Close
0%
0%

Tiny4FSK

Reliable high-altitude tracking system using the Horus Binary v2 protocol

max-kendallMax Kendall
Following
Liked Like project

Just one more thing

To make the experience fit your profile, pick a username and tell us what interests you.

Pick an awesome username
hackaday.io/
Your profile's URL: hackaday.io/username. Max 25 alphanumeric characters.
Pick a few interests
Projects that share your interests
People that share your interests

We found and based on your interests.

Choose more interests.

OK, I'm done! Skip
Similar projects worth following
1.7k views
3 comments
10 followers
View Gallery
Tiny4FSK is an extensible high-altitude balloon flight computer with built-in tracking using the Horus Binary v2 tracking system.
Tiny4FSK uses:
- the SAMD21 microcontroller, which is an ARM Cortex-M0+ MCU
- the TPS61200 boost converter, which is adjusted to output 3.3v
- Si4063 radio module, which I use on the 70cm band
- ATGM336H gps module - pretty cheap GPS module which works in airborne mode (>18km)
- integrated BME280 temperature, pressure, and humidity sensor
The code uses the Arduino framework to make it accessible to beginners

This project was graciously sponsored by PCBWay. They provide low-cost PCB fabrication and assembly services. The pictured PCBs were fully assembled by PCBWay's services! Check them out at https://www.pcbway.com/.
  • 1 × SAMD21G18A
  • 1 × Si4063 Application Specific ICs / Telecom ICs
  • 1 × TPS61200 Power Management ICs / Battery Management ICs
  • 1 × ATGM336H GPS module
  • 1 × BME280 Temperature, Pressure, and Humidity Sensor

View all 6 components

Enjoy this project?

Share

Discussions

Adam Wakelin wrote 01/12/2026 at 07:02 • point

Hey Max,

Just took a look at your project page and your GitHub. You are doing some awesome work and I can't wait to see what you make next! If you aren't already registered, I would recommend studying for a HAM Radio License. It's a really great way to learn about radio technology and goes hand-in-hand with your work on weather balloons.

  Are you sure? yes | no

Max Kendall wrote 01/12/2026 at 23:45 • point

Hey Adam!

I'm an amateur extra :p thanks for the thought though! I agree completely, it's a great way to learn more about radio electronics, especially with the extra material (which helped me through much of this project!)

-Max

  Are you sure? yes | no

Adam Wakelin wrote 01/13/2026 at 06:27 • point

Ha, that's awesome! I had a feeling that you were either just really advanced with radio or you were already a HAM, especially when you dropped lingo like the "70 cm band". I was going to take my General and Extra exams but just never got around to it. Maybe one day!

  Are you sure? yes | no

Similar Projects

A small RYBG_211_LITE BLE module comes with integrated antenna which provides a great range of 200meters. Now it is time for offline message
Project Owner Contributor

REYAX BLE - A getting started Guide

sagar-001Sagar 001

This module is a simple PoE module using W5500 from WIZnet.
Project Owner Contributor

Easy PoE and Ethernet modules

minermillerMinerMiller

Home Automation and Security
Project Owner Contributor

Neuron Tech

michael-otooleMichael O'Toole

Low cost radio module highly stable
Project Owner Contributor

PK-RF-31 low cost IoT radio module

peritronicsperitronics

Does this project spark your interest?

Become a member to follow this project and never miss any updates

By using our website and services, you expressly agree to the placement of our performance, functionality, and advertising cookies. Learn More

Yes, delete it Cancel

Report project as inappropriate

You are about to report the project "Tiny4FSK", please tell us the reason.

Send message

Your application has been submitted.

Remove Member

Are you sure you want to remove yourself as a member for this project?

Project owner will be notified upon removal.