I have been thinking about hacking my boring door bell for years. I want want mine to knock on the door when the door bell is pressed. The guys over at PopSci have come up with a cool way to make what they call a Ding Tone Door Bell, have a look it looks like fun. 🙂 “If you’ve got a spare MP3 player laying around your home, it’s time
George from AmateurLogic.TV puts together a surface mount software defined radio kit in this episode. “George builds the Softrock Software Defined Radio. Jim introduces us to the International Beacon Project. Tommy demonstrates and explains all about the amazing Ham Radio Deluxe. Peter is back with a mountain top review of the Degen DE-1103 shortwave receiver.”
Jordan Crittenden and Edwin Lai built this DIY Polygraph, their goal was to construct it for $50.00. “The basic design of the polygraph is shown in the diagram to the right. The four analog circuits: plethysmograph (pulse rate meter), GSR meter, breathing rate meter, and audio preamplifier, are attached to the first four pins of the Mega32 analog to digital converter (ADC). The polygraph can then be run in one
Tobias Hocke has built a cool binary clock that is based around the ATmega8515 microcontroller. Slap in a 9 volt battery and push a few buttons to set the time and you have a clock that very few people can read. Check out his site for a full schematic so you can build your own.
Fire Wire is a way to put on a simple but cool fire display. All you need to do is tie some steel wool to the end of some wire using a slip knot. Then using a lighter light the steel wool. Spinning the burning steel wool produces an impressive (and possibly dangerous) shower of burning metal particles.
Congratulation to the last contest winner. Up again is a compact flashlight for all of your hacking needs. 🙂 This contest will run for this weekend only (November 17- 18, 2007) . Ending time is based on central standard time. To enter, identify the item pictured above and give an example of what can be done with it. Please do not give the answer in the comments. Send an
Sean over at LED MOD has some cool LED car mod products. I would be interested to know how the RPM changing kits sense the RPM. Is there a line that goes to the spark plug or is there some sort of data connection to the car computer? However it works the results are great!
