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Archive for December, 2011

ITead mystery PCB: TFT digital picture frame by Erick Aubin

Saturday, December 31st, 2011

Arhi received a mystery PCB with his last ITead PCB order: TFT digital picture frame with in built Real-Time clock and thermometer Designed by: Erick Aubin I assume B1 is a big capacitor, something like 22000uF or similar (judging from the size), USB-BUB is some ft232 or similar usb 2...

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Posted in documentation | 5 Comments »

App note: Interfacing 4/5/8 wire resisitve touch screens

Saturday, December 31st, 2011

Resistive touch screens are pretty cheap, and make it easy to interface with device without placing a lot of buttons. This app note describes how to interface with 4, 5, and 8 wire resistive touch screens on your next project. All analog touch screens consist of a ridged layer and...

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Posted in app notes | 1 Comment »

Happy New Year 2012 from Dangerous Prototypes

Saturday, December 31st, 2011

Happy New Year! Thank you for reading the blog and being part of our community in 2011. We're looking forward to more open hardware projects, more how-tos, more videos, more free PCBs, and more hacking in 2012.

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Posted in Holiday | 6 Comments »

Dot-dash-diss: The gentleman hacker’s 1903 lulz

Saturday, December 31st, 2011

Fans of tech history may want to read Dot-dash-diss: The gentleman hacker's 1903 lulz. This article appears on the NewScientist website and reveals that wireless hacking dates back to the time of Marconi! Any you thought you were onto something new with a walkie talkie on the frequency of the...

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Posted in documentation, hacks, vintage, wireless | No Comments »

DIY ATmega programing adapter using a IC testing clip

Saturday, December 31st, 2011

H used an IC testing clip to make a simple adapter for programing ATmega microcontrollers on the fly. IC test clips are tools used to grip ICs and provide easy connection to the pins. I’ve got a different use for it though. If you develop a circuit using an Atmega...

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Posted in DIY | No Comments »

App note: Advanced 1-Wire Network Driver

Saturday, December 31st, 2011

This reference design shows how to drive long 1-Wire networks. 1-Wire is a communications protocol used by some Dallas/Maxim parts. The protocol uses only one wire for power, transmission, addressing, and synchronization. This document describes a microcontroller-based 1-Wire master interface for reliable operation of small, medium size and large 1-Wire...

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Posted in app notes | 3 Comments »

xQFP protoboard free PCB build

Saturday, December 31st, 2011

Juan used his free 0.50mm Dangerous xQFP protoboard to get started with a MSP430F5510. The protoboard is designed to get you up and running with a new surface mount microcontroller. We're super proud of this board, it's something we use all the time to develop our own projects. Currently available in...

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Posted in builds | 1 Comment »

Bus Pirate v4 free PCB build

Saturday, December 31st, 2011

Fcobcn posted pictures of his free Bus Pirate v4.0 PCB build. 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 your own handy Bus Pirate for $30,...

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Posted in builds | No Comments »

Teensy 2.0 based transistor tester

Friday, December 30th, 2011

Wingnut decided to port the AVR transistor tester to his Teensy 2.0 board. The transistor tester is a tool for identifying and measuring common discrete semiconductors and passive devices. I decided to port the component tester (freely using Google Translate to get some sense of the comments) as my first...

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Posted in project logs | No Comments »

DIY iPhone remote automotive ignition

Friday, December 30th, 2011

Will O'Brien developed this project allowing him to remotely start his car via an SMS sent to a jailbroken iPhone. The additional hardware involved is an Arduino, iPhone breakout board such as the PodBreakout Mini, 4x 10k resistors, 1x TIP120 and a 5 volt switching supply cell charger. All the...

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Posted in Arduino | 1 Comment »

Free PCB coupon via Facebook to 2 random commenters

Friday, December 30th, 2011

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 a every week: Free PCB...

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Posted in Free PCBs | 1 Comment »

Week in (p)review: December 30, 2011

Friday, December 30th, 2011

Here’s a summary of major developments over the last week. Free PCB Friday is coming up soon: USB Infrared Toy firmware v22 final released Bus Pirate v3.5 is back in stock at Seeed Studio Jawi uploaded a preview of the new signal display component for the Logic Sniffer application Logic...

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Posted in week in review | 8 Comments »

Soldering iron driver update

Friday, December 30th, 2011

Arhi posted pictures of his latest soldering iron driver build: Here are the pictures of the populated board. Actually the DC driver is not populated as I'm not very interested in it and there's no usb connector and D10, R40 as those are also only required for USB operation and...

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Posted in project logs | No Comments »

Nokia 1100 LCD interfacing with a microcontroller

Friday, December 30th, 2011

Circuitvalley posted a step by step guide to interfacing Nokia 1100 LCDs with a microcontroller. Via the comments.

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Posted in how-to | No Comments »

Logic Sniffer 16-bit input buffer wing back in stock

Friday, December 30th, 2011

Logic Sniffer 16-bit input buffer is back in stock at Seeed Studio. This accessory buffers the extra 16 I/O bits on the 'wing' header. The Open Logic Sniffer buffer wing in stock and shipping now for $15.

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Posted in logic analyzer | 2 Comments »

KS0108-based Graphic LCD overview

Thursday, December 29th, 2011

Raj shows how to interface GLCDs with KS0108 controllers to PIC uCs. He covers the protocol used, LCD memory mapping, and how to write up the firmware using microC compiler. The use of a graphical LCD (GLCD) drastically changes the look of your project. It provides more freedom for presenting...

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Posted in tutorials | 2 Comments »

Em:Blocks PIC24 and PIC32 plugin for Code::Blocks IDE

Thursday, December 29th, 2011

Code::Blocks is an open source IDE designed around a plugin framework to make it easy for users to extend/improve it without having to touch one line of Code::Blocks' source code. Em::Blocks is one such plugin which adds PIC24 and PIC32 development functionality to the Code::Blocks IDE. Jim via the contact...

Posted in code, compilers, open source | 1 Comment »

Test Nixie tubes with a flip of a switch

Thursday, December 29th, 2011

[embed]http://www.youtube.com/watch?v=pSZMMpjQ5KU[/embed] This Nixie tube tester has an 11 position switch to change the displayed digits. A simple device for testing and/or healing Nixie tubes of IN-18 type. An 11-pole switch is connected in series with a 50 KΩ pot (+ 470 Ω resistor for safety), powering from an 180V DC...

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Posted in DIY | No Comments »

Small 10 mW thermogenerators available retail

Thursday, December 29th, 2011

This device is a tiny SMD thermogenerator that harvests heat energy to generate up to 10 milliwatts of power. Dev boards are available at Mouser for a mere $700 retail. In case of Micropelt devices, one side is placed near the heat source and the other side has a fixed...

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Posted in parts | 10 Comments »

Logic Sniffer client: New signal display component

Thursday, December 29th, 2011

Jawi uploaded a preview of the new signal display component for the Logic Sniffer application. OLS is a java client designed to run on multiple platforms including Windows, Linux, and Mac. You can download this mock from ols.lxtreme.nl, which should run on Windows, Linux and OSX (only the latter is...

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Posted in logic analyzer | No Comments »

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Recent Comments

  • Pekka Akselin: This is ridiculous!? :-) We are back at 256(!) byte EPROMs that needed multiple, a handful, of voltages to run! :-(
  • KH: Let's try a back-of-envelope calc balancing energies. From MCP1700 datasheet, there are graphs for a 200mA load step. Estimate the energy shortfall as 12uJ. Say...
  • Daniel: It's been a week and my comment is still awaiting moderation. Apparently the CIA doesn't want their involvement known?
  • KH: Agree, so okay, I guess he must have learned from somewhere. 100nF and 1000uF is so far apart, that was jarring; it's more magic incantation...
  • Max: I have a suspicion the hefty electrolytic cap might be some sort of cargo cult carry-over from other RF-based projects - for instance, I've seen...