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21 Feb 2011

Check out all these amazing OSHW Logos! Over 31+ entered so far, in the next couple weeks we’ll have a logo for the 1.0 definition! [via]

Open Source Hardware Logos! - [Link]

21 Feb 2011

Tim writes – [via]

This is a free (open source) Python script for creating feeder sprockets for e.g. perforated tape or film advance. I wrote it for myself to generate SMD tape-and-reel feed sprockets, but it might also be useful for making replacement sprockets for 8/16/35mm film, microfilm and paper-tape systems whose original reader hardware no longer exists or is difficult to find replacement parts for. The output is a .DXF template suitable for laser cutting, 3D printing or CNC machining. “Documentation” below, but it should be pretty self-explanatory. It should work with any modern version of Python (tested on 2.6).

Tape Sprocket Creator - [Link]

21 Feb 2011

DIY SMT pick and place prototype. [via]

DIY SMT pick and place prototype – [Link]

21 Feb 2011

Hacking the Rigol DS1052E Oscilloscope with Linux, hardwarehank writes – [via]

I was in the market for an oscilloscope, but I didn’t want to spend much. I found out about Rigol and their line of $300-400 scopes, and was getting ready to buy one. Then I found a post on how to make your DS1052E, which costs about $400 into a DS1102E, which costs about $700 with a simple firmware modification! I bought the scope right after, and I received it in the mail today. It’s pretty nice by default, but doubling the bandwidth is always a plus.

The DS1052E has a 50Mhz maximum frequency, but it has exactly the same hardware (as far as the reverse-engineering folks can tell) as the DS1102E, which has a 100Mhz maximum. This guide will show you how to make the switch very easily using Linux. You can do it in Windows too, but it’s a bit more involved, and Linux makes it really really easy.

Hacking the Rigol DS1052E Oscilloscope with Linux - [Link]

21 Feb 2011

While many think of Arduino as strictly for hobbyists, its ease of use makes it a great tool for prototyping products for the mass market. The designers of the Fitbit, a device for tracking your level of activity throughout the day, wrote to the Arduino team to tell them that they’ve been doing just that: [via]

We had a nice note from Shelten Yuen to say “We’ve been using Arduino for rapid prototyping for a few years now. It’s been a great tool for us in trying things out quickly.” It’s always nice to hear how people use Arduino at work as well as in their hobbies.

Fitbit Uses Arduino for Rapid Prototyping - [Link]

21 Feb 2011

weekendhobbyist.blogspot.com writes:

I mounted the switched on the back of my PCB. You can see them sticking out of the left side of the visor below. The top switch changes the speed that the pattern is run with, and the bottom switch changes to a new pattern.

LED Visor Build – MSP430F2013 based – [Link]

21 Feb 2011

A matrix keypad uses rows and column arrangement of keys to reduce the required number of I/O pins for interfacing with a microcontroller. This article shows how you can use a 555 Timer IC to interface a keypad with just 2 connections. The 555 timer is configured in astable multivibrator where the output frequency changes with each key press. Based on how many times the Timer module overflows, the information about the pressed key is determined.

2-Wire Keypad Interface with a 555 Timer – [Link]

19 Feb 2011

Fileark writes:

Here I show how to create some usable electricity from a candle and a peltier cooler.

DIY Peltier Candle Powered Electric Generator - [Link]

19 Feb 2011

An LED or Light Emitting Diode is a low power semiconductor light source used in lots of electronic devices. LEDs are closeley related to transistors and regular diodes.

What is a LED – [Link]

19 Feb 2011

In previous part of USART tutorial we have discussed about simplest way of implementing USART transmitting and receiving routines. These are OK to use but in more intense and power critical applications they are not practical and efficient.

Programming AVR USART with AVR-GCC. Part 2 – [Link]





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