- Joined
- Aug 2, 2011
- Messages
- 383
Hi
I wrote a post last year about a screen replacement I was putting together. Thought I'd do an update - it's now called DmdXPress as it's a basic, cost effective replacement for DMDs. However, it uses RGB LED panels, so whilst only monochrome, you can choose from Red, Green, Yellow, Blue, Magenta, Cyan and White - just press the button to change the colour.
I created a prototype board, which has now been turned into a production board - this is my first SMD board which I'm really pleased with.
Top is the prototype stripboard, and the green board below is the production board.
The board has an atmega328p mcu - this is basically an Arduino - which reads the button presses and controls some of the screen logic.
The black frame is 3mm perspex - this is a first cut with my laser cutter in 2 pieces, I currently have an order with RazorLab for a production version. The front of the screen has the LEDs protruding about 2.5mm - this is not enough to prevent light bleed from the backbox, so I've added a surround and cover to the size of the original glass on a plasma so that the fit should be like the original.
Here is the install in a Stern - the 5V from the original screen is simply connected to the new screen - it's pin compatible. There's also a power pass through connector - I'm hoping that for Stern Whitestar and DE / Sega games this should allow easy powering.
Here's an install in a WPC game - this uses a small power supply to get the 5V needed, I don't want to rely on the on-board 5V again. This is powered by the 110V supplied to the now redundant high voltage section of the DMD driver board.
I'll be working hard to achieve a basic price of £100 for Stern / Sega / DE, with an extra £20 for WPC with the power supply. This is a provisional price!
After this is going well I'll be looking at DmdXPress XL - this will be a replacement for the large Sega 192 X 64 screens. Price will be less than £200.
Cheers
David.
I wrote a post last year about a screen replacement I was putting together. Thought I'd do an update - it's now called DmdXPress as it's a basic, cost effective replacement for DMDs. However, it uses RGB LED panels, so whilst only monochrome, you can choose from Red, Green, Yellow, Blue, Magenta, Cyan and White - just press the button to change the colour.
I created a prototype board, which has now been turned into a production board - this is my first SMD board which I'm really pleased with.
Top is the prototype stripboard, and the green board below is the production board.
The board has an atmega328p mcu - this is basically an Arduino - which reads the button presses and controls some of the screen logic.
The black frame is 3mm perspex - this is a first cut with my laser cutter in 2 pieces, I currently have an order with RazorLab for a production version. The front of the screen has the LEDs protruding about 2.5mm - this is not enough to prevent light bleed from the backbox, so I've added a surround and cover to the size of the original glass on a plasma so that the fit should be like the original.
Here is the install in a Stern - the 5V from the original screen is simply connected to the new screen - it's pin compatible. There's also a power pass through connector - I'm hoping that for Stern Whitestar and DE / Sega games this should allow easy powering.
Here's an install in a WPC game - this uses a small power supply to get the 5V needed, I don't want to rely on the on-board 5V again. This is powered by the 110V supplied to the now redundant high voltage section of the DMD driver board.
I'll be working hard to achieve a basic price of £100 for Stern / Sega / DE, with an extra £20 for WPC with the power supply. This is a provisional price!
After this is going well I'll be looking at DmdXPress XL - this will be a replacement for the large Sega 192 X 64 screens. Price will be less than £200.
Cheers
David.