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Multiflexmeter
Automated groundwater conductivity readout based CN0359
| Reference | Value | Description |
|---|---|---|
| Q1 | BSS138 | |
| U1 | STM32L071CBTx | |
| U2 | TPS631000DRLR | |
| U3 | ADP5070ACPZ | |
| U4 | SPX3819M5-L-5-0 | |
| U5-U8 | PCAL6524HEAZ | |
| U9-U32 | ADG6412BCPZ | |
| U33 |
| U34 | USBLC6-2SC6 |
|---|
| U35,U36 | 74LVC1G125GW | Single Buffer Gate Tri-State, Low-Voltage CMOS |
|---|
| U37 | SP3485EN | Industrial 3.3V Low Power Half-Duplex RS-485 Transceiver 10Mbps, SOIC-8 |
|---|
| C1,C5,C14-C70,C72,C74-C79,C82-C112 | 100n |
|---|
| C2,C3 | 22p |
|---|
| C4,C7-C9 | 10u |
|---|
| C6 | 47u |
|---|
| C10,C11 | 47n |
|---|
| C12,C13,C81 | 1u |
|---|
| C71,C73 | 4u7 |
|---|
| C80 | 10n |
|---|
| D1-D28 | WS2812B |
|---|
| D29,D30 | DFLS240 |
|---|
| D31 | SM712 | 7V/12V, 400W Asymmetrical TVS Diode Array, SOT-23 |
|---|
| H1-H4 | Hole |
|---|
| J1 | Output connector |
|---|
| J2 | SWD Pin Header |
|---|
| J3 | SWD-TagConnect |
|---|
| J4 | I2C control port |
|---|
| J5 | Zoutwachter cable |
|---|
| J6 | USB-C Connector |
|---|
| J7 | 1373889 |
|---|
| J8 | RS-485 port |
|---|
| JP1 | SolderJumper_2_Open |
|---|
| JP2 | LED_IN_ENABLE |
|---|
| JP3 | LED_OUT_ENABLE |
|---|
| JP4 | Power source Host |
|---|
| JP5 | Power source USB/Host |
|---|
| L1 | 1uH 1.6A |
|---|
| L2,L3 | 4u7H |
|---|
| R1,R2,R19,R20,R122,R123 | 4k7 |
|---|
| R3-R5,R117,R118,R121 | 10k |
|---|
| R6 | 511k |
|---|
| R7 | 2M43 |
|---|
| R8 | 91k |
|---|
| R9 | 137k |
|---|
| R10 | 25k |
|---|
| R11 | 18k |
|---|
| R12 | 2M32 |
|---|
| R13 | 118k |
|---|
| R14,R15 | 5k1 |
|---|
| R16 | 22k |
|---|
| R17 | 47k |
|---|
| R18 | 1k |
|---|
| R21-R116 | 330 |
|---|
| R124 | 120R | Resistor, small symbol |
|---|
| SW1 | RESET |
|---|
| Y1 | 8MHz |
|---|