Let's Make Robots!

Basic 74AC240 Bicore

reacts to light

Here he is, after three hours of soldering. His brain is the exact one from the "Junkbots, Bugbots, and Bots on Wheels" book. He's still a work in progress, and I still want to add some indicator LEDs and some solar cells so he can charge a battery. Also, I'm really new to this stuff, and I would appreciate any tips and/or constructive criticism and/or ideas.  His body was from a kit called a brush bot that I modded a little with a dremel tool.

A good view of his brain:

A view of his bicore brain

An even better view of his brain:

A really zoomed in view of his brain

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

- 74AC240 Buffer

- 2 980 nm Infra Red Light Photodiodes

- 2 "103" ceramic capacitors

-1 vibration motor

-19v battery clip

-1 DPDT switch

Not everyone has the "Junkbots, Bugbots, and Bots on Wheels" book, maybe tell us what it does.

I also am interested where you got a 19v battery clip. Must be some new chinese battery technology lol just kidding

Love the eyes. Would love to see a video, too, of course :)

He has a vibration motor for locomotion.  He is meant to run after light, but since I don't have a nine volt battery, I haven't really gotten him up and running on anything except the breadboard.

cool bot, btw, what does it do? you should edit it with a lot of information, and that googly eyes, such a nice addition :D


the thing about the googly eyes is this: he was originally something called a brush bot.  it's a kit that lets you make an extremely simple robot that, at its heart, is a motor, switch and batteries.  he vibrates on a brush, and as the bristles vibrate with the motor, he moves.  He had googly eyes that came with him.  Anyway, he was on my bench and I was looking for a motor for the bicore I was making.  So some hot glue and solder later, and here he is now.

Answering your first question, he follows light.

P.S. have you ever seen those "hex bugs?" he moves really similarly to the smallest ones that come in the plastic tubes @ RadioShack, Wal-Mart, etc.

aye, the hexbug micro, i know what kind of robot that is, it's a vibrobot or bristlebot, cool!

I don't get it. How do you make a single motor bristlebot follow light?

Well, my hope isn't that he will necessarily follow the light, but that he will at least react to it.  I don't know what he's going to do because I didn't breadboard him with this specific vibration motor.  I think it is a law of the universe in that nothing ever works right the first time.

Ah, OK. So it will react to the light and move, but not follow. That makes more sense!