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Remote contact less water level meter – a need of the hour

Status: Proposal
4545
7
votes
June 3, 2015
PUBLISHED
in Elektor magazine | March 2018 | Find it here
remote_level.png

Accuracy of measurement: (8 readings per second and averages )

Ultrasonic ranging module HC - SR04 provides 20 mm – 5000 mm non-contact measurement facility, the ranging accuracy is 3 mm and aperture angle is 15 Degree. 

Component list & price:

  • ATMEGA328 based Arduino pro mini – 2 nos: $4
  • HC-SR04 Ultrasonic probe – 1 no: $1
  • LCD Hitachi – 2*16 char – 1 no: $2.8
  • 433 MHz Tx & Rx – 1 set with antenna : $2 to $4
  • 5 volt 2 ampere power supply unit – 2 set: $8 to $10


All the above price list are based on aliexpress.com.

Principles of operation:

It checks the code word first and then displays the level. If the remote Tx fails it indicates on the remote unit. The free GPIOs can be used for running the relays / contactors for running / stopping pumps.

Trouble Shooting:

Check for connections and voltage level at various stages.

Bye, bye

S. Bera

Vindhyanagar
 

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Images
Remote Transmitter
Remote Transmitter
Remote Receiver
Prototype Receiver
Schematics
Software

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