APRS Transciever

motivemachine·APRS_Transciever·DRA818nano/DRA818nano.kicad_pcb

APRS Transciever PCB layout, top view — open source board by motivemachine

About the APRS Transciever PCB

APRS Transciever is an open source PCB design by motivemachine, published on GitHub. It is a 2-layer board measuring 17.8 × 43.2 mm, with 37 components from 24 distinct parts.

Other key parts include the DRA818, AP1117-33 and AP1117-50. By type, the board carries 17 resistors, 6 connectors, 5 capacitors, 3 ICs, 3 transistors and 1 antenna.

It belongs with the rf & radio and displays & leds designs in this gallery.

From the project

Design for a complete 2 meter band transciever, designed around the DRA818U/V and the arduino

This project is made possible for amateur designers like me thanks to the work of:

markqvist and his APRS library: https://github.com/markqvist/LibAPRS

darksidelemm and his DRA818 serial library: https://github.com/darksidelemm/dra818

Progress: Currently the basic Kicad schematic is complete, using an arduino nano and two bss183 mosfets to convert the 5v IO to 3.3v for the dRA818V. Resistors on Arduino Nano pins 4-7 form the DDS as used with LibAPRS. No other interfaces are yet included, but many are planned (gps, display, etc.)

Main components on the APRS Transciever

DRA818 AP1117-33 AP1117-50

APRS Transciever bill of materials (BOM)

37 components, 24 distinct parts.

Qty	Part	Footprint	Refs
1	DRA818	DRA818	U1
1	AP1117-33	SOT-223-3_TabPin2	U3
1	AP1117-50	SOT-223-3_TabPin2	U4
1	MMBT2222	SOT-23	Q1
2	BSS138	SOT-23	Q2, Q3
1	Digital	Socket_Strip_Arduino_1x15	P1
1	Analog	Socket_Strip_Arduino_1x15	P2
4	CONN_01X01	1pin_Nano	P3, P4, P5, P6
1	Antenna	Pin_Header_Straight_1x01_Pitch2.54mm	AE1
1	100k	R_0805	RV1
1	PTT_push_sw	SW_PUSH_6mm_h7.3mm	SW1
1	4.7uf	C_0805	C1
1	.1uf	C_0805	C2
1	1uf	C_0805	C3
2	10uf	C_0805	C4, C5
2	1k	R_0805	R1, R6
1	270	R_0805	R2
1	8.8k	R_0805	R3
1	3.9k	R_0805	R4
1	2.2k	R_0805	R5

Show 4 more

Qty	Part	Footprint	Refs
3	100k	R_0805	R7, R8, R9
4	10k	R_0805	R10, R13, R14, R17
2	3k3	R_0805	R11, R12
2	1k7	R_0805	R15, R16

APRS Transciever design files

The KiCad project lives in the motivemachine/APRS_Transciever repository on GitHub; these links point at the commit this page was built from.

LayoutDRA818nano/DRA818nano.kicad_pcb

APRS Transciever: common questions

How big is the APRS Transciever PCB?

The APRS Transciever measures 17.8 × 43.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the APRS Transciever?

37 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the APRS Transciever design files?

From the motivemachine/APRS_Transciever repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the APRS Transciever design in my own project?

The repository has no license, so all rights stay with motivemachine. Use it as a reference, and ask the author before reusing the design.

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