• on RF (radio)
  • Published in issue 7/2016 on page 54
About the article

Elektor SDR Reloaded (1)

SDR Shield for the Arduino

Elektor SDR Reloaded (1)
A Software Defined Radio is a universal tool in RF technology circles, one that can also be put to use for making measurements. The characteristics of the receiver are defined in software, which now gives us the opportunity to use an Arduino Shield as a front-end.
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Extra info, Update
Supply voltage: 5 V and 3.3 V as for Arduino Frequency range: 150 kHz up to 30 MHz Sensitivity: 1 µV Total amplification: 40 dB Maximum antenna signal level: 10 mV Dynamic range: 80 dB
Component List
Resistors
R1,R2,R13,R18 = 4.7kOhm 1%, 0.1W, SMD 0603
R3,R4 = 330Ohm 1%, 0.1W, SMD 0603
R5,R7,R8 = 100Ohm 1%, 0.1W, SMD 0603
R6 = 470 Ohm 1%, 0.1W, SMD 0603
R9,R11,R14,R16 = 10kOhm 1%, 0.1W, SMD 0603
R10,R12,R15,R17 = 100kOhm, 0.1W, SMD 0603
Capacitors
C1,C18 = 4.7µF 16V, SMD case B
C2,C3,C6,C7,C8,C9,C12,C13,C14,C15,C16,C17,C19 = 100nF 50V, X7R, SMD 0603
C4,C5,C10,C11 = 2.2nF 50V, X7R, SMD 0603
Inductors
L1 = 2200µH (Fastron L-1812AF)
L2 = 100µH (Murata LQH32CN101K23L)
Semiconductors
D1,D2 = 1N4148WS, SOD-323
T1 = BF545B, SOT-23
IC1 = SI5351A-B-GT, MSOP-10
IC2 = SN74AC74PW, TSSOP-14
IC3 = 74HC4066, SOIC-14
IC4 = TI914IDT, SOIC-14
Miscellaneous
K1 = stereo jack socket, 3.5mm, PCB mount
K2,K3,K4,K5 = connector set, Arduino compatible (1 pc. 6-pin, 2 pcs. 8-pin, 1 pc. 10-pin)
X1 = 25MHz quartz crystal (Abracon ABM7)
PCB # 150515-1
Or
PCB with preassembled SMD parts: 150515-91
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