RoboticsConnection User Forum / RoboticsConnection Hardware Support / General Hardware Support

Voltage For 4 Servos and 2 Cams

Doom1992 — Wed, 30 Jul 2008 06:57:56 GMT

Hello there. I would like to plug in 4 digital servos and 2 cams into my serializer board. Can i just use a battery to power all of these through the serializer power connectors onbord? If not what hardware will i need.

Thanks

Does the ICOP-eBox have an internal fan ?

deimos — Thu, 26 Jun 2008 15:20:45 GMT

Thanks,

CMUcam2+ Wiring and Service

GSM — Mon, 02 Jun 2008 09:00:51 GMT

Hi, I have connected the CMUcam2+ to the traxster CMUcam2+ turret as per the robotics connection documentation. However the documentation does not detail how to connect the CMUcam2+ to the Serializer WL board. Are there instructions available for this?

Also, does anyone know if there is a CMUcam2+ .NET service available?

Also, is there a download site for the CMUcam2+ drivers? I have checked out the http://www.cs.cmu.edu/~cmucam2/downloads.html site and there is the GUI app, but no details of the drivers or how to manually setup a COM PORT.

Thanks for any help you can provide, Greg

Bad gearhead motor?

pirobot — Thu, 22 May 2008 11:25:27 GMT

Hi Jason and Company,

I bought a couple of your gearhead motors a few weeks back to use on a small wireless robot controlled by the Serializer + Bluetooth module. I started noticing that one of the motors didn't always turn at the same speed as the other even though I was using a TravelAtSpeed command. Some times it barely turns at all. When I turn the slow motor by hand, it is noticeably harder to rotate than the other motor. Also, if I let the Serializer run TravelAtSpeed for more than 30 seconds or so, one of the chips (H-bridge?) on the side of the bad motor gets very hot (and starts to smell!).

Does this sound like a bad motor or bad controller?

--patrick

Used Dynamixel Sensors

alzb92 — Sun, 23 Mar 2008 08:09:05 GMT

Hello, everybody!

I would like to know if someone would have an idea about how I could use sensors that use Dynamixel "TTL level Half-duplex UART."

In fact it would be how do I find a card that converts a signal to a signal I2C TTL.

Thank you in advance for the help that you will help me.

what is the voltage trushold for the signal for GPi/o port?

xmilkbarx — Tue, 15 Apr 2008 18:38:22 GMT

hi i will like to know what is the voltaeg that the gpi/o is transmitting. can anyone guide? because i am am trying to allow my robot to fire a row of LED, and my transistor minimum is 0.8v, is the board giving out that much voltage?

10 AMP H-Bridge Connections

autosnowblow — Thu, 10 Apr 2008 12:04:23 GMT

Hi,

I am trying to use the 10 Amp H-Bridge to drive two motors. I haven't been able to get a test motor to operate, and I am not sure about the connections because I can't find a datasheet.

12V: to positive 14 V power supply
GND: to negative 14 V power supply
VCC: to positive 5V power supply
PWM1: 5 VPP Square wave, 50% duty cycle
DIR1: to positive 5V power supply
DIR2: Not connected
PWM2: Not connected
Enable: to positive 5V power supply

The motor doesn't seem to be getting an output from the H-Bridge. I tried to adjust the duty cycle between 25-80%, but the motor still doesn't move.

Is there a conventional setup/settings that work?

Thanks.

How long can I use this robots if I have full capacity of battery?

jsummerour — Sat, 19 Jan 2008 19:18:42 GMT

How long a robot will operate on a fully charged battery depends on several factors, and we're by no means experts at this.

First of all, you need to know the capacity of the battery in Amp Hours (or milliAmp Hours). You also need to know how much current the components on your robot pulls. For example, a Stinger Robot Kit, retrofitted with a Serializer, and some Infrared Sensors might pull around 1 Amp to operate.

Once you know how much current your robot requires, and the capacity of your batteries, you can calculate *theoretical* run times. This of course is always more that the actual run times. :) I'm sure it also differs based on battery technologies.

Here are some quick links for battery run-time calculations I found searching google on this topic.

http://www.gizmology.net/batteries.htm

http://www.dg2k.co.uk/battery-appl.htm

To give you a rough idea of run-times for our robots, we've had a Stinger + Serializer + IR Sensor last a little over an hour and half, following a line around a course using a 2200mAh 9.6V NiMH battery.

Best Regars,