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Use the Arduino CAN shield, but solder some jumper wires from the TXD, RXD, and GND lines over to another board with an AU5790 on it. … Download the schematic and PCB designs for the Arduino CAN shield, and adjust the design to accept the AU5790 instead of the MCP2551. …

This is quite normal. Segment displays like that are usually available in both common anode and common cathode types. What you originally had was a common cathode type. What you have now is a common a …

I agree with Anindo Ghosh, an infrared transceiver is one of the best ways to detect these small movements without touching the surface. But I'd like to add some advice on how to use these properly. …

The sensor detects the magnet, and sends its output to the Arduino. This has the advantage that it works even when it's wet or dirty. …

The way to do this is with a Hall effect sensor. I like the Allegro A1324. It's a simple device. Give it 5v and 0v on pins 1 and 2. Pin 3 gives a voltage proportional to the magnetic field. You can …

The sensor is connected between + power and the Arduino input, while the LED is connected between - power and the Arduino input. … The electrical charge inside the Arduino sensor pin which was giving it a high voltage, will now flow as current through the LED to - power, bringing the voltage down, so that the Arduino sees you've let …

An arduino can't directly provide this kind of voltage, or even the kind of current required by the lock, so you'll need a driver to interface. …

You can buy strings of addressable LEDs, and there's Arduino code to control them. There are loads of different types available. …

There are two things you should do. Firstly, implement a little bit of hysterisis. Currently, it look like you're using 200 as the threshold in both the rising and falling direction. What you'll alway …

What you're looking for is called a Trapezoidal velocity profile. There is no need to use sin waves. Smooth motion can be achieved by simply linearly ramping up the velocity to its maximum, holding …

You can almost certainly do this easily using a PSoC3 or PSoC5. The PSoC chips are microcontrollers that contain re-configurable digital hardware, a bit like an FPGA or CPLD. This means you can make …

You are designing a mobile robot. Forget about Asimov, the real three laws of mobile robotics are: Everything in it goes wrong all the time. There's a battery in the way. It broke down. Whatever e …

Is it on the Arduino? …

The impedance buffer (an op-amp) is optional, but will result in much better sensor readings, especially as you intend to use fairly long wires to connect the sensor to the Arduino. …

This way you have have your Arduino send data into one power socket, which will be read by another device attached to a light fitting. …