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 […]
Author Archives: Ian
Openrobots intertial measurement unit dev-board
tinito has been working on an open source Intertial Measurement Unit to help with robot telemetry. Eagle files are published at github: The IMU is supposed to be high-end, implementing state-of-the-art data filtering, best low-cost MEMS sensors available and many features to compete with commercial IMUs used in robotics at a fraction of the price… […]
Gravitech microSD board in custom case
jbeale made a custom case for Gravitech’s microSD boards: That is a real, custom SLA (stereo-lithography) case that was fabricated for a prototype at work- they had the budget for it. It is like the 3D printed things made by a “reprap” type printer, except with finer resolution (I think the layers are each only […]
ENC424J600 breakout free PCB build
pietja built a free ENC424J600 breakout board. 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.
GLCD clock with large graphical LCD
ezflyr posted his GLCD clock with large graphical LCD in the project log forum: I’ve made quite a bit of progress on my GLCD clock project in the last week or so. I’ve now got the time keeping routines, and the GPS ‘sync’ routines working flawlessly. When connected to a GPS receiver, the clock will […]
Latest flashrom binaries for the Bus Pirate
New version of flashrom available. This app can program flash and bios chips using the Bus Pirate: Latest flashrom binary for Windows (32bit) This version also has support for plain ft2232-based flashers and thus it needs libusb and libftdi on your Windows machine. Via the forum. Get your own handy Bus Pirate for $30, including […]
A beginner’s guide to the MOSFET
An introduction to the MOSFET: If you need to switch high current and or high voltage loads with a micro controller you’ll need to use some type of transistor. I’m going to be covering how to use a MOSFET since it’s a better option for high power loads. This guide will be just a brief […]
Testing PCB sales: Bus Pirate v3.5a-SOIC on sale now!
A DIY version of Bus Pirate 3.5-SOIC is now on sale in the free PCB drawer. This is our first attempt at selling something directly. The PCBs were made through Seeed Studio’s Fusion PCB service. They’re red and 100% e-tested for errors. Unfortunately, this PCB has a minor bug, but it is easily corrected with […]
Yet another Bus Pirate GUI
Yet another GUI for the Bus Pirate: Here is a little gui I’m writing for my Bus Pirate and as an exercise in Qt. It is far from finish but I thought some of you might find it useful. At the moment, It’s nothing more than a modified console with support for the firmware upgrade […]
PIClock4 inter-microcontroller mutex
PIClock4: an inter mcu/avr hardware mutex. Up to 4 cores, build with 74xxx. This article is about building an inter MCU/PIC/microcontroller mutex/lock, allowing to have several disctinct cores (of any kind) working together and using a single resource without conflict. Via the contact form.
7400 competition entry: PCPU, homebrew minicomputer
Here’s an entry in the Open 7400 Logic competition: Homebrew minicomputer
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 […]
Debounced breadboard keypad
phirephly posted a debounced breadboard keypad in the project log forum: I’ve been getting tired of having to wire up buttons and paste in debounce code (or wire up debouncers for TTL projects) every time I want any kind of user input. I was browsing around Maxim’s site, when I stumbled upon the MAX6816-6818 series […]
Dual, unipolar/bipolar, high-voltage digital pulsers
rsdio writes: Hmm, maybe this would work as an EL Wire (electroluminescent wire) driver:MAX14811 Highly Integrated, Dual Digital Pulser.
Low-power digital ambient light sensor with I2C interface
An app note on a low-power digital ambient light sensor with an I2C interface: Optimized for black glass operations Consumes less power with ultra-low 1µA operating current Eliminates the need for different supply rails which saves cost and board area by using 1.7V to 3.6V VCC operation Delivers 0.025 lux to 104,444 lux sense range […]
Bus Pirate Arduino Shield free PCB build
apoco76 built a free Bus Pirate Arduino Shield PCB. 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. Get your own handy Bus Pirate for $30, including world-wide shipping. Also available from […]
Hackerspace passports at BarCampMilwaukee
From the comments on our Dangerous Prototypes hackerspace passport stamp post: I’ve got a stamp ready for BarCampMilwaukee6 which is happening in a few weeks I just hope someone (besides me) brings their passport. ;)
Precision analog microcontroller, 12-bit analog I/O, ARM7TDMI MCU
dps writes: Check out the ADuC702x series from Analog Devices. I’ve used them before, and they work well (but note the errata when you start using the A/D, as there is a “gotcha” in starting the conversion). They’re based on the ARM7TDMI processor and have several sleep modes for decreased power consumption. Via the forum.
Small AVR matrix toy
Greeeg posted his small AVR matrix toy in the project log forum.
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 a every week: Free PCB Sunday. The classic. Every week, […]