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STD Soil Sense Mark 1

License: Public Domain

Mode: Editors' pick

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Update time: 2018-12-25 23:14:41
Creation time: 2018-12-25 23:10:35
Description
Oscillator used to measure soil moisture Probe is connected to LC tank and modelled as a transmission line However EasyEDA does not support spice simulation of transmission lines. Instead can simulate this circuit in LTSpice by exporting the netlist
Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity Mounted
1 1k R1,R5 AXIAL-0.3 2 Yes
2 1n C2 RAD-0.1 1 Yes
3 10k R2,R6,R7,R14 AXIAL-0.3 4 Yes
4 1G R4,R15 AXIAL-0.3 2 Yes
5 100m R12 AXIAL-0.3 1 Yes
6 BC547B Q3,Q4 SOT23 2 Yes
7 PULSE(0 5 0 1u ) AC 1 0 V13 HDR1X2 1 Yes
8 100n C11 RAD-0.1 1 Yes
9 0.1u L3 AXIAL-0.4 1 Yes
10 1p C12 RAD-0.1 1 Yes
11 22p C13,C14 RAD-0.1 2 Yes
12 LTRA_length O1 NONE 1 Yes
13 LTRA_length2 O2 NONE 1 Yes

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