished back of the TV mod. Note the three wiresexiting from the module, and their attachment to the diodeboard. The above photo shows the electronics module inside the keychain. Prepare it by desoldering the red lead from the circuit board of the module. Solder the red lead of the battery to the 'right' lead of the diode board. Then take a lead and solder the 'middle' terminal of the diode board to the location on the electronics module where the red lead _used_ to go. This will power the keychain when the machine is powered. Finally splice into the black battery lead (do not interrupt it), and solder that to the 'left' terminal of the diode board.The small jumper on the diode board allows the reconnection of the battery, and is useful for testing the mod, or restoring it for loading of images. The electronics module inside the Insigniakeychain remote. The first thing to do is to pry the back off. Then the protruding posts that held the back need to be cut down to size so that the little keychain can be mounted onto a plastic panel. The result is shown above.Once you are done, build the small circuit board that allows the keychain to be powered from the pinball machine. It is shown below. TV with the back removed. One side benefit of this project is all the episodes I watched on YouTube to fish these snapshots out. It gave me a new appreciation of the series, and I really liked seeing the look of the 60s (hair, car, and home styles, etc).



The assembled TV. It looks really amazing, just like a miniature TV. The first two

images show "Twilight Zone" in two zoom levels as shown in the thumb nails.

The image is extremely crisp and this image does not do it justice.





The TV mod mounted into the machine. Note the white paper in the back

to reflect the LED sequencer's light.



I have always wanted to dress up the back right corner of the playfield. The back left is lit nicely by the gumball machine, and there always seemed to be something missing in the other corner. This location seemed perfect for the TV. The mod needs to be mounted beyond the right edge of the DMD so that its reflection on the playfield glass would not interfere with the TV's screen. I made a bracket by using a small piece of Lexan that was glued to the top of the TV. The bracket is not visible to the player due to the overhang of the backbox. This is then screwed onto the top of the backboard so that the TV is placed at an angle facing the player. The mod is very easily removable and leaves just a small mark in a hidden area.



Once installed connect the red and black alligator to the gumball machine control board under the playfield. There is a ceramic bypass capacitor near the voltage regulator that is a good location for the connection.





30 of the images that I selected for use on the key chain.Each of these has a tie-in to the pinball machine, andthey are displayed in the above order.The assembled TV. It looks really amazing, just like a miniature TV. The first twoimages show "Twilight Zone" in two zoom levels as shown in the thumb nails.The image is extremely crisp and this image does not do it justice.The TV mod mounted into the machine. Note the white paper in the backto reflect the LED sequencer's light.







following mods of similar complexity:

Space Shuttle Toy

Medieval Madness Electronic Backboard



I got such a big response when

I decided to build them. Here is the first four.

They are installed without soldering.





Another batch of TVs. I ran out of the white connect wires, and these are grey.





This Ebay sale closed above $290 (item 280446813207).





It was just a matter of time! In January 2010, I had

an imitator trying to sell their version. No bidders.

Imitation is the sincerest form of flattery 8-).



This was from Rob Ventura, who now sells under the

Ebay name "pinballmodspinball". His design looks like a

straight copy of mine. Even the images displayed is the same

(although he did mention he would not use my files).





I subsequently developed an alternate version of this mod using a different

ornament. This one shows images from "Nightmare on Elm Street".

This version is also available for sale.





Video of the mod in action.



If you enjoyed this write-up, you may be interested in thefollowing mods of similar complexity:I got such a big response when I wrote about my mod thatI decided to build them. Here is the first four.They are installed without soldering.Another batch of TVs. I ran out of the white connect wires, and these are grey.This Ebay sale closed above $290 (item 280446813207).It was just a matter of time! In January 2010, I hadan imitator trying to sell their version. No bidders.Imitation is the sincerest form of flattery 8-).This was from Rob Ventura, who now sells under theEbay name "pinballmodspinball". His design looks like astraight copy of mine. Even the images displayed is the same(although he did mention he would not use my files).I subsequently developed an alternate version of this mod using a differentornament. This one shows images from "Nightmare on Elm Street".This version is also available for sale.Video of the mod in action. After I finished this mod, I did a Google search for "TZ TV mod", and found this TV mod at bumper.com . Although it shows videos of the series (without sound), it costs more than 15x the one described here, and has a 1.3" screen.

LED inserted into the head to light up the helmet.Finished head disk assembly. A screw is used to hold the LEDdown, and to join the two halves of the head.The completed robot, mounted on a bracket courtesy of Cliffy.The disconnect is made using IC socket pins.Note the other color accents on the robot's body.Robby installed into the playfield.Youtube video of the installed robot.Animated GIF showing the effect of the LEDs.Another ornament released for the 2009 Christmas season is a 60s style television with a Twilight Zone theme for $16.50 . I decided to use that for a mod.The original Hallmark Twilight Zone ornament. I removed the ornamenthook at the top by first twisting and then pulling it out.View of the top of the playfield. Note that the bracket is hidden. The new modlights up the back right corner quite well. The back of the TV is lit by thesequencing LEDs in a glittering fashion.YouTube video of this mod.