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STD LoRa inductive cyble water meter sensor
License: CC BY-NC-SA 3.0
Mode: Editors' pick
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Update time：
2024-02-25 15:38:21
Creation time：
2023-01-09 18:34:40
Description
This is a sensor to put onto a water meter having a rotating metallic disc called "cyble". It detect the oscillation weakening when the inductor is in the front of the metallic part. LoRa module transmit measure values.
Firmware is an example of working. It must be adapted to the shape of the cyble (half disc, third disc) and to the LoRa packet to transmit.
Design explanations could be found here :
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 100pF | C1,C7,C9 | C0805 | 3 |
| 2 | 100nF | C2,C3,C4,C5,C11,C13 | C0805 | 6 |
| 3 | 2.2nF | C6,C8 | C0805 | 2 |
| 4 | 10uF | C10 | CASE-A_3216 | 1 |
| 5 | 22uF | C12 | C0805 | 1 |
| 6 | SS14 | D1,D2 | SMA_L4.2-W2.6-LS5.3-RD | 2 |
| 7 | AVR_ISP_INLINE | ISP1 | AVRISP_INLINE_SMD | 1 |
| 8 | SERIAL | J1 | HDR-M-2.54_1X4 | 1 |
| 9 | 1mH | L1,L2 | L-05HCP | 2 |
| 10 | LED | LED1 | LED0805_RED | 1 |
| 11 | MODE | PUSH | KEY-SMD_4P-L6.0-W6.0-P4.50 | 1 |
| 12 | 470 | R1,R3,R6,R8 | R0805 | 4 |
| 13 | 470k | R2,R5,R7,R9,R12,R14 | R0805 | 6 |
| 14 | 100k | R4 | R0805 | 1 |
| 15 | 1k | R10,R13 | R0805 | 2 |
| 16 | 47k | R11 | R0805 | 1 |
| 17 | 10k | R15,R16 | R0805 | 2 |
| 18 | ATMEGA328P-AU | U1 | TQFP-32_L7.0-W7.0-P0.80-LS9.0-BL | 1 |
| 19 | LM4040AIM3X-2.5 | U2 | SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR | 1 |
| 20 | SX1278 - RA01 | U3 | WIRELM-SMD_M-SX1278S2 | 1 |
| 21 | JST-XH-02-PIN | X1 | JST-XH-02-PACKAGE-LONG-PAD | 1 |
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