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A little background... here are my first two Halloween projects: The Scary Door The Scary Porch   Now my third one... In this project I want to control a ton of LEDs and output sound.  Sound I have covered, from the Scary Porch project. However, the LEDs are the nightmare.   I am currently using shift registers to address all the LEDs in the group, working on controlling 100 LEDs right now. A shift register take 1 output and turns it into 8. It's working, but this seems like ...
When putting together a Home Automation System together it is often necessary to gather analogue data. This could be from temperature / humidity sensors or to measure battery voltage. Often these are remote to the computing module which could be a Raspberry Pi, and Arduino or a PC - for example when gathering data from a weather station on the roof of a building.   This example below shows how the DART and the URR could be used to gather useful information from around the home.   &# ...
This post shows how to use the Dual Analogue Radio Transmitter (DART) and the Universal Radio Receiver (URR) to monitor the temperature of one or more freezer.   The DART collects data from 2 analogue inputs and transmits this to a receiver using a 433 MHz FM radio module. (FM radio modules gives gives significantly better range and noise performance when compared to AM modules). More information on the DART and URR can be found here.         The TMP36 is very easy to ...
Raspberry Pi is a great tool for teaching. Its affordable price makes it appealing for students and teachers that can make interesting "experiments" without spending a fortune.   The understanding of optics requires lot of geometry, but equations are deeply understood only by a small number of students. Drawings may help, but making them requires some ability and precision. Needless to say, in most cases, the result is static and, in order to understand what happens in different conditions ...

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