Do-it-yourself projects and technology updates

Monday, February 20th, 2006

DIY Metal Detector

Here is a site with a DIY Metal Detector. This is a BFO, or beat frequency oscillator. This metal detector has a coil in the probe, and another in the control box. The two oscillate out of sync with each other, and you can hear a beep coming out of the speaker. When the larger [...]

Saturday, February 18th, 2006

LED Pong and Laser projector

These are two of the coolest things I have seen in a while. The first thing that you see up top is a pong game that is played on a 5×7 board of LEDs. This tiny game can play two players, and if the ball gets past your opponent, you get a point. It is [...]

Saturday, February 18th, 2006

Dance Messager

Dan from instructables.com made a POV (Persistance of Vision) toy that you attach to your shoes. He has a circuit board, and a row of LEDs that he controls with a microcontroller. As you walk the LEDs change to form a word in the air. You can see this project as well as others in [...]

Friday, February 17th, 2006

New Projects Section

I have teamed up with www.instructables.com to host my projects uploads. I have heard discussions from people that have done some projects. I really wanted to make an interactive part of my site so that my readers would have a place to host their projects. Phillp Torrone from www.makezine.com suggested to me that I partner [...]

Thursday, February 16th, 2006

Laser driver circuit

I was doing some research on laser drivers and I ran across this simple website that gives a schematic for a laser driver. The author took a small keychain laser and reversed engineered the driver circuit to figure out how it works. Basically the laser head has an emitter and a detector. A small amount [...]

Wednesday, February 15th, 2006

Communicate with laser via serial port

Matthew, from superpositioned.com, and I have been discussing in DIY Live Forums the possibility of of sending video signals over a laser. A laser is capable of transmitting terabits per second. Of course this is limited to gigabits because of the lack of response in sensing circuits. Regardless, we discussed that if you could multiplex [...]

Tuesday, February 14th, 2006

Feeds are messed up

Hey, the feeds are messed up. I am not sure what is wrong. If it is working for you, let me know what address you are subscribed to. I am sorry for any inconvenience. I am not sure what is wrong. Greg

Tuesday, February 14th, 2006

Learn php and mysql

Well, I have been updating my site a lot lately. I am finally learning how to program php better. There are a few oddities about it, but it is a very powerful tool for webdesign. I wanted to write a quick post about a good tutorial site that I go to to help with web-design. [...]

Monday, February 13th, 2006

Update to WordPress 2.0.1

Hey, I am going to be updating my site today. Hopefully it will go smoothly. If there is any downtime, it should not be long. Greg

Monday, February 13th, 2006

DIY DTMF Decoder

I have already talked about a DTMF decoder, and some of the many uses for one. I ran across a short article, that sparked my interest in these chips. What does DTMF mean? It means “dual tone multi frequency”. Who would have thought that a dial tone on a phone was actually two different frequencies [...]

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