8 channel DMX to TTL driver - Mobolazer Lil G-Beam motherboard
I am selling a mobolazer gbeam motherboard that can be used to rebuild/DIY a mobolazer or can be used as an 8 channel DMX to TTL driver.
Requires 5Vdc input, has DMX input, and controls 8 channels of output. Each TIP120 transistor output was used to drive an actuator for beam steering. Actuators not included. Board also has lm317T based adjustable output diode driver (G-Beam originally had 5mw 532nm) with TTL modulation input. I measured LD output current 38.5ma min to 77.8ma max. Output current may be higher because the red 20mw I used for a test load probably doesn't draw enough current to max out the driver.
5V DC output is also provided on header pins for DC Fan - I measured at 4.92Vdc.
Check out a video of the board in action driving 8 LEDs for testing - #1 http://youtu.be/XVWRRrlXR-Y #2 http://youtu.be/5NUZtIG8pr8 The board is running DMX from my USB DMX DONGLE.
I made the 8 LED bar-graph to test the outputs w/o having to put it in one of my G-Beams. The LEDs are not included.
On the board I'm selling, the trim pots have been replaced with jumper wires since the fine adj was not needed for simple on/off of effects (originally had trim pots on each output channel to fine tune actuator positions - easy to remove jumpers and replace with trim pots)
For Sale $50.00 + $5.00 Priority Mail. I will also include a printed copy of the board schematic if you want, which I traced from the board and redrew in a PCB layout / schematic CAD program.
I have copied the EEPROM contents and I'm waiting on a new EEPROM delivery to burn the contents as a backup copy. I have not tried to look at the assembly code yet, but if you're interested in the binary file send PM. I also have generated a parts list / bill of materials which I can print out as well.
PM me if you are interested. In addition to cash, I am always open to trades for anything from High End Systems / Lightwave Research old Laser Chorus / Viper such as HeNe tubes, beam stop solenoids, empty cases, power supply bricks, extender board - have seen the schematic but have never seen one or even a picture of one, cables, laser heads & laser head parts, etc.
I mostly lurk here and not well known on PL, so I can list these on Ebay if needed for "Ebay Buyer Protection". I'm djeric68 on EBAY and have 100% positive feedback w/ over 400 transactions.
Eric in New Orleans
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