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Free Motor Controllers!

By Krumlink

August 2, 2011
Krumlink's picture

I am currently designing some very budget friendly Motor drivers, and to test the design out, I am giving away 10 free drivers! Each driver is a single or possibly dual (5 single and 5 dual) transistor based design, and cost per board is very, very low. If you would like one of these free driver boards, please post in the forum below. No restrictions! Each board ships with a application note so you know how to use it.

A few specs:

Max Voltage: 30V

Max Amperage: 0.6A

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Tip/walkthrough

Free Servo force sensor

Uses the servos potentiometer to detect resitance on a gripper.
Using a
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 Collected by 11 members
 
I soldered a wire to the middle pin of the potentiometer inside the servo that operates my gripper. Using an analog pin, I can tell when the Servo isn't moving. I … Read more
Chowmix12's picture
Chowmix12
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Blog entry

Free day...

By dent

November 27, 2009
dent's picture
Hey, so you've all heard of Free day over at SFE right? Doubtless everyone on LMR is participating, but I would just like to point out something. Buy only what you need. Try not to spend all 100 bucks available to you! Save some for others! If we all used 100 bucks, there would only be 1000 slots. If we used less, say 50 bucks, more people could join in! So please, just remember: This is a gift from Sparkfun. Please don't take advantage of it. Thanks!
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Forum topic

FREE!

By robologist

November 23, 2009
robologist's picture

Just saw this posted, scheduled for January 7th. Hope I can get some toys here :

http://www.sparkfun.com/commerce/news.php?id=305

 

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Forum topic

Would anyone be interested in an XMOS challenge?

By xmos

June 29, 2009
xmos's picture

UPDATE: If you have a YouTube account or use YouTube, add/view our "MyXMOS" channel for latest videos and XMOS news!

 

UPDATE:

The 9.9 version of the XMOS Development Tools is now available:

Embedded video: 
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Blog entry

8087-S1

By Rudolph

June 10, 2009
Rudolph's picture

aka Rudolph's Noisemaker Tool for Arduino

I wanted my current robot project to make cool bleeps bloops and other stupid noises. Instead of just doing it I spent three days writing software to make an easy job "easier". Well, okay, I spent two days doing it wrong, then switched to Python and tried again. This package is the end result. It consists of an Arduino sketch that makes noise from numbers, and a GUI Python frontend to make it "clickier" (oooh).

Project: 
812-R3
Forum topic

12vdc 5 Relay Board - WHO want IT!

By pravoka

May 26, 2009
pravoka's picture

Hi LMR's

I giving a way 2 of this nice 10 relay boards. Salvaged from working a control system to be discarted.

They are 12 vdc coils drived by 2 ULN2004, also have indicator power led and filter in the OUTs.

The board measures about  3.25 x 4.0 inches.

I hope that 2 of you people can use them.

 

Update------- They are SPST, one make by relay.

DSCI0919.jpg

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Forum topic

FREE photoelectric sensor sample

By Zanthess

January 29, 2009
Zanthess's picture

I'm such a glutton for free sample stuff!

 

http://www.idec.com/usen/publish/S51b/index.html

 

All you have to do is tell them what you plan to use it for and they'll send you one. Kinda nifty I think.

 

Now I'll have to think up a project....

Component

Free flat sticks "Painter-sticks"

Price: $0 USD
 
I don't know how it is in other countries than Denmark regarding this. But in Denmark you can just walk into any shop / supermarket that sells paint, and grab as … Read more
fritsl's picture
fritsl
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Blog entry

Easy Freebie LEDs

By psy

May 23, 2008
psy's picture

A quick tip for all you cheap skates out there. I've always had it in my head that I would like my robot to have no permanent connections, to allow me to experiment and reconfigure. This also has the nice side effect of less soldering for me to mess up. I actually have a cunning plan to pay my flatmate in jelly beans to do the tough bits for me; he's an electrical engineer (rock!).