Here’s an getting started guide from Maxim describing their MAXQ622 low-power RISC microcontroller: This application note describes how to create, build, and debug applications targeted for the MAXQ622 low-power RISC microcontroller. The article uses the IAR Embedded Workbench toolset and C compiler available from IAR Systems.
Author Archives: DP
Flashing a Nixie with an Arduino
Kevin Rye writes: I’m in the very early stages of prototyping a nixie clock. I picked up some MJE340 power transistors to switch on some IN-3s. I can then use a digital pin on my Arduino to turn on the IN-3s through the transistor. I’ll then have myself a blinking colon for my nixie tube […]
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 October 03, 2014
Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon. The Logic Sniffer is back in stock at Seeed Studio I2C injection with the Bus Pirate Bus Pirate v3.8 free PCB build Check out Elpis’ sensor modules in the project log forum Coming up: Free PCBs via Facebook on […]
Brewmonitor: The Arduino-powered, cloud-based homebrewing controller
The Arduino and Cloud-based homebrewing controller by Martin Kennedy of TheBedroomLaboratory: It’s just a basic site, based on this Scotch.io tutorial, which is currently plotting the temperature in my sitting room. It’s got a PHP backend (Laravel framework with RESTful API), MySQL database and an AngularJS frontend with (n3-chart/d3 for the graph). In the house, I’ve whacked […]
Remaking MSR206 RS232 magnetic card reader to USB
An article on modifying MSR-206 magnetic card reader to replace RS232 port with USB by crimier: This was of high urgency, so I’ve had to suspend my usual work activities and concentrate on this project yesterday. MSR-206 is a pretty impressive piece of technology, incomparable to those cheap eBay magnetic card readers. It even includes 24V […]
LC Meter based on PIC 16F628A
LC Meter based on PIC 16F628A build by EkusheBangla: Well this is a Very Accurate LC Meter based on PIC 16F628A .Having inspired from surprisingly accurate LC Meter. This is my attempt to build an accurate L/C meter.
Roland SP-404 AVR custom midi control pedal
An open source midi controller user for the Roland SP-404 sampler by Davide Gironi: The Roland SP-404 is a digital sampler made by Roland Corporation. This sampler has an input midi port, and expose a set of midi commands to control the unit. With this project user can control Roland SP-404 using a Midi Pedal. With […]
Blinky board arrived from DirtyPCBs
@ibuildrockets tweeted picture of his Blinky board from DirtyPCB: Ooh! Just had my order of PCBs arrive from @DirtyBoardsPCBs So red and purdy!
2014 Open Hardware Summit Rome, Italy
Tinito writes, ” I’m attending the Open Hardware Summit 2014 in Rome, and I wanted to share a few moments of it. Not actually a “live coverage” due to connectivity issues..” David Cuartielles talking about the importance of people for the open hardware movement: open hardware is not useful by itself, its people making great […]
I2C injection with the Bus Pirate
David Um writes: I decided to create a simple lab involving an Arduino Uno, in this case a SparkFun RedBoard, and a BlinkM LED that can be controlled over I2C. The Arduino would have a simple sketch that will update the color of the BlinkM and using a Bus Pirate I would then sniff traffic […]
#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 […]
Wearable quadrocopter
Nixie, a tiny wearable quadrocopter camera on a wrist band: Team Nixie is developing the first wearable drone camera, which can be worn around your wrist. The team will be presenting their prototype for the Intel Make It Wearable Challenge Finale on November 3, 2014 in San Francisco Via Embedded Day.
MSP430 propelled pendulum clock
DickB over at the 430h forum built this cool MSP430 propelled pendulum clock: This pendulum clock is not only regulated by the pendulum, but it is driven by it. A hidden magnet in the pendulum swings past a hidden coil and induces a current. This is detected and then a current pulse is fed into the […]
Sensor modules project
Elpis shared his sensor modules in the project log forum: On the PCB you will find a clear indication for the voltage range, the sensor name for quick searching, the read and write I2C addresses together with the pin out labeling. On top of those, a graphic representation of the sensor measuring values gives a […]
Bus Pirate v3.8 free PCB build
B-tronics built a free Bus Pirate v3.8 PCB. The Bus Pirate is an open source hacker multi-tool that talks to electronic stuff. 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 […]
Steam turret tank R/C controller
An instructable for a PIC based R/C servo controller by Steamhobby: The controllers capture the R/C receiver output, optionally manipulate the samples, then regenerate new servo control signals. As such, they greatly enhance what is possible with cheap servos. They were created for my Steam Turret Tank Instructable. Via the contact form. Check out the video after […]
App note: ESD and EMC sensitivity of IC
A good beginner app note (PDF) from NXP on protecting ICs from ESD. Integrated circuits are sensitive to electrostatic discharge (a sudden and short-time flow of currents) and electromagnetic fields (at which they can be source or victim of both of it). This application note shall be understood as an introductive basic description of what […]
App note: Power losses and junction temperatures on parallel Schottkys as secondary rectifiers in flyback adapter
Parallel Schottkys performance over single Shottkys app note (PDF) from NXP This document gives an overview of power losses and the consequential junction temperature rise of two parallel Schottkys as secondary side rectifiers in flyback power adapters with up to 12.5 W output power. The focus is set on a comparison of the parallel configuration […]
DIY bluetooth door lock
An open source bluetooth door lock, check out the step by step tutorial here at Make: To open the lock, we will use the app LightBlue. It has a section called the Sandbox, that lets you control the LightBlue Bean without having to program your own iOS app. When the LightBlue Bean receives a serial message, it checks […]