MobileWill built this LED Matrix link project for his wedding: i just wanted to share my latest project for my wedding but i have also listed on tindie. I made a easy way to use the led matrix with the max7219. They are daisy chainable and i will be making a microcontroller add on as well. […]
Author Archives: DP
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 March 29, 2013
Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon. ATX Breakout Board V1.1 Acrylic case back in stock Cortex M3/M0 breakout board free PCB build Fixing a PM5132 function generator with the Part Ninja Workshop Update for March 27th, 2013 Workshop Update for March 26th, 2013 Workshop Update […]
Superprobe meets vintage multimeter
Mountaindude writes: “Built myself a Super Probe, in part based on DP’s design, parts from the original design. Nice little project, all in all”: It’s really just a Superprobe in a somewhat unique (probably not, but I like the concept..) case. The Superprobe exists in various flavours, the ones I’ve liked best so far are […]
Digital counter with internal PIC EEPROM memory
Electropepper documented his small SMD digital counter build: This is a simple digital counter with a serial rs-232 and a 7 segment display, i started this project to count items on some shelfs, but it can be used for anything, it is also, for the exception of the connectors, completely on SMD components. The circuit is […]
TaoBao shopping service Bhiner review
In relation to the previously posted Sourcing cheap parts on TaoBao, China’s eBay, Sleemanj did a review of the TaoBao shopping service Bhiner: It’s a real shame that those shipping fees are SO much higher than some other agents, because otherwise I was impressed with Bhiner’s efficiency and speed (paypal delay accepted), with their website (even with […]
APRS and GPS networking, operations and theory by Steve Bowen
Todd Harrison, member of the Superstition Amateur Radio Club (SARC), posted this video by Steve Bowen: APRS and GPS networking, operations and theory This presentation does not cover how to setup and use Automatic Packet Reporting System (APRS) but does get into its origins, limits, functionality and usage.
Lira, an Arduino-compatible microcontroller
Lira is an open source Arduino-compatible microcontroller designed by Lyratron: What I came up with is the Lira. It is, as you will see, little more than a breakout board for the ATmega328, but it provides all the bare necessities like voltage regulation, basic power conditioning and an FTDI programming interface. It’s the smallest, simplest, cheapest design […]
Workshop Update for March 27th, 2013
Today we sourced parts for a few upcoming dangerous prototypes part kits. We also visited tailors in Louhu to talk about DP t-shirts and other fashion. In the workshop we worked on documentation, and some Eagle library ULPs.
1Hz to 10MHz frequency meter using ATtiny2313
1Hz to 10MHz frequency meter using ATtiny2313: This AVR-based Frequency Meter is capable of measuring frequencies from 1Hz to 10MHz with 1 Hz resolution. The hardware of this project consists of seven 7-segment displays, AVR ATtiny2313 uController, and a few transistors and resistors. The AVR counts input pulses for a precise 1 second interval (generated […]
TL-WR703N: Webcam streaming
Madox wrote a short tutorial on how to set up a streaming webcam: Connecting a webcam and using the router to stream video around the place should be one of the easiest things to do. A bit too easy in that I neglected to provide simple instructions on how to set it up. mjpg-streamer and […]
Minecraft cube
Ryandiver shared his minecraft cube project in the forum: After my flowers went down a treat on Valentines Day I decided that I needed another project. A friends birthday is in April, so I figured that would be enough time to build something. While reading my usual news stuff I came across this and thought it […]
Workshop Update for March 26th, 2013
Started adding content to Bus Pirate kit layout. Picked up computer and tools for the new remote office in Huaqiangbei. 3 hours of grueling Chinese lessons, thanks Yeeong! Made a run from Shenzhen to Hong Kong for some computer stuff like SD cards and flash disks.
Dot Matrix wall writer – Time writer
Dot Matrix wall writer – Time writer: Olivier van Herpt invented a machine called the Time Writer. It allows any graffiti artist in training to get their message out to the masses with the push of a button. An Arduino controls the action here. The Arduino pulses a number of relays which open and close […]
How ferrite beads can filter out EMI [Electronics]
Giorgos over at PCBheaven posted this video by Alan Wolke aka W2AEW about the basics of ferrite beads, and their uses for basic filtering applications: Here is an excellent tutorial on how ferrite beads can attenuate high frequency interference into data or power lines, such as EMI. I encourage you to watch this video!
#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 […]
Making MIDI hi-hat controller from unused bass drum pedal
Hwmayer documented his DIY MIDI hi-hat controller from unused bass drum pedal: Recently one of my friends bought an electronic drum set made by polish manufacturer “DIG DRUM”. The drum set is very good and combined with the Alesis triggerIO works really well. Unfortunately the pedal for controlling the hi-hat open/close signal was not included […]
Workshop Update for March 25th, 2013
Visited with Seeed about Bus Pirate edu kit, parts kit, and a handful of other projects. We continue working on the Bus Pirate edu kit documentation.
Cortex M3/M0 breakout board free PCB build
Twinpeaks built a Cortex M3/M0 breakout board free PCB. I just finished my free Cortex M3 Breakout Board using an NXP LPC1343. Running at up to 72 MHz this has quite some power for such a tiny uC. I think I’ll hook up some glue logic and convert it to a CoLinkEx Jtag-Debugger to be […]
Tips & tricks to sort and rework surface mount devices (SMD)
Tips & tricks to sort and rework surface mount devices (SMD): I’m a member of the Superstition Amateur Radio Club (SARC) and each month we have a presentation on a ham radio related subject. I volunteered to record and upload the club’s monthly presentations. There were two presentations at the March 2013 club meeting: Tips […]