中途半端
フォトレフレクタ(TPR-105)は赤外線LEDと赤外線フォトトランジスタを内蔵し、反射した赤外線量に応じてベースに流れる電流が変化する。つまり反射量が多いとエミッタ電流は大きくなる。上の回路では接地前に可変抵抗を入れ、書き込むプログラムを書き換えることなく感度を調節できるようにしている。一定の電流で抵抗値が大きくなれば、電圧も高くなるので感度は良くなる。 前回のLCDセットで電圧を可視化している。 #include <avr/io.h> #include <avr/interrupt.h> #include <stdio.h> #include "lcdLib.h" FILE lcd_str = FDEV_SETUP_STREAM(lcd_putchar,NULL,_FDEV_SETUP_WRITE); void wait(int time) { volatile int i; for
March Madness Backlog: Microcontroller Pixel Font – NYC Resistor
It’s been a while since we had a March Madness post, so here’s a little snippet from this past weekend: a script for processing small pixel fonts for use in 8-bit AVR applications. Like this: I couldn’t find any free 7-pixel-high fonts that I liked, so I whipped one up in GIMP. Here’s the source image that I generated the font from: Getting a raw B&W image into a usable format after the cut. The
Atomthreads: Open Source RTOS | Free Lightweight Portable Scheduler
Atomthreads is a free, lightweight, portable, real-time scheduler for embedded systems. It is released under the flexible, open source BSD license and is free to use for commercial or educational purposes without restriction. It is targeted at systems that need only a scheduler and the usual RTOS primitives. No file system, IP stack or device drivers are included, but developers can bolt on their
あなたの心に“バイブレーション”――モチベーションタイマー「MotivAider」
MotivAiderをCD-ROMケースに載せてみた。サイズ自体は大きくないが、米国製だけあって厚みはけっこうある。ベルトに付けて使うのだが、上着を着ていないと間違いなく歩数計と間違われる 「MotivAiderは、自分の行動に、望ましい変化を自動的にもたらす著しくシンプルなデバイスです。ユーザーは変化が習慣になるまで、あなたの心にバイブレーションという信号を送り続けます」 これは、米国で販売されているタイマー「MotivAider」の説明書の冒頭に書かれている言葉。これを使うと、新しい習慣を容易に身につけることができるという。そのカラクリはいったい？ モチベーションアップ専用のタイマー「MotivAider」 大橋悦夫氏をはじめ、徳力基彦氏、平本相武氏など多くの人が指摘している通り、何かをやり遂げるモチベーションを維持したり、何か新しい習慣を身につけたりするにはタイマーが有効だ。 しかし
Cheapest standalone arduino?
From the MAKE: Flickr pool Gao writes – Hi my master: I has made a cheapest Standalone Arduino mini use ATMEGA8 and breadboard. maybe you would like see it,here it’s photo on flickr: http://www.flickr.com/photos/whaleforset/3197918087/ If you think that’s funny enough to post on makezine’s blog,,,just do it. Thank you very much for reading and sorry for my english. Please no apologies – you’ve obv
Arduino 日本語リファレンス
Arduino言語 Arduino言語はC/C++をベースにしており、C言語のすべての構造と、いくつかのC++の機能をサポートしています。また、AVR Libcにリンクされていて、その関数を利用できます。 setup() loop() 制御文 if if else switch case for while do while break continue return goto 基本的な文法 ; (セミコロン) {} (波カッコ) コメント #define #include 算術演算子 + - * / % (剰余) = (代入) 比較演算子 == != < > <= >= ブール演算子 && (論理積) || (論理和) ! (否定) ビット演算子 ビット演算子は変数をビットのレベルで計算するためのものです。ビット演算子によって、広範囲なプログラミング上の問題を解決することができます。 &
Technology Archives
David bought his first Arduino in 2007 as part of a Roomba hacking project. Since then, he has been obsessed with writing code that you can touch. David fell in love with the original Pebble smartwatch, and even more so with its successor, which allowed him to combine the beloved wearable with his passion for hardware hacking via its smartstrap functionality. Unable to part with his smartwatch swe
Upgrade your Arduino projects
current: @adafruit - previous: MAKE, popular science, hackaday, engadget, fallon, braincraft ... howtoons, 2600... View more articles by Phillip Torrone Ladyada writes– Running out of space in your big Arduino project? Good news! Finally, after months of backorders, one can now buy the latest improvement to the ‘ATmega8′ line of chips: the ATmega328’s. The ‘328 has 32K of flash, and 2K of SRAM.
Arduino-based AVR High Voltage Programmer
Update 01/02/09: A PCB version of this circuit is in the design stages – some preliminary information is here. Update 03/11/09: Kits based on this design are now for sale! Update 12/14/10: The original AVR HV Rescue Shield kit has been replaced by the new and improved HV Rescue Shield 2. Visit the HV Rescue Shield 2 product page for information about the new kit! As I mentioned earlier this week,
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This spoon-centered art installation is constructed using a 10’x10’ pop-up canopy as a base. All four sides are hung with partially see-through “curtains” made from 1400+ metal spoons of various sizes attached with jump rings and interwoven with aluminum wire. One side has an opening in the middle of its “curtain” as a doorway into […]
Technology Archives
David bought his first Arduino in 2007 as part of a Roomba hacking project. Since then, he has been obsessed with writing code that you can touch. David fell in love with the original Pebble smartwatch, and even more so with its successor, which allowed him to combine the beloved wearable with his passion for hardware hacking via its smartstrap functionality. Unable to part with his smartwatch swe
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AVR® Fuse Calculator – The Engbedded Blog
「USBマイクロマルチコントローラ」を使用したスクリーン・セイバ・キャンセラの作成 (キットと初歩の電子工作 Kits and Kids)
http://brown.ap.teacup.com/nekosan0/816.html
ジャンク宿: 4x4 Project
http://separaterealities.com/projects/acceled_pong/