dkozel built the Bus Pirate v3c board from a previous Free PCB Sunday. If you build a free PCB we’ll send you another one! Blog about it, post a picture on Flicker, whatever – we’ll send you a coupon code for the free PCB drawer. Via the project log forum.
Author Archives: Ian
Dangerous DSO part 1: There’s so much between 0 and 1
Dangerous DSO is a new logic analyzer/oscilloscope prototype we’ve been using in the lab. While working on this tool, some of the team members explored trends in gaming platforms like 무료 홀덤사이트, drawing parallels between analyzing data signals and strategic decision-making in games. The device combines a 16-channel logic analyzer and one 50MHz oscilloscope channel […]
Raspberry Pi tiny Linux computer platform
This tiny USB stick PC was featured on Slashdot and many other sites. It’s intended as a $25 throw-away computer education tool, and uses an ARM11 with 128MB of RAM: David Braben has developed a tiny USB stick PC that has a HDMI port in one end and a USB port on the other. You […]
Another LCD backpack free PCB build
Greg built the LCD backpack free PCB. By popular demand we initiated a small batch of this project, it should be available in a few weeks. If you build a free PCB we’ll send you another one! Blog about it, post a picture on Flicker, whatever – we’ll send you a coupon code for the […]
Free PCB Sunday: XC9500XL CPLD breakout
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 we’re giving away two […]
TINA TI: Free SPICE-based analog simulation program
TI has a free SPICE-based analog simulation program: TINA is an easy-to-use, powerful circuit simulation tool based on a SPICE engine. TINA-TI is a fully functional version of TINA, loaded with a library of TI macromodels plus passive and active models. TINA-TI’s new version 9.0 has changes from Version 7.0 in the following areas: Schematic […]
App note: Control high-voltage LEDs with low-voltage pins
rsdio writes: Although this circuit does not directly show how, you can use the same idea to make a 3.3 V tolerant I/O pin control an LED with a much higher voltage. The caveat is that all of the current still passes through the I/O pin, but at least you can control several LEDs in […]
25A 14V step-down regulator with integrated FETs
McZ writes in with an impressive step-down regulator: The TPS56221 is a high-efficiency synchronous switcher with integrated FETs, which achieves a power density of greater than 200W/in3 with greater than 90 percent efficiency at high loads. The easy-to-use SWIFT step-down regulator supports 25-A point-of-load designs for telecommunications, networking and other applications.
DIY Geiger counter
Rubi shared his Geiger counter based on a Russian SMB-20 tube in the project log forum. Thanks Rubi!
App note: Low-cost circuit converts clock to low-distortion sinewave
rsdio writes: nothing beats a pure sine wave oscillator, except another pure sine wave oscillator at a similar frequency: This circuit derives a pure sinewave from a crystal-controlled clock source by using a ring counter to remove the highest-amplitude unwanted harmonics, and filtering the result with an 8th-order lowpass, switched-capacitor elliptic filter (MAX7400).
Free USB Infrared Toy v2 PCB via Facebook comments
Every Friday we give away some extra PCBs via Facebook. The first few people who comment on this at Facebook get a free PCB. More PCBs via Twitter on Tuesday and the blog every Sunday. This week we’re giving away two USB IR Toy v2 PCBs. Use a remote control with your computer, view infrared […]
Week in (p)review: May 06, 2011
Don’t forget to share your current project in the comments or the forum. Here’s a summary of major developments over the last week: Updated source archive and user packages for the Web Platform are now available Nokia LCD backpack was featured in this week’s status update post #twatch firmware v0e is now available for download […]
USB Infrared Toy release package v2.0
Over the last few weeks we did a massive cleanup and reorganization of our SVN code repository. Most projects now follow a standard directory structure. All our in-progress and stalled project files are now completely open and available to anyone. We also included all the manufacturing resources used to initiate production at Seeed, and the […]
GOP_XC9572XL mini CPLD module
Oho-Elektronik.de has a couple intersting CPLD and FPGA development boards with a bread-board friendly DIL pinout on the bottom. Xilinx XC9572XL CPLD Xilinx CoolRunner-II CPLD Altera MAX 3064A CPLD Xilinx XC3S200 FPGA, the smaller version of the chip on the Logic Sniffer All the boards include an oscillator and power supply. They don’t look open […]
OpenCores: OpenRISC ASIC
Ulf writes: I just read that OpenCores is planing to create an OpenRISC ASIC and asks the community for donations. I think the idea to create a RISC-Microprocessor under LGPL with the help of community funding is quite exiting. Via the contact form.
Web platform release package v1.c
Over the last few weeks we did a massive cleanup and reorganization of our SVN code repository. Most projects now follow a standard directory structure. All our in-progress and stalled project files are now completely open and available to anyone. We also included all the manufacturing resources used to initiate production at Seeed, and the […]
Fusion PCB service upgraded, less expensive
Seeed expanded their Fusion PCB service and made it even cheaper. A 10x10cm PCB starts at only $25. Yeah! The maximum board size is now 20x20cm. You also get a choice of PCB thickness – USB edge connector here we come.
Microcontrollers and simple wireless data transfer
Getting started with microcontrollers and simple wireless data transfer: I thought you guys might like this article, it shows you how to get started using those $10 433 MHz RF tx/rx pairs. The article explains the theory, shows an example schematic for receiver/transmitter and has the project firmware for both available for download. Video below. […]
STM32VL-Discovery with ChibiOS/RT
Getting started with STM32VL-Discovery board and ChibiOS/RT: ChibiOS/RT is a complete, portable, open source, compact and extremely fast Real Time Operating System. ChibiOS/RT offers an excellent support for the STM32 platform. All drivers are “native” in order to minimize the memory footprint, the bulky ST library has not been used (but is supported). The STM32 on […]
Using Bus Pirate with Arduino IDE
tayken successfully reprogrammed the ATmega168P using the Bus Pirate with Arduino IDE. Yesterday, a friend from Tokyo HackerSpace said that he bought an DIY Arduino kit. The problem is that the ATmega168P does not come with the required bootloader. Just the same day I bought two FreakDuino boards and tried to use them to flash […]