Tag Archives: Microcontroller

Recommended Microcontroller

Scientists create molecule-sized photochemical keypad lock

Here’s a new keypad that is size of a molecule that’s being worked on by the scientists. Great job guys, look forward to the next generation of mininture keypads!

via ministryoftech

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DIY HACK – The simpler USB2LCD using HD44780

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.

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DIY – Voice recognition system by students from Cornell

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 Mega32 microcontro

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DIY HACK – Make your own Oscilloscope

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

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 motor and miscel

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DIY HACK – Etch CNC

Check out this cool etch CNC.  Actually we were thinking of making this too, but since it’s already made, we can learn from it and make it quicker.  Awesome! 🙂

I am using a retrofit machine that fit within my budget. It’s a 2-axis machine with approximately 170x130mm travel.

The circuit board is my own design, using a ULN2803 per motor to supply approx. 0.3 amps per winding. The power supply is a standard AT hard-drive power connector, with the +12V used to power the

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DIY HACK – Wave Bubble portable RF Jammer

Ladyada has a cool RF Jammer that you can build yourself…WOW!

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DIY Tool – Epson unveils smallest GPS chip ever

Here’s the smallest GPS chip ever! Great news for us hackers and DIYers!

PhysOrg.com says “thanks to clever use of space-saving technology the S4E19863 series is the world’s smallest GPS module (7 mm x 6 mm x 1.28 mm), making it ideal for applications with limited component space, such as mobile phones. ”

Epson’s new GPS is already being massed produced and is already integrated into NTT DoCoMo’s F

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DIY Useful Info – AC Devices HOWTO and IR repeaters

Here’s a cool AC Devices HOWTO from the pages of Make! Very simple and very useful.

Also check out the IR repeater using McDonald toys on the same page. via

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Electromagnetic Pistol using PIC!

Wow, check this gun out that William submitted. Thanks William! Check out the photos and how it works.  Nice big ass capacitors, wow!

    Two coils are precisely pulsed in sequence (350 Amp peak) to fire a steel projectile Two infrared sensors detect the projectile position within the firing tube Controlled by a PIC microcontroller Powered by 8 AA NiCd battery pack Built-in battery charger Bar display tracks capacitor bank cha

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