More development on the Bus Pirate Edu Kit documentation. The image above demonstrates the need for a breadboard wiring diagram, where each connection corresponds to the coordinate on the breadboard.
Author Archives: DP
GSM/GPRS micro development board
Elpis shared his GSM/GPRS micro dev board in the project log forum: It is a 70×43.7mm control board (the PCB is made from SeeedStudio) designed as a part of a bigger project. But since the beginning I was trying to make it as a general-purpose development board for the Telit GL865 GSM/GPRS module. At this version (v1.0) […]
New version of MAX7219 based 4-digit serial seven segment LED display
Embedded Lab’s new version of MAX7219 based 4-digit serial seven segment LED display: This (SPI7SEGDISP4.40-1R) is a revised version of the previous SPI seven segment LED display (4 digit) board that displayed numerals and decimal points. The new version has a better quality seven segment LED display (LTC-4727JS) with three extra LED segments, as shown […]
Replacement code lock for LS7220 base systems
Dilshan Jayakody presents an alternative design for LS7220 base code locking systems: LS7220 is a “hard-wired” code-locking system, but this simulated system provides both “hard-wired” and customizable (re-programmable) code locking options. This re-programmable feature provides some higher degree of protection to the system and it allows user/administrator to change system’s code at any given time […]
#FreePCB via Twitter to 2 random RTs
Every Tuesday we give away two coupons for the free PCB drawer via Twitter. This post was announced on Twitter, and in 24 hours we’ll send coupon codes to two random retweeters. Don’t forget there’s free PCBs three times a every week: Hate Twitter and Facebook? Free PCB Sunday is the classic PCB giveaway. Catch […]
DP6037 Protoboard v1 PCB back in stock
The DP6037 Protoboard v1 PCB is back in stock at Seeed Studio. A multipurpose 0.1″ pitch prototyping board that fits a DP6037 acrylic case. Grab a PCB from Seeed for $2.50.
Workshop Update for February 25th, 2013
Today we mostly worked on the documentation for the upcoming Bus Pirate Edu Kit. We tidied up the 3D models, and started writing up the individual exercises. High resolution version (1280px) of the image above is available in our SVN.
RickPAW RGB encoder with an LED ring
Rwinscot posted about his RickPAW RGB encoder w/ LED ring project. It’s a encoder breakout board, with a ring of LEDs designed to display the current position of the encoder. The LED’s and encoder are controlled via a microcontroller which can be interfaced with, through a serial port. Going to try a mix-and-twist on the […]
TOS-100 Arduino stepper driver shield tutorial
Here’s a tutorial on the TOS-100 Arduino stepper driver shield. The TOS-100 is an Arduino compatible Shield capable of driving one stepper motor up to to 1.7A that utilizes the Trinamic Motion Control TMC260 motor driver chip. For added compatibility with other arduino shields, the TOS-100 allows you to choose nearly any pin for any […]
SpiroGraph 3D laser project with Arduino
Here’s an SpiroGraph 3D laser projector controlled via an Arduino: Reflect a laser beam off mirrors mounted on three fans to display a ‘wild’ 3D spirograph type pattern on any surface. Provide fan speed control (manual or automatic) to adjust the displayed patterns. Full electrical schematic and source code follows. Via Hacked Gadgets.
Quadcopter in a 5x5cm PCB
Erdabyz has been working on a quadcopter to fit in a 5x5cm PCB: This is something I’ve been working on these days. The other day I was thinking about what would be the coolest possible thing you could fit in a 50x50mm 2 sides PCB. How about a quadcopter? Via the forum.
0.5mm pitch xQFP breakout boards back in stock
0.5mm pitch xQFP breakout boards are back in stock at Seeed Studio. These boards make your QFP prototyping faster and easier. They’re available in 0.50mm, 0.65mm, and 0.80mm pin pitch for just $3.
Texas Instruments: Antenna selection quick guide
Here’s an antenna selection guide from Texas Instruments. What we find interesting are the various comparisons of 2.4 GHz wireless antennas and the linked documents which describe how to design them.
Free PCB Sunday: Pick your PCB
We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few PCBs from one of our past or future projects, or a related prototype. Our PCBs are made through Seeed Studio’s Fusion board service. This week two random commenters will […]
App note: Joystick game controller reference design
Atmel AT01095: Joystick game controller reference design This document (PDF!) shows the implementation of a joystick game controller based on the Atmel ATxmega32A4U microcontroller. This design allows users to control the mouse cursor and simulate left/right clicks from a personal computer (PC) or laptop via push buttons on the joystick of a game controller.
Noise of a Non-inverting Operational Amplifier Circuit
This video discusses the total noise of a non-inverting Operational Amplifier (Op Amp) circuit by Analog Devices’ Matt Duff.
App note: Bit Banging I2C on mid-range MCUs with the XC8 C compiler
Bit Banging I2C on mid-range MCUs with the XC8 C compiler: This application note is intended to serve as a reference for communicating with Microchip’s 24XXXX series Serial EEPROM devices without relying on a hardware serial port to handle the I2C operations.
Workshop Update for February 22nd, 2013
We designed Bus Pirate Edu kit label mock-up and tested the latest placement export ULP for the pick and place. Arachnid Lab’s group buy of the Stencil8 solder paste stencil system has arrived. The Bus Pirate Edu kit 3d models are done, and 3 exercises are ready for rendering.
Tiny RGB stick string lighting
Pfriedel posted his RGB stick blinking lights in the project log forum: So to keep my iron hot and to give me something to keep practicing working with SMD devices, I’m about to order a run of about 30 tiny little 14x50mm stick blinkenlights. I figure as I finish them they’ll end up hanging over […]
Free PCB coupon via Facebook to 2 random commenters
Every Friday we give away some extra PCBs via Facebook. This post was announced on Facebook, and on Monday we’ll send coupon codes to two random commenters. More PCBs via Twitter on Tuesday and the blog every Sunday. Don’t forget there’s free PCBs three times every week: Free PCB Sunday. The classic. Every week, get […]