HardLabs

SDR SSB

kholia·Easy-Transceiver·Easy-uSDX/SDR_SSB.kicad_pcb

SDR SSB PCB layout, top view — open source AVR/Arduino board by kholia

About the SDR SSB PCB

SDR SSB is an open source AVR/Arduino PCB design by kholia, published on GitHub. It is a 2-layer board measuring 85.1 × 71.7 mm, with 70 components from 32 distinct parts.

Its main chip is the ATMEGA328-PU, from the AVR/Arduino family. Other key parts include the LM1117-5.0, LM4562, SN74CB3T3253, SI5351Module and Si5351A. By type, the board carries 28 capacitors, 19 resistors, 6 ICs, 5 inductors, 3 diodes and 2 crystals.

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

From the project

Easy Digital 'FT8' Transceiver. Easy-Transceiver v0.01.

The whole design is modular, parametric (cost and others), field repairable, and super extensible. It is almost trivial to add support for more FSK digital modes.

The Easy-Transceiver hardware works with the native Hybrid FT8 Radio Android app, and also with WSJT-X (running on RPi).

The Easy-Transceiver system can be built for around 3000 INR (~40 USD) or less. We are working on reducing the cost to 2300 INR ;)

SDR SSB, from the project README
From the project README

Main components on the SDR SSB

LM1117-5.0ATMEGA328-PULM4562SN74CB3T3253SI5351ModuleSi5351A

SDR SSB bill of materials (BOM)

70 components, 32 distinct parts.

QtyPartRefs
1
LM1117-5.0
U1
1
ATMEGA328-PU
Microchip Technology
U2
1
LM4562
U4
1
SN74CB3T3253
U5
1
SI5351Module
U6
1
Si5351A
U8
1
20 MHz
Y1
1
25MHz
Y2
1
DC 12v
J1
1
CAT
CAT1
1
AudioJack3_SwitchTR
HEADPHONES1
1
ICSP
ICSP1
1
Display
OLED1
2
SMA
RX1, TX1
1
1N5819
D1
2
1N4148
D2, D3
2
100uH
L1, L2
3
2.2uH
L3, L4, L5
1
100u/16V
C1
12
100nF
C2, C3, C6, C7, C10, C12, C13, C14 +4
Show 12 more
QtyPartRefs
2
10uF
C4, C5
2
2.2nF
C8, C26
1
10uF/16V
C9
2
10nF
C11, C21
2
1nF
C15, C16
4
470nF
C17, C18, C22, C23
2
820
C24, C25
9
10k
R1, R3, R10, R11, R12, R13, R19, R20 +1
3
1k
R2, R26, R27
4
100
R4, R5, R8, R9
2
82k
R6, R7
1
470
R23

SDR SSB design files

The KiCad project lives in the kholia/Easy-Transceiver repository on GitHub; these links point at the commit this page was built from.

SDR SSB: common questions

What microcontroller does the SDR SSB use?

The SDR SSB is built around the ATMEGA328-PU, from the AVR/Arduino family.

How big is the SDR SSB PCB?

The SDR SSB measures 85.1 × 71.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SDR SSB?

70 components, from 32 distinct parts. The full bill of materials is listed on this page.

Where can I download the SDR SSB design files?

From the kholia/Easy-Transceiver repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the SDR SSB design in my own project?

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

Can I test firmware for the SDR SSB without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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