RaspiQRP
This is a project that takes:
- an SDR stick
- a Raspberry Pi Zero 2 W
- an USB audio card
- some wires, indicators and screens
- an RF amplifier
and turns them into a full-fledged QRP!
Currently there is no prototype, yet there is a plan present, which is good.
The total cost of this device seems to be around 90€, while the cheapest QRP I found on Aliexpress is 100€. This difference might seem insignificant, but I bet that you have at least 70% of the supplies needed somewhere in your shack. The screens, buttons and leds are absolutely replaceable, but you'll need to tweak the code a it.
As of right now, the planned device will be composed of:
1. Raspberry Pi Zero

- To take input from a potentiometer(encoder) in order to shift the frequency that we want to TX/RX.
- To control the RTL-SDR stick and pipe the audio to the speaker, through the USB audio card.
- To stream audio from the microphone, and pipe it to rpitx(this project is really cool)1 which then will get amplified using the amp.
2. Arduino TM4638 board

- Using this library.
- To spare us of the pain of wiring an LCD.
- View the current frequency we're at.
- To let us change the bands, using the 8 buttons on the bottom.
- Indicate states of the device using the LEDs.
Wiring
Sorry in advance for the trashy diagram, but this is my first ever attempt at wiring diagrams. The rtl-sdr and the audio card need to be put in the usb port, using a hub of some sort.
Description
Languages
Python
91.5%
Shell
8.5%