Let's Make Robots!
I had to build a robot just to test a board... I wanted a nice, simple 08m board to play with so I made one! It is not too shabby, if I do say so myself and quite … Read more
Probably one of the most handy chips that can be found in the Picaxe line-up is the tiny 08m --and now, with the new 08m2 available, it is just that much more … Read more

Need Metric Person to Measure A Pencil For Me.

Are there metric pencils?

If there is someone out there in the Metric World that has a set of calipers, I would really appreciate it if you could measure a pencil for me. Just a regular pencil, the most common one you would find in your particular country. Please measure from point-to-point or corner-to-corner to get the widest part of the hexagonal. Do not measure flat to flat.

I could really use the measurement to the 1000th (ie .000) and I would take it in either SAE or CM. Oh, and I would be curious as to where you are too. 

Drawing, Steppers, LMR Challenge and it works!

Well how 'bout that, it sorta works. I don't know if I am going to kit this one or just have fun with it, but either way, here it is.

I still need to finish the lift mechanism for the pen, but other than that, 100% solid. Woo Hoo!

 

Arduino Nano UnderShield is Available

 

It is ready! It is ready! The Nano UnderShield is ready!

 

Everyone else is doing it HC-SR04

Ok, Ok... You convinced me! I broke down and bought a few of these El Cheapo SRF05 knock-offs (HC-SR04). It was Jax saying he got his working that put me over the top. Now the real question is  --is there any way to convert this 4-pin set-up to a 3-pin set-up? Currently, trigger and echo are on different pins, is there any way to connect them? I figure diodes would be in order, but for the life of me, and after a bunch of sketches, I can't seem to figure it out. Thoughts?

The Arduino Nano Undershield is simply perfect for small, simple robots with everything you need, and nothing you don't. Start with an Arduino Nano, featuring an … Read more
    I introduce you to the RocketBot Family of Robots. Read more

What would you call a "Wiper"

I have searching mouser for 1/2 hour now and for the life of me, I can not figure out what to call one of these things. "Wiper" gets me nowhere. I am looking for a small copper contact, sorta springy, that would ride along an exposed trace on a PCB. Specifically, I am trying to transfer power through a rotating joint. This would involve 6 concentric rings etched on a pcb with a 6-pronged "wiper" on the rotating part above.

What is the fancy name for these things?