Connecting to the micro:bit. Light sensing with the LDR.

Описание: I have a nice little analog-to-digital (A-D) board using the PCF8591 chip. It has 4 analogue channels, and on the board is a LDR (for light sensing), thermistor (temperature) and a variable resistor (trimmer), which makes it a great bargain for £1.

The 8591 can connect to the micro:bit using the two wires of the I2C interface, so I show how to do this, and how to talk to the chip (and read light values) using Python.

Some links:
The Mu editor (for Python) on Windows: https://codewith.mu/

LDR tutorial: http://www.technologystudent.com/elec...

Thermistors and LDRs: http://www.bbc.co.uk/schools/gcsebite...

The Internet of Shed video (uses the PCF 8591 also):    • The Internet of Shed  

Looking at the micro:bit using a logic analyser:    • Saleae Logic Analyser on the micro:bit and...  

PCF 8591 data sheet: http://www.nxp.com/documents/data_she...

Sample PCF 8591 board:
http://www.gearbest.com/development-b...

Kitronik edge connector for micro:bit : https://www.kitronik.co.uk/bbc-micro-...

By the way, I used a different microphone for this video. I'd be happy to hear any comments about the quality and whether better/worse than previous videos.