Let's Make Robots!

Transistors -[Page 3] Switches, common or uncommon

[Added note: while I had intended to add more to this series of pages, to explain FETs (jfet, mosfet, etc.) and so on, I have decided at least for now to not do so. I realised I would just be "reinventing the wheel" as the saying goes, when there are already so many good books on the subject.

Just a fun way to test yourself. This will help you know where you are lacking.
The idea is to match the statements with the appropriate drawing above. (Each drawing has a letter,) 1. Two zero pulses will make the LED light twice 2. Entering … Read more
One of my nephews said he had the idea of doing a painting with moving eyes that  would follow a person walking past.  He planned to put it at the bottom of a … Read more
This is the first page of an informative set of pages showing different ways to communicate with your robot.
The picture above is a 2 Watt Blue Laser I built several months ago. It's way too powerful for robot communications around the house (it would start fires), but it … Read more
It may not be obvious why I chose that picture, but radio is all around us and we just don't notice it that much anymore. If you look at those buildings, every one … Read more
  **Click the picture to show it bigger, and then click that picture again to make it big enough to read the fine print** ADDED (06MAY2012) This is the motor drive … Read more

A (VERY) Simple "Robot" (if we can call it that.)

One of our members ask how he could build a robot but lacked parts, money, soldering iron and so on.

I decided I would try to come up with the simplest way a small "robot" car could be done without all those things.

He said he had an old car he could use, and that he had some motors and wires.

Without a soldering iron connections can be made by twisting wires together. It is not a good way, but will work for a little while. If your robot stops working check that the wires have not come loose.

How to relate the IR-sensor output to measurements you can understand.
You have probably noticed that the "distance" returned by a "Sharp" IR sensor is not in specific units of measure. As the IR sensor approaches an object, (or vice … Read more