In this article we look at an Ambient Light sensor, the LTR-303 and connect it to an Arduino Uno Sensor Information The LTR-303ALS is a low cost,small, I2C Ambient Light sensor. The LTR-303ALS comes in a 2.0×2.0x0.7mm 6pin DFN package. The LTR-303ALS has an operating...
I recently tried out an example for a DS18B20 temperature sensor. The code example mentioned 2 libraries, so I went forward and downloaded them and imported them into my IDE but was disappointed to see an error like this when I tried to compile my...

In previous posts we showed some examples for the 4067 16-Channel multiplexer - Arduino and 4067 LED example The HCF4051 device is a monolithic integrated circuit fabricated in MOS (metal oxide semiconductor).

The is a 16-bit, general purpose parallel I/O port expander for I2C bus applications. The 16-bit I/O port functionally consists of two 8-bit ports (PORTA and PORTB). The MCP23017 can be configured to operate in 8-bit or 16-bit modes. Lets look at the pinout [caption...
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