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#Cw decoder and raspberry pi how to
#Cw decoder and raspberry pi software
#Cw decoder and raspberry pi code

#Cw decoder and raspberry pi code

I had a little head start in Morse code thanks to the work I had previously done on a small Morse code library and training program. Depending on your photoresistor, different resistances may work better for you. The 220 Ohm one gave me a good reading on the ADC with my particular photoresistor. I played around with a flashlight and some different sized resistors on that photoresistor voltage divider. Here’s the layout: The wiring diagramĪnd what it actually looks like: The actual laserComm hardware. (You can alternatively do SPI off of GPIO ports with software, if you prefer.) The laser just hooks directly between a GPIO and +5V. I decided to talk to the ADC with the RPi’s hardware SPI interface, which I had already enabled.

#Cw decoder and raspberry pi how to

You can learn how to use the ADC at this Adafruit tutorial.

Laser module – to transmit with laser light.

MCP3008 10-bit Analog-to-Digital Converter (ADC) – Since the RPi doesn’t come with an ADC, this is required for converting analog voltage from the photoresistor into a signal I can process on the RPi.

A 220 Ohm resistor – to make a voltage divider with the photoresistor for reading the input signal.

Photoresistor – Just a little guy that has variable resistance based on how much light is hitting it.

This does the sending, receiving, and signal processing. This post explains how I did it, and how you can do it too. Sending and receiving text with Morse code light pulses across the room (or to your neighbor) is a fun and cheap project you can do on a Raspberry Pi or Arduino or any other microcontroller.

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Smart holiday lights that change colors for the next upcoming holiday.

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Measuring the Tonga eruption pressure wave with a home weather station.

Host your own contacts and calendars and share them across devices.

The Infopanel: a simple MQTT-connected display system for weather, traffic, pictures, animations…anything!.

Sending and receiving Morse code with a laser and a Raspberry Pi.

The modern era passed through a cathode ray tube.

#Cw decoder and raspberry pi software

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