Category Archives: Robotics


For Christmas 2011 Pictometry had a holiday “Throwdown” challenge. Each department was given box of miscellaneous items that had to be incorporated into some sort of creation. The box was handed off from one engineer to the next. Everyone was too busy. Finally, with two days left before the judging, it was time to take action. With much help from my fellow engineers I built TreeBot, a remote control Christmas Tree with all the trimmings and wireless video for remote operation.

It consists of my old Duratrax Evader RC car with a Christmas Tree mounted to it, Christmas lights on a power inverter, an iPod Shuffle playing Christmas tunes on an amplified speaker and a 2.4 Ghz video transmitter for remote operation. It is decorated with various items we had to use in our creation. We came in second place behind Finance who did a Christmas Carol play using the items as props but I feel it was a good entry representative of engineering given the time constraints.

Here is a video of the TreeBot in operation.

I took some pictures of TreeBot as I took it apart in case we decide to build something similar next year:

Review: Herbie the Mousebot Kit by Solarbotics

5 out of 5 stars


I wanted a quick, easy to build robot kit to get back into electronics and robotics. I ask for a Herbie the Mouse Bot for Christmas and sure enough I got one. It was a fun kit to build and went together in a little over an hour.

You start off with a PC board…
Herbie the Mousebot by Solarbotics

… and a handful of components…

Herbie the Mousebot by Solarbotics

You break apart the PC board which serves as a PC board and a body for the mouse which, is pretty cool.

Herbie the Mousebot by Solarbotics

The PC boards join together via several solder joints. Tape is used to keep everything together until you are done soldering. A smaller board that holds the 9 volt battery connector helps keep the three main sides together. By the time you are done soldering all the joints it is a pretty sturdy little robot.

Herbie the Mousebot by Solarbotics

Herbie the Mousebot by Solarbotics


The whiskers and tail activate a relay when bumped so the mouse will backup to avoid getting stuck. I taped the relay down while I soldered it in.


Herbie with the photo diode “eyes” installed….


Herbie just about finished…



Herbie is an interesting robot because it uses a simple analog IC, the LM386, to do something you might think requires a much more complicated digital circuit or micro-controller/processor:


Herbie the Mousebot by Solarbotics

We don’t have much open bare floor in the house and it moves quite fast so it was a bit of a challenge to keep it under control without hitting too much:

The Herbie Kit is well engineered and fun to assemble. I give it five stars and recommend it as a good first robot kit.

Review: Weller WLC100 Soldering Station

5 out of 5 stars

Weller WLC100 Soldering Station

I have started to take a renewed interest in electronics again lately and wanted to get a good soldering station to work with. I have a couple fixed wattage irons I use for my RC plane wiring but I wanted something adjustable with a variety of alternative tips available.

I ordered a Weller WLC100 and it is working pretty well for me so far. I also ordered some smaller conical and screwdriver tips that make it easier to solder smaller components and connections. One of the reasons I went with the Weller is because it is a relatively well know brand and I know I will be able to find tips for it.

There are more expensive solder stations that have digital controls and displays but I decided that an analog control was adequate. After using the station for a bit I am pretty happy with the analog control. The amount of heat transferred is so strongly dictated by the conduction of heat between the iron and the component/pad that I don’t know that such temperature precision makes much difference for most hobby uses. If you just tin the tip of your iron with a little bit of solder it will make significantly help with the transfer of heat from your iron to the component/pad you are soldering.

Weller WLC100 Soldering Station

The Weller iron is easy to grip with my fingers and doesn’t get too hot to handle at all. I built a Herbie the Mousebot Kit with it using a .062″ screw driver tip. It was nice to work with and did the job well. I would definitely pick up some smaller tips if you are going to be soldering smaller circuit boards. The screwdriver tip that comes with it is pretty nice but a small tip affords more precision.

I give the Weller WLC100 5 out of 5 stars. It is a good, relatively cheap soldering station with many tips available. Buy one and a couple tips to go with it:

Conical Tip, .031

Narrow SD Tip, .062