README.md

TinyTX

This repo picks up on the work on Nathan Chantrell, sadly R.I.P. late 2020.

• Nathan's website via Archive.org
• Nathan's TinyTX repo on Github
• Archive of TinyTX3 hardware

Motivation

Since Nathan created TinyTX, both chips have evolved:

1. RFM12B -> RFM69
2. ATtiny84 -> ATtiny 0,1 series e.g. ATtiny1614

High level design

This project will create a TinyTX4 using:

1. RFM69HW
2. ATtiny1614
3. lowpowerlab's RFM69 library

And release all hardware and software in this repository.

Radio module choice

Here is a comparison of RFM69 variants:

Variant	Output (dBm)	Pinout	Size (mm)
RFM69W	13	RFM69W	19.7 x 16
RFM69CW	13	RFM69CW	16 x 16
RFM69HW	20	RFM69W	19.7 x 16
RFM69HCW	20	RFM69HCW	16 x 16

i.e. RFM69W and RFM69HW share pinout, but are larger (19.7 x 16)mm vs the RFMCW and RFMHCW (16 x 16)mm.

For interoperability between normal and high-power modules, we'll go with the RFM69(H)W modules.

Hardware versions

• TinyTX4 (monopole and SMA)

Software

See software page.