Author Archives: DP

App note: Principles of SAWR-stabilized oscillators and transmitters

Principles of SAW-stabilized oscillators and transmitters from EPCOS, app note here (PDF!) This application note describes the physical principle of SAW-stabilized oscillator. Oscillator structures for one- and two-port SAW resonators are discussed. An application example for a 433.92MHz transmitter for keyless entry is given

Classic joystick to USB adaptor

MatthewH wrote this instructables describing how to use an Arduino Leonardo (or similar) card to make your classic console joystick look like a USB keyboard: If you grew up in the early 1980’s and were into video games, you probably had an Atari 2600, ColecoVision, or similar game console. The controllers or joysticks for each […]

Temperature controlled reflow oven build

Matt of SkyLabs has a nice build log about a temperature controlled reflow oven he built using an Arduino based PID controller and a standard toaster oven: We have successfully managed to build a temperature controlled reflow oven using an Arduino based PID controller and a standard toaster oven from Robert Dyas! This is a must […]

Data logger handles four thermocouples

Charles Edward Pax has announced that the T400 temperature datalogger is now being offered on Kickstarter! The Pax Instruments T400 datalogger is an open source four-channel thermocouple temperature datalogger based on the Arduino™ Leonardo platform. It is ready to use out of the box with the features you want most. Measurements can be logged to […]

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 September 12, 2014

Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon. The next hackercamp Shenzhen group gets a customized Shenzhen metro card Bus Pirate v3.8 free PCB build Check out spanner888’s telecine film digitisation in the project log forum Coming up: Free PCBs via Facebook on Friday App notes […]

Freedom freescale KL25Z board

Jan Henrik posted another Instructables, an introduction to the Freedom Freescale KL25Z board: Hello, today I want intoduct you to the Freescale Freedom Board with the KL25Z processor. It is a development board, builded and selled by Freescale. It features a ARM® Cortex™-M0+ , working on 48Mhz. Features: 48Mhz 128KB Flash 16KB SRAM USB OTG An […]

Telecine film digitisation

spanner888  writes: Finally got prototype working and have captured over 90,000 frames with promising results. Noticed along the way that SMD component tapes fit the 16mm film sprocket really well, so there is food for thought! Documenting an outline of build and all the useful stuff from around the web that helped me out on […]

Energia vE0013 release adds low power, CC3200 WiFi LP and CC3100 BP support

The Energia team announces the availability of version vE0013.  We wrote about it previously: A new version of Energia has been released. Energia is an open-source electronics prototyping platform started by Robert Wessels in January of 2012 with the goal to bring the Wiring and Arduino framework to the Texas Instruments MSP430 based LaunchPad. It […]

Using a USBASP v2.0 as a cheap ATmega8 Arduino platform

JohnLittle writes: I finally got round playing with my AVRASP v2.0 boards. The ones Sleepwalker3 mentioned. Thanks mate! I bought three USBASP v2.0 on ebay for under £1.50 each. They each came with a short cable (5×2 sockets at each end). However, they do not come with the JP2 header soldered on. Solder it or […]

HandyStick, batch of PCBs from DirtyPCBs

Niels Kjøller Lab writes: HandyStick is yet another small development board with an AtmegaX8 (Atmega88, Atmega168, Atmega328). The board is targeted towards use with vUSB, a software implemented USB stack. My first project is a DIY game pad. It is cheap to manufacture, fitting two on a cheap 5x5cm 2-layer pcb, and using easy-to-source parts. […]

Hard disk drive clock with Arduino Uno

ACVoltage  wrote this instructable detailing his DIY POV clock using hard disk drive and Arduino Uno: This is a fun project that can be done easily and also cheaply. In this instructable we will explain step by step how to make this beautiful POV clock. Used material: -Arduino Uno, -Tiny RTC modul, -ULN 2003, -IR diode and IR transistor […]

#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 […]

Arduino ultrasonic range finder, with I²C lcd display

An Arduino rangefinder with an ultrasonic sensor and an I²C interface display by Jan Henrik. He wrote an instructables here: The maximum rated range is 500 cm, the range is measured 20 times per seccond. It is Displayed on a lcd screen which is 20×4 chars big, it has a custom start message, and it can […]