Although it was intended to be a project where a single device (a D-STAR capable transceiver) was to be designed and built, this was quickly changed into a more layered approach. Different (groups of) people wanted different features, and that eventually became too complex for a first attempt at this.

So, after many discussions, back-and-forth email sessions and endless hours of typing on MSN (yes..), it was decided that initially, the following devices would be designed:

ALIX MicroITX PC systems

Ultra-low-power PC systems for use in D-STAR hotspots and D-STAR repeaters, and their various options. The ideal solution for running D-STAR software!

Cables, Connectors and (RFI) Clamps
Pre-made radio cables for connecting a Node Adapter, Mini-Hotspot, NQSMHS or HSA modem board to a modern(-ish) transceiver that supports 9600-bps mode and which features a PS/2-style connector for this mode of operation.

BeagleBone Capes
Various expansion boards for the BeagleBone BLACK micro-computer board.

Velleman K8055 USB I/O

Use the K8055 to connect all sorts of I/O devices (relays, switches, LEDs, motors, sensors and so on) to your PC! This kit is also used by many to connect radio transceivers to their PC running Sound Card based repeater software.

Node Adapter

A re-implementation of the original GMSK Node Adapter by Satoshi Yasuda, with some added features thrown in. It can be used both as a standalone repeater, as well as linked up to the D-STAR G2 network with the help of the DVAR HotSpot application for PCs running Windows.


A trimmed-down version of the wellknown Node Adapter design, designed to be used with the DVAR HotSpot application for Windows PCs. Nice and small, just what the doctor ordered!

HSA Firmware for Mini-HotSpot and Node Adapter

The new, separately developed firmware for the Mini-HotSpot and Node Adapter series of products.

DM-1  GMSK Smart Modem

In every way the basis of all products, the Smart Modem is the part of DUTCH*Star that connects to a radio transceiver on one end, converts the GMSK-modulated audio signals to bits, and then processes those bits into manageable frames, according to the D-STAR DV Radio Protocol. These frames are then output on the serial port, to whatever is connected to it - usually, a PC of some kind. The connected system is then responsible for doing something useful with those frames. The modem features an USB connection to the PC, and is powered from the USB bus. Its communication protocol is simple, easy to implement and does not require special drivers of libraries, as it emulates a standard serial ("COM") port to the operating system.

DT-1  Digital Standalone Terminal

Next-up in features, complexity and cost is the Standalone Terminal. Designed for use as a standalone messaging monitor, the DT-1 contains a variant of the DM-1 technology, combined with its own local high-performance CPU, graphical LCD and keypad, thus eliminating the need for a PC in several applications. It can deal with various uses of the D-STAR system, such as a repeater monitor, a short-message device, but also as a data gateway into the D-STAR network. For easy messaging functionality, a PS/2-style keyboard connection is available.

DS-1  Digital Station

The flagship of the DUTCH*Star line, the DS-1 is a complete radio transceiver with modular design. The basic transceiver consists of a RF transceiver module (available are modules for the 2m, 70cm and 23cm ranges; others may follow) and all other modules required to implement a complete analog FM transceiver. It also supports D-STAR, however, by addition of the DS-1DV module which is another variant of the Smart Modem. Practically speaking, the Digital Station is a DT-1 Standalone Terminal, coupled with a complete radio transceiver in a single enclosure.

DV-1  Digital Voice module

Not a standard product as such, but really an add-on module to the other products, adding DV (Digital Voice) audio capabilities. The module contains an AMBE-2020 Vocoder chip plus associated components to add or create an analog endpoint to the project.

Friendcom FC-301/D Mini Transceiver

Used in many of our projects, this little radio transceiver can do a lot in both analog as well as digital radio projects.  For small, leightweight repeaters (such as the D-STAR Portable HotSpot) or even beacons, this small, cheap transceiver can do it!

You can find the Node Adapter clone boards here.

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