This follows the remaster of 1998 classic, Battlezone, with Battlezone 2 set to receive similar treatment.īattlezone: Combat Commander comes with new visuals, better mod support, cross-play online support between Steam and GOG for 14 people, achievements, and cloud saves on the Steam version of the game. This is the same tube that I started experimenting with last year.Rebellion have revealed that they will be remastering Battlezone 2 for the new Battlezone: Combat Commander in 2018. The glass is extra thick because the tube was designed to be handled more. This CRT would originally have been used by a TV technician to look for problems with the chassis or the full size picture tube in a customer’s set. I also build a second unit with the same driving circuit but a different CRT–a 5-inch round 5AXP4. The joystick handle on the right is hollow to allow the wires for the fire button to pass through. It took some experimenting to figure out how to arrange the springs to get the joystick to return to the center position. The joysticks I machined out of small aluminum blocks. The board to the right of it is an audio amplifier that drives the speaker. The green board in the upper middle is an STM32F4 Discovery board. I’m not totally happy with the design but eventually I will release the board design. It is based around an LM4765 audio amplifier IC. At the bottom right is my new magnetic deflection amplifier board which drives the deflection yoke. Outside the shield you can see the video amplifier board at the lower left, which is the same circuit used on my electrostatic deflection board but without the deflection amplifiers. They are open-source hardware so you can build your own. These last two power supplies are detailed here. Another steps +12V to +1KV, and the final one steps +12V up to +60V. There are three power supplies: one steps 120V down to +12V, +5V, and -12V. It works a bit, but I’ve had better luck in the past with mu-metal shields around the CRTs themselves. The metal enclosure houses the power supplies–it is made out of soft steel with the idea of containing the stray magnetic fields generated by the power supply switching inductors. I’m running this CRT a bit under voltage, and it works fine because I’m not trying to fill the whole screen with a solid raster. The upper board is a Cockcroft-Walton multiplier circuit to step up the 1KV power supply voltage to the 4KV necessary for the post-deflection acceleration (PDA) anode. The lower circuit board in the photo is a potentiometer resistor divider that develops a ~300V bias voltage to drive this additional grid. For the curious, it uses an EIA E7-91 style base which has an additional grid for acceleration purposes. The CRT is a bit different than most of the old-style CRTs I work with. The horizontal windings were already pretty close, but they did need to be rewired to operate in series to reduce the drive current. I had to rewind the yoke to make the vertical windings fast enough to handle vector graphics. It uses a 5-inch B&W CRT taken from a broken security camera monitor. Well, it’s now installed in a mini Battlezone arcade cabinet that I built for Maker Faire this year. If you follow me on Twitter, you’ve probably seen the picture of a CRT deflection yoke undergoing surgery. Battlezone – Mini Vector Arcade Machines 2:16 pm eric Projects
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