scasagrande shared his GPIBUSB Adapter rev3 in the project log forum: This past weekend I finally finished up the third major revision of my GPIBUSB adapter board. Major hardware changes include swapping the pull-up resistors for the proper GPIB line drivers, as well as swapping the FT232RL for the newer FT230X. There is a number of software […]
Author Archives: DP
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: Universal serial bus power management
See this app note from Micrel on USB power requirements and distribution. Power management and distribution is a major factor in correctly designing USB (Universal Serial Bus) peripherals. Proper methods of designing USB peripheral power distribu- tion are crucial to ensure full compliance with the USB specification, including compliance with electromagnetic in- terference (EMI) and […]
App note: Design considerations for 5V to 3.3V pass regulators
Great app note from Micrel on thermal management for voltage regulators. This note discusses the LDO option, including choosing between simple three terminal regulators and full-featured five terminal regulators, and provides formulas, calculations, and a selection of commercial heat sinks for powering 3.3V logic circuitry requiring up to 5 amps from a standard +5V supply. […]
App note: Interfacing 3V and 5V applications
Another app note from NXP/Phillips Semiconductor on I/O voltage level shifting. Many reasons exist to introduce 3V systems, notably the lower power consumption for mobile applications and the introduction of parts that use technologies with such fine geometries that 5V is simply not allowed any more. The introduction of the 3V standard as supply voltage […]
An ARDUINO Yun security guard
Boris Landoni from Open Electronics writes: Let’s capitalize on the Yun Arduino new features to create an electronic “guard dog”, which allows you to watch your stuff, a hidden corner of the backyard or our car silently laying in the garden. Here we wanted to face a small project, but one you would not be […]
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 […]
Week in (p)review January 10, 2014
Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon. Making a Dangerous Prototypes sign in Shenzhen XC9572XL CPLD development board, Bus Blaster v4 and DP6037 Protoboard v1 PCB back in stock We had 1000 boxes and part holding trays made up for the new OOMP part management system Recovering e3000 […]
Arduino MIDI with the Bus Pirate
@indigoid tweeted, “Finally got the Arduino MIDI IN working. <3 my Bus Pirate, best $30 ever. Happy!” Get your own handy Bus Pirate for $30, including world-wide shipping. Also available from our friendly distributors.
A new open source 200MHz logic analyer
Here’s an interesting open source 200MHz logic analyzer project on Kickstarter, the DSLogic by DreamSourceLab: DSLogic consists of DSLogic-Core and extension modules. DSLogic-Core is a re-configurable circuit board based on FPGA technology with maximum 200MHz sampling rate and 64Mbit on-board memory. DSLogic-Core can work alone as a fully functional logic analyzer, along with various extension modules.DSLogic can also […]
chipKIT Project 3: Easy pulse meter
Raj over at Embedded Lab has just finished a new Pulse Meter project based on chipKIT Uno32 and Easy Pulse sensor: This is a third project in our chipKIT tutorial series and today we are going to construct a simple pulse rate meter using our Easy Pulse sensor with Digilent’s chipKIT Uno32 board. Digilent’s chipKIT Basic […]
Resistor reels just arrived
63 resistor reels just arrived for a test 0603 OOMP part book. Books and sheets should be here tomorrow. We’ll stuff some samples and get an idea of the time involved this weekend if everything goes smoothly.
XC9572XL CPLD development board back in stock
XC9572XL CPLD development board are back in stock at Seeed Studio. CPLDs are programmable logic gate arrays which allow you to build custom logic devices simply by programing them. Get the XC9572XL dev-board for $15 and CoolRunner-II development board for $15.
OpenMV Update: 25FPS face detection, USB support and more
mux posted an update on his camera project OpenMV, an open-source tiny machine vision module using an STM32F4 ARM Cortex-M4 micro and an OV9650 sensor: USB Support- The camera now supports USB OTG full speed, I’ve also written a small userspace tool with libusb/SDL to interface with the camera and view the frame buffer, this makes it […]
CNC Machine built using floppy drives
Richard Harris has produced a series of video tutorials on how to build a low cost micro CNC machine that uses old floppy drives for the movement. The video above is 10 in the series, if you would like to build you own you will need to start from video 1 which is here. It won’t do […]
OctoPROBER, The 8-Channel temperature logger
Parker Dillmann of Longhorn Engineer is working on a 8 channel K-type thermocouple temperature logger, the OctoPROBER: This has been an idea I have been kicking around for awhile. The OctoPROBER is a 8 channel, K-type thermocouple temperature logger. It has a micro SD card slot for logging data remotely. The USB connection can send log data […]
JTAG adapter for Arduino Micro
Baoshi writes: For the holiday season I get myself an AVR JTAGICE3. Holding the new shiny emulator and a bunch of Arduino boards, what shall I do? Of course to hop onto the all-hail Atmel Studio and ditch the toy-alike Arduino software. Reason being? Debugging Arduino code with serial console is no fun. I need […]
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.
#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 […]
A DIY driver for EQ2 equatorial mount motor
Miceuz blogged about his DIY driver for EQ2 equatorial mount motor: We wanted to give a telescope as a Christmas present to one kid. Luckily enough we have happened to find one standing under the autumn rain in a second hand junk yard in Berlin. The telescope itself was dusty and wet, but the mount was […]