Fabrication of soil sensors - hydrogeologger/pyduino GitHub Wiki

SUCTION SENSOR

Part requirements

  1. suction sensor PCB

suction pcb

  1. a temperature sensor ds18b20
  2. a resistor (13ohm) and a capacitor (1uF)
  3. a two-pair cable
  4. brass tube
  5. epoxy
  6. ceramic cylinder
  7. glue core heat shrink tubes (diameter:16mm) and heat gun

Instruction

  1. place a resistor on R3 and solder it under a microscope
  2. place temperature sensor on U1 and solder it

res and temp

  1. place capacitor on C1 and solder it

cap

  1. soldering red and white wires to soldering pad V (power) and D (data), respectively; soldering green and black wires to soldering pad H (heating+) and G (ground), respectively

wiring - V D wiring - H G wire1 wire2