Download e-book for iPad: Building iPhone and iPad Electronic Projects: Real-World by Mike Westerfield

By Mike Westerfield

ISBN-10: 1449363504

ISBN-13: 9781449363505

Why easily play tune or go surfing in case you can use your iPhone or iPad for a few quite enjoyable tasks, akin to development a steel detector, hacking a radio keep an eye on truck, or monitoring a version rocket in flight? the right way to construct those and different cool issues by utilizing iOS equipment sensors and cheap corresponding to Arduino and a Bluetooth Low power (LE) Shield.

This hands-on booklet indicates you the way to jot down basic purposes with techBASIC, an Apple-approved improvement surroundings that runs on iOS units. through the use of code and instance courses equipped into techBASIC, you’ll the way to write apps at once in your Apple gadget and feature it engage with different hardware.

• construct a steel detector with the iOS magnetometer
• Use the HiJack platform to create a plant moisture sensor
• positioned your iPhone on a small rocket to assemble acceleration and rotation data
• Hack a radio keep an eye on truck with Arduino and Bluetooth LE
• Create an arcade video game with an iPad controller and iPhone paddles
• regulate a sweet computer with an iOS machine, a micro servo, and a WiFi connection

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Extra resources for Building iPhone and iPad Electronic Projects: Real-World Arduino, Sensor, and Bluetooth Low Energy Apps in techBASIC

Sample text

Again, it’s essentially the magnetometer app, just simpler because of the reduced number of plots. There are also a couple of cosmetic changes to the labels on the plot: SUB setUpGUI ! 05 seconds. 05) ! Initialize the plot arrays. 0 - 10 NEXT ! Initialize the plot and show it.

Table 2-1 shows the equivalent com‐ mands. Table 2-1. setMagRate There are also a number of obvious cosmetic changes, like changing variable names, comments, and strings so they make sense for the magnetometer. The only change of any real substance is due to the huge variation in the strength of magnetic fields. The accelerometer tops out at ±2G for all iOS devices until the iPhone 5, which has a maximum range of ±8G. Setting the vertical scale to ±2G works well. The gyroscope rarely exceeds 10 radians per second, so setting the y-axis to ±10 worked well for our gyroscope app.

TechBASIC calls it any time it is not busy doing The Accelerometer | 19 something else, which in this program means any time except when a tap on a button is being handled. The subroutine starts by grabbing the most recent accelerometer value. IF recording AND (t0 <> a(4)) THEN PRINT #1, a(1); ","; a(2); ","; a(3); ","; a(4) END IF Because this subroutine can be called pretty rapidly—more often than we’ve asked the accelerometer to collect acceleration information—we need to check to see if the time‐ stamp has changed since the last reading.

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Building iPhone and iPad Electronic Projects: Real-World Arduino, Sensor, and Bluetooth Low Energy Apps in techBASIC by Mike Westerfield

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