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Mechanics and Construction / Need help finding the pitch of a pinion gear
« Last post by pterrus on Yesterday at 07:56:02 PM »
My project to turn an RC truck into a robot is coming along nicely (http://imgur.com/533aEgH).  There's a major problem though that in retrospect I should have anticipated: the toy drive motor no longer has enough torque to drive the added weight.

My plan is to buy a good gearmotor from servocity or something to replace the old motor: (http://imgur.com/7FcxN51).  I'd prefer to leave the old gearbox intact and just swap out the motor because that's clearly way less work, but the pinion gear appears to be permanently attached to the old motor shaft and I'd need a replacement.  So I need the pitch.  I've read that pitch is equal to the number of teeth that would be on a one inch gear, but this gear: (http://imgur.com/70ZALxD), which is just under an inch in diameter, has 34 teeth... it seems to be a nonstandard pitch?

I am an electrical guy and kind of clueless about gears... any advice on what to do in this situation?
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Misc / US Court of Appeals rules drones for search and rescue is legal
« Last post by Admin on Yesterday at 01:03:54 PM »
admin comment: The FAA bans drones because it risks deaths from aviation accidents. But to ban search and rescue with drones is counter-productive to that stated goal.


Back in February, officials at the Federal Aviation Administration told a Texas search-and-rescue team they couldn't use drones help locate missing persons. The team, which is called EquuSearch, challenged the FAA in court. On Friday, the court ruled (PDF) in favor of EquuSearch, saying the FAA's directive was "not a formal cease-and-desist letter representing the agency's final conclusion." EquuSearch intends to resume using the drones immediately.

http://arstechnica.com/tech-policy/2014/07/search-and-rescue-drone-mission-readies-for-takeoff-after-defeating-faa/

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Mechanics and Construction / Re: Microphonestand-robot
« Last post by Gededyr on Yesterday at 02:31:29 AM »
It's just the microphone I need to move. Well, the mic need to be held steady and in a useful position. Just like a microphone stand :)
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Mechanics and Construction / Re: Microphonestand-robot
« Last post by DiegoChavez on July 21, 2014, 09:19:17 PM »
Is it jsut the mic. or do you have to carry something else on the robotic platform?
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Electronics / Re: Robotic arm that copies human arm
« Last post by DiegoChavez on July 21, 2014, 09:12:02 PM »
I found an instructable to do one A LOT better It is based on the In moov 3d printed hand. (you dont need to have a 3d printer) you can use Shapeways.com just send the files and they send you the printed parts.

here is the link: http://www.instructables.com/id/DIY-Robotic-Hand-Controlled-by-a-Glove-and-Arduino/?ALLSTEPS.
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Electronics / Airsoft robot fireing system
« Last post by DiegoChavez on July 21, 2014, 09:05:50 PM »
I am making an airsoft robot, and I need a way to fire the gun. The gun I got is a cheap crossman because it uses low power and can hold a lot of ammo. It is powered by 4 AA batteries. I am thinking on taking out the batteries and connected to some type of relay boar or something connected to the receiver. But I dot know how to do it. I have a spektrum 5 channel transmitter so I only have the landing gear switch left. I need that to fire the gun. Any ideas???
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Mechanics and Construction / Airsoft robot fireing system
« Last post by DiegoChavez on July 21, 2014, 09:04:46 PM »
I am making an airsoft robot, and I need a way to fire the gun. The gun I got is a cheap crossman because it uses low power and can hold a lot of ammo. It is powered by 4 AA batteries. I am thinking on taking out the batteries and connected to some type of relay boar or something connected to the receiver. But I dot know how to do it. I have a spektrum 5 channel transmitter so I only have the landing gear switch left. I need that to fire the gun. Any ideas???
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Electronics / Re: battery pack charger - DIY
« Last post by waltr on July 21, 2014, 12:11:21 PM »
What chemistry does that battery use? This is very, very important if you do not want the battery to burst into flames.
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Misc / Re: FAA bans FPV (1st person goggles on drones), call to action
« Last post by dellagd on July 20, 2014, 12:46:47 AM »
Yes! Please do! I and many others have learned so much through this hobby and it feels like its becoming illegal now because of some idiots who made the wrong person unhappy. Let's try to retain the legality of a great hobby. :D
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Robot Videos / Meet daisy - an autonomous obstacle avoding robot
« Last post by SPD42 on July 20, 2014, 12:34:17 AM »
Daisy is an old “Discovery Kids” projection alarm clock turned into an autonomous obstacle avoiding bot with an Arduino Mini "brain".  The roboy uses 4 obstacle sensors (3 infrared and one ultrasonic) to detect obstacles. Usually my bots look like a cat played with a ball of wires, so I tried to give this one some personality...

Daisy - an autonomous Arduino based roaming robot.


http://42bots.com/showcase/daisy-an-arduino-autonomous-obstacle-avoidance-robot/
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