radio

Hackaday Prize Entry: Sub Gigahertz RF

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For his Hackaday Prize entry, [Adam] is working on an open source, extensible 915 and 433 MHz radio designed for robotics, drones, weather balloons, and all the other fun projects that sub-Gigaherts radio enables.

The design of this radio module is based around the ADF7023 RF transceiver, a very capable and very cheap chip that transmits in the usual ISM bands. The rest of the circuit is an STM32 ARM Cortex M0+, with USB, UART, and SPI connectivity, with support for a battery for those mobile projects.

via Hackaday Prize Entry: Sub Gigahertz RF — Hackaday

Hackaday Prize Entry: Sub Gigahertz RF

Pidgeon 1 Sub-GHz Radio

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Pidgeon 1 on Crowd Supply is a sub-GHz radio with 500 mW transmission power, RS485 networking interface and a STM32F0 microcontroller:
front-and-back_jpg_project-body

Crowd Supply: Pidgeon 1

No more restrictions from high level software! Access the lowest level of digital radio transmission with this programmable sub-GHz wireless module.

https://www.crowdsupply.com/samuel-zak/pidgeon-1
https://www.crowdsupply.com/samuel-zak/pidgeon-1

Hardware Specifications:

  • Radio – CC1120 + CC1190
  • Controller – STM32F051K6
  • FTDI USB interface – FT234XD-R
  • RS485 interface – LTC2850IDD
  • Buck converter – RT8010GQW
  • SMA connector for antenna
Pidgeon 1 Sub-GHz Radio

Tiny CW Capacitive Touch Paddle

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Edgar implemented capacitive touch sensing using an ATTiny4 to create a touch paddle for Morse code:

Tiny CW Capacitive Touch Paddle

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Like many no-code operators, after being on the air for a while, I developed an interest and appreciation for Morse Code [..] I purchased a cheap paddle, but I found the clicking noise a little bit annoying.

https://hackaday.io/project/19129-tiny-cw-capacitive-touch-paddle
https://hackaday.io/project/19129-tiny-cw-capacitive-touch-paddle

 

The goal of this project was to create a single PCB with an ATTiny4 AVR, a battery, transistors and a 3.5mm connector jack. The paddle is designed to have exposed conductive material in order to read the capacitive touch.

https://hackaday.io/project/19129-tiny-cw-capacitive-touch-paddle
https://hackaday.io/project/19129-tiny-cw-capacitive-touch-paddle
https://hackaday.io/project/19129-tiny-cw-capacitive-touch-paddle

The under 1kB binary code worked well and without error. This made me wonder how small I could make this code. After optimizing the code, I managed to shrink it to under 512 bytes.

Tiny CW Capacitive Touch Paddle