HardLabs

IQ SDR

frohro·IQ_SDR·Receiver/IQ_SDR/IQ_SDR.kicad_pcb

IQ SDR PCB layout, top view — open source AVR/Arduino board by frohro
Simulate this board

About the IQ SDR PCB

IQ SDR is an open source AVR/Arduino PCB design by frohro, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 96 components from 62 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. Other key parts include the FST3253, Si5351A-B-GT, TS5A23157, LM4562 or LT6231 and 74ALVC74D. By type, the board carries 32 capacitors, 23 connectors, 16 resistors, 12 inductors, 5 ICs and 2 jumpers.

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

From the project

Quadrature Sampling SDR

Main components on the IQ SDR

FST3253Si5351A-B-GTTS5A23157LM4562 or LT623174ALVC74DArduino_Nano_v3.x

IQ SDR bill of materials (BOM)

96 components, 62 distinct parts.

QtyPartRefs
1
FST3253
U1
1
Si5351A-B-GT
U2
1
TS5A23157
U3
1
LM4562 or LT6231
U4
1
74ALVC74D
U5
1
Arduino_Nano_v3.x
A1
1
MMBT2222A-TP
Q1
1
CX3225
Y1
1
SJ1-3523N
CON1
1
ANT
J1
2
GND
J2, J4
1
V_IN pin header
J3
1
V_IN
J5
1
FIL_O
J6
1
CLK1
J7
1
CLK2
J8
1
CLK0
J9
1
LO_I
J10
1
LO_Q
J11
1
GNDA
J12
Show 42 more
QtyPartRefs
1
I_IN
J13
1
Q_IN
J14
1
+5V
J15
1
4.3V
J16
1
I_OUT
J17
1
Q_OUT
J18
2
Conn_01x01_Male
J19, J20
1
BNC
P1
1
SMA
P2
1
smooth disable
JP1
1
Jumper_3_Bridged12
JP2
1
Transformer_1P_SS
T1
2
1N914
D1, D2
2
1uH
L1, L11
1
2.4uH
L2
2
232nH
L3, L9
2
497nH
L4, L10
1
1.137uH
L5
1
1.98uH
L6
1
4uH
L7
1
7.2uH
L8
1
2.6uH
L12
3
0.01
C1, C18, C19
2
820pF
C2, C13
10
0.1uF
C3, C15, C16, C17, C20, C21, C22, C25 +2
2
1.5nF
C4, C14
2
220pF
C5, C11
2
390pF
C6, C12
1
47pF
C7
1
100pF
C8
1
180pF
C9
1
470pF
C10
5
10uF
C23, C24, C29, C30, C31
2
2200pF
C26, C27
3
2.2k
R1, R6, R7
2
10k
R2, R4
2
5.6k
R3, R5
1
1k
R8
2
10
R9, R10
2
1.0k
R11, R12
2
100
R13, R14
2
4.7k
R15, R16

IQ SDR design files

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

IQ SDR: common questions

What microcontroller does the IQ SDR use?

The IQ SDR is built around the Arduino_Nano_v3.x, from the AVR/Arduino family.

How big is the IQ SDR PCB?

The IQ SDR measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the IQ SDR?

96 components, from 62 distinct parts. The full bill of materials is listed on this page.

Where can I download the IQ SDR design files?

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

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

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

Can I test firmware for the IQ SDR 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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