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91  General Category / General Discussion / Re: Relay 5v for arduino on: May 30, 2013, 12:30:03 pm
The product (from ebay) mentioned in the OP's post is able to be controlled without using transistors. Just hook it up straight.
92  Using Arduino / Motors, Mechanics, and Power / Re: I am looking for a stepper motor driver that can handle up to 5A on: May 24, 2013, 06:33:44 pm
At a buck an amp this might be worth a try.

http://robokitsworld.com/index.php?main_page=product_info&products_id=15
93  Topics / Robotics / Re: Micro Robot Arm: Question about arm joints on: May 17, 2013, 11:35:25 am
Maybe something like this might do.

http://www.pololu.com/catalog/product/69
94  Topics / Robotics / Re: Need Help: 6wd WT w/ 6dof arm on: March 09, 2013, 12:12:50 pm
Have a look at this:
http://www.circuitsathome.com/mcu/robotic-arm-inverse-kinematics-on-arduino
95  Using Arduino / Motors, Mechanics, and Power / Re: how to make 4 wires system of Unipolar Motor control into 2 wires on: February 17, 2013, 02:57:19 pm
It can be done using a couple of logic chips.
http://neil.fraser.name/hardware/stepper/ttl.html
96  Using Arduino / Motors, Mechanics, and Power / Re: Holding an 11 mm shaft with non-metric pillow blocks on: February 02, 2013, 09:51:43 pm
For press fit stuff like bearings in housings heating the housing and putting the bearing in a cold environment before assembly would be used depending on circumstances. But has been mentioned just slitting the bronze sleeve (hacksaw or whatever) will allow the sleeve to go into the pillow block. If you are using collars on the shaft or whatever is attached next to the pillow block then that would keep the sleeve from coming out.
97  Topics / Robotics / Re: Robotic Arm Project on: January 14, 2013, 01:31:20 pm
Take a look at this

http://www.circuitsathome.com/mcu/robotic-arm-inverse-kinematics-on-arduino
98  Using Arduino / Displays / Re: Serial LCD on: December 30, 2012, 05:38:38 pm
Parallax is trying (somewhat) in getting their products to work with the Arduino so it takes a little digging to find stuff.

They have  "Kickstart" (which looks like it has been moved recently) but it looks a little thin in programming examples for now.

Here is the page. http://learn.parallax.com/KickStart/27977
99  Topics / Robotics / Re: help with the maths of a simple robotic arm on: December 01, 2012, 05:17:38 pm
Take a look at this and see if it will help you.

http://www.circuitsathome.com/mcu/robotic-arm-inverse-kinematics-on-arduino
100  Using Arduino / Microcontrollers / Re: Using external ADCs with higher resolution than the MCU itself. on: November 27, 2012, 07:40:10 pm
Take a look at this appnote from Atmel.

101  Using Arduino / Project Guidance / Re: sort of delta robot/polygraph on: November 21, 2012, 03:57:16 pm
The tube being fixed at one end and the other end of the tube moves then the moving end becomes a point on a sphere.

Look into spherical to rectangular conversion.
102  Using Arduino / Installation & Troubleshooting / Re: Breadboard Arduino (ATMega328p) upload problems on: November 20, 2012, 07:50:01 pm
Don't know if a 1pf cap versus a .1uf (what your Pro Mini has on it) matters but the .1uf has an order of 100,000 times over the 1pf.

You might want to try and kick your cap up a bit. Just use a tpyical bypass cap.
103  Using Arduino / Project Guidance / Re: sending of spoofing FM signals to a RC car ? on: November 20, 2012, 05:06:21 pm
There probably is an "arming" sequence to allow the control of the motor. You don't want the car to take off as soon as you plug the power in.
104  Using Arduino / Installation & Troubleshooting / Re: Breadboard Arduino (ATMega328p) upload problems on: November 19, 2012, 10:39:36 pm
OK I'll throw out one more and I think this might be it (did a little looking at the pro mini).

On the pro mini it has the capacitor between the DTR and reset circuit. Take a look at the schematic for the pro mini.

Some people put the capacitor on the cp2102 end.

105  Using Arduino / Installation & Troubleshooting / Re: Breadboard Arduino (ATMega328p) upload problems on: November 19, 2012, 09:04:47 pm
OK I've done a little bit of trying stuff. I do have a CP2102 but it is a little old but I did get it to work (my settings page looks like yours). On looking at your model there was a thread about it (John was in the thread) and in that thread it was mentioned that the labeling was incorrect for the TX and RX (flipped). I don't know how you are hooking this up to your minis but I would stare really hard at how you have the TX and RX hooked up ( TX to RX and Rx to TX ) . Maybe a quick test is to hook up the TX line of the CP2102 thru a led -current limiting resistor-ground and see if there is activity on it when transmitting.

Here is that link:

http://arduino.cc/forum/index.php?topic=94754.0
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