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Adam Honse
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Any chance Ubuntu MATE could include the Human themes from the pre-purple Ubuntu releases (6.06-9.10)?  I really liked that theme and since MATE is basically GNOME 2 and compatible with those themes it would be perfect for a retro-Ubuntu system.  It would be even cooler if those themes would support GTK3 as well.

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H-Bridge Complete!

After my previous design burned out transistors, I redesigned my H bridge around the TI SN754410 1-amp H-Bridge IC and used it to drive a larger H-bridge of MOSFETs.  Resistors are used to pull the MOSFET gates high/low when the H-bridge IC is disabled, shutting the output off entirely.  The enable line can then be used for PWM speed control.
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Robot Build! (4 photos)
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Laid out a PCB for my robot's motor controllers, design from here: http://letsmakerobots.com/node/24086?page=1
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Robot Build! (6 photos)
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Robot base almost complete, it's ready for wheels!
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Robot Build! (3 photos)
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After reading about the use of cordless drill motors in robots, I decided to attempt a three-wheeled platform inspired by Missouri S&T 'bots Aluminator and Jomegatron of my own.  For $60 at Harbor Freight I came home with two 10" wheels, a swivel caster, and two 18V cordless drills.  I promptly disassembled the drills to harvest the motor and gearbox, desoldered the switches, and attached longer wires to them.  Each motor/gearbox is around 8" long (including chuck, which I am leaving on) so my 'bot will likely be 18" wide (adding 2" in between the motors for wiring).  The caster will be centered at the rear with the battery (either paralleling the two 18V NiCd packs or a 12V SLA) rests in the middle, keeping the center of gravity in the middle of the robot.  I want it to be wide enough for a laptop to sit on top, and also want to add a camera mast with USB webcam for remote driving and maybe autonomous driving.

The frame is all going to be made out of wood, with a plywood base holding everything together.  The base is going to have the rear corners tapered down (think Best Buy logo).  The motors will be mounted to the bottom of the plywood base.  Plywood sides will be used that will protrude above and below the base, covering the motors and holding two bearings to support the axles for the wheels (not sure what I'm going to use for axles yet).  Above the motors, on the top of the base, will be two H-bridge PWM drives that I plan to build with ATTiny2313 microcontrollers.  I also want to come up with some sort of encoder, probably a simple optical sensor, maybe paint alternating white/black stripes around the drill chuck and read it with an IR or visible light sensor.

I also want to add a mounting bracket of some sort to the front of the robot to attach accessories (arms, tools, vaccuum hoses, weed whackers, etc).  This would also likely include a port for power and data to control the attached accessories.
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Robot Build! (8 photos)
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Packin' up, I'm movin' this!

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Ugh, I hate this apartment. Not because it isn't a nice place, but because they pull Internet from the college and the college has the most abysmal excuse for Internet I've ever seen. No external IP's and it shut me down for playing TF2 for more than 5 seconds. I reconfigured my router and spoofed my MAC and now have my own subnet (of their subnet of the Internet...seriously?) but it seems to at least work...stupid place! I guess that's what you put up with at non-engineering schools, but why Caterpillar sticks interns here I'll never know.
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