I’m working on an embedded software-defined radio for sending PSK31 telemetry data that can run in the BeagleBone Black PRU (or perhaps repurposing the LCD interface) as well as smaller devices like the Teensy 3.1 with an embedded Digital-to-analog converter. Preliminary source is available from github….
BeagleBone Black PRU
Using a BeagleBone Black instead of the teensy opens up more useful spectrum. The DAC on the Teensy is limited to mostly audio frequency ranges, but the PRU can easily generate a smooth 2.5 MHz carrier. A simple R2R DAC isn’t the cleanest , but generates acceptable signal that was capable of being received a few meters from the IC-7000 without any amplifier.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Python for Microcontrollers — Python on Microcontrollers Newsletter: Mu 1.2.0 Released, WSL Out of Beta and so much more! #CircuitPython @micropython @ThePSF @Raspberry_Pi
