Tag Archives: Circuits

Recommended Circuits

HOWTO make a 9V battery into six 1.5V AAA batteries

Posted on December 31, 2006 by max

video://www.metacafe.com/watch/360955/9_volt_battery_hack_youll_be_suprised/

This is cool since i didn’t expect to find 6 1.5V AAA batteries in one 9V battery.

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HACK – PIC USB Programming, a Hackaday Competition Entry

Posted on December 31, 2006 by max

http://zedomax.com/image/200612/usbusb.jpg

Here’s a cool PIC USB programmable microcontroller. Cool…a hackaday competition entry…

“This design uses the Microchip PIC 18F2450 or 18F2550 USB enabled microcontroller. The total parts cost is around $15 including the microcontroller for a single board. The board features a USB port that can be used with a bootloader for easy programming. It is designed to use a 20MHz crystal. Two switches are included, for MCL

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DIY – Simple LED HOWTO

Posted on December 30, 2006 by max

http://zedomax.com/image/200612/led-howto.jpg

Here’s a simple LED HOWTO using LEDs and some batteries for those of you interested in LEDs and want a class-101 on it.

via

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DIY HACK – The simpler USB2LCD using HD44780

Posted on December 29, 2006 by max

http://zedomax.com/image/200612/lcd-hack.jpg

Here’s a cool little USB to LCD hack!

The hardware of the LCD2USB interface consists of the Atmel AVR Mega8 CPU, a cheap and easy to obtain microcontroller with 8 KBytes flash (of which ~3k are used in this application) and 2 KBytes RAM. The processor is surrounded by few parts, mainly connectors to interface to the PC and the LCD.

via

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DIY HACK – Party Ball or Disco Ball

Posted on December 29, 2006 by max

http://zedomax.com/image/200612/party-ball.jpg

Even though this is a DIY without a smart embedded computer chip, we give props for head start on our future DIY. It’s very rugged and has some “too much glue gun”, but we do give it 3 thumbs up for the idea, not for the design. :0)

“Here is my version of the LED Disco Ball. Its Completely portable can either be hung or screwed to the roof. It runs on 3AA batteries and has a group of gears f

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DIY – Voice recognition system by students from Cornell

Posted on December 28, 2006 by max

http://zedomax.com/image/200612/voice-recognition.jpg

Here’s a cool DIY voice recognition system by computer engineering students at Cornell University. Nice job, keep up the good work!

When we think of programmable speech recognition, we think of calling FedEx customer service call center with automated voice recognition response systems. We also think of PC-based speech recognition Dragon NaturallySpeaking. Now we took that a step further. We are talking about speech recognition in a tiny M

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DIY HACK – Make your own Oscilloscope

Posted on December 28, 2006 by max

http://zedomax.com/image/200612/diy-oscilloscope.jpg

Check out this DIY Oscilloscope using Atmel Atmega32.

I wanted to see if I could make a useful scope using just a microcontroller and a television. The result works, but is a bit slow with a maximum sampling rate of 15,750 Hz. This is fast enough for most electrophysiology, but not for audio. The sampling rate is determined by the maximum rate of the internal A/D converter.

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DIY HACK – “Propeller Clock” Mechanically Scanned LED Clock

Posted on December 28, 2006 by max

http://zedomax.com/image/200612/cool-pov.jpg

Cool propeller clock you can make!

How this clock works: A motor spins the “propeller”, and a small microprocessor keeps track of time and changes the pattern on seven LEDs with exact timing to simulate a 7 by 30 array of LEDs. It is an illusion, but it works nicely.

If you want to build this clock, you will need a few things, including: Skill with motors and mechanical things. Prior electronic experience. A dead VCR or floppy drive or other source of a suitable

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