Nick Carter blogged about his DIY bench power supply with the ATX breakout board: There are tons of such projects out there on the internet but most involve hacking open the power supply and I didn’t think that was the way to go. I considered getting a cheap ATX adapter from Monoprice and breaking out […]
Author Archives: DP
Debugging the WM8731 ADC/DAC with the Bus Pirate
Pasdesignal tweeted, “I solved i2s/i2c issues on my raspberry pi with the help of Bus Pirate”: I have been experimenting with the WM8731 ADC/DAC chip (datasheet) and the raspberry pi using i2s and the aSOC drivers. I chose this CODEC because it already had an aSOC driver written, and Koalo had already written the other […]
DIY Bus Blaster case
Ado designed this case for the Bus Blaster version 2.5. Bus Blaster is an experimental, high-speed JTAG debugger for ARM processors, FPGAs, CPLDs, flash, and more: I made this case for the Bus Blaster version 2.5. It’s a JTAG debugger from Dangerous Prototypes. The license for the case is CC0 and the ViaCad file (ViaCad Pro […]
74HC4067 16-Channel analog multiplexer demultiplexer
Here’s another tutorial by John Boxall of Tronixstuff: 74HC4067 16-channel analog multiplexer demultiplexer Now and again there’s a need to expand the I/O capabilities of your chosen micorocontroller, and instead of upgrading you can often use external parts to help solve the problem. One example of this is the 74HC4067 16-channel analog multiplexer demultiplexer. That’s a […]
Making wine in Shenzhen: Double row IDC cable kit
Often it’s not clear exactly what connector, button, switch, or part is the best choice for a project. We end up making a last minute order of 1 or 2 of any likely candidate from Mouser or Digikey. That sets the project off by about a week while we dig through datasheets and websites, make […]
#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 […]
Mini 7-segment clock project update
Kevin Rye posted an update on his Mini 7-segment clock we covered previously: UPDATE: I finally got in my rev 1.1 PCBs from OSH Park. While working on these revisions, I came across some discussions about 슈퍼벳 and its innovative approach to user experience, which inspired me to rethink how I designed the interface for this […]
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.
Breadboard version Bus Pirate and ST7920
BrianGriffin posted his Breadboard version Bus Pirate and ST7920 in the project log forum: Over this weekend I cobbled up a breadboard version of Bus Pirate with the extra stuff I have from the drawer (the main chip PIC24FJ64GA002 is there too), dumped the bootloader and dumped the rest of the firmware with a dirt […]
Giveaway: Three prebuilt LEDger Led (polarity) tester
Mats has amazed us with his board a week projects, and now one of them could be yours! Today Mats is giving away three prebuilt LEDger. It’s a simple but useful LED tester: He’ll give these away to 3 random commenters, just leave a comment on this post. For more information visit the project’s Tindie […]
PCB a Week 20: LEDger Led (polarity) tester
Mats continues his challenge of designing one PCB every week. In week 20 he came up with LEDger Led (polarity) tester: Everytime I solder a SMD LED on a pcb I have to turn on one of my multimeters and flip it over to diode-test mode and then probe the SMD LED to see which […]
Simple 3D gerber viewer
Jérôme Vuarand developed an application to visualize Gerber data, a simple 3D viewer for Gerber files. This tool helps to review Gerber files before sending them to a PCB fab house: Over the course of the last 5 months I developped an application to visualize Gerber data. The goal was primarily to review Gerber files before […]
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: Button debouncing with configurable logic cells
Here’s an application note from Microchip describing how to make a button debouncer with the peripheral. In this application note, a PIC10F322 is being used to implement a delay block/debouncer. The delay can be set between 2us and 193us. This can be used effectively as a noise discriminator, or for switch debouncing.
Controlling a heat pump with Raspberry Pi and USB IR Toy
Here’s a video from Chris LeBlanc showing how to control a heat pump using a Raspberry Pi and USB Infrared Toy: A quick demo showing how to control a heat pump (or any IR device) using a Raspberry Pi, an IR Toy* from Dangerous Prototypes, a Google Calendar, and a bit of Python code. I’ve […]
Atmega328p PPM Encoder programming with the Bus Pirate
The Ardupilot guys have posted this brief tutorial on how to program the ATMega328p using the Bus Pirate and AVRDUDE software: Connect the Bus Pirate and check that everything is working. You will need to use the same technique to locate the serial port name for the Bus Pirate that you use with Arduino. Note […]
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 August 02, 2013
Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon. Making wine in Shenzhen: Keyed connectors kit Shaizi (liars’ dice), street BBQ, and beer: guanxi the easy way Filming for “On The E-Waste Trail” documentary Bus Pirate 3D-printed case DIY adapter for flashing ATtiny84/85 with the Bus Pirate Debugging […]
BlueFlyVario with the Sick of Beige DP5031 case
Alistair Dickie shows off his BlueFlyVario in a Sick of Beige DP5031 translucent blue custom case: The BlueFlyVario is a flight instrument for measuring vertical speed and altitude based on atmospheric pressure. It consists of a simple hardware device that measures the atmospheric pressure 50 times every second, with a resolution that enables the measurement […]
Making wine in Shenzhen: Keyed connectors kit
Often it’s not clear exactly what connector, button, switch, or part is the best choice for a project. We end up making a last minute order of 1 or 2 of any likely candidate from Mouser or Digikey. That sets the project off by about a week while we dig through datasheets and websites, make […]