All posts by admin

Fuel Totaliser Specification


Need to measure the amount of fuel used using an accurate flow meter and display this inside the car.

  • Flow meter has a reed switch output for a given flow, which is 200 pulses = 1 litre
  • ¬†Measure up to 100 litres, so need to count 20,000 pulses
  • Display the current consumption total on an in car display to 1 decimal place
  • When refuelling, need to be able to reset the total by a push button held down for approx. 3 seconds.
  • The count needs to be non-volatile if power is lost.
  • Upload the total to an FTP site / HTTP POST site with a configurable frequency (approx. 1-10 times per minute) – (either dedicated MiFi or phone hotspot)
  • Future requirement : output a voltage level depending on current total so this can be fed into an external data logger


  • Pulse from flow meter, 200 pulses = 1 litre
  • Push button – 3 second push to reset count


  • Total litres used on display (BIG FONT)
  • Total pulses (SMALL FONT) (If using LCD)
  • Write current total/pulses/time to file
  • Upload total litres/pulses/time to FTP/HTTP site
  • Voltage output – level depending on litre total


  • Rasberry Pi as compute device
  • Andriod as compute device
  • Phidget VINT hub as input/output interface
  • Phidget Graphic LCD for ‘posh’ out – allows more scope for future?
  • 7 segment LCD display – cheaper option – could be clearer in car?
  • Andriod option such as Samsumng Note would have power/display – could use on-the-go usb interface to VINT hub?
  • phyton option for Rasberry
  • java option for Andriod


Flow Meter details…-1-50-max-80-litre-hr–1.html?category_id=75

Future Data Logger connections

Discret Components

Raspberry Pi GPIO Explained

Raspberry Pi: Launch Python Script on Startup

Rasberry Pi emulator

Controlling a 7 segment 4 digit display with a Raspberry Pi

How To Autorun A Python Script On Raspberry Pi Boot

How to drive a 7 segment display directly on Raspberry Pi in Python

Official Raspberry Pi 7″ Touchscreen Display

Connecting a Push Switch

Run Phidgets on the Raspberry Pi

Connect Phidgets to Raspberry Pi

Extenal 3g antenna|pcrid|74629370918390|kword||match||plid||pid|RF00569|&CMP=KNC-MUK-CPC-SHOPPING&msclkid=588707fc94d81ebffc1c5cdb5c75f7f5&utm_source=bing&utm_medium=cpc&utm_campaign=M-440-Shopping-Electrical%20and%20Lighting&utm_term=4578228982951501&utm_content=Wireless%20Systems

Nano > normal sim adapter

Overview of Azure Service Fabric

Azure Service Fabric is a distributed systems platform that makes it easy to package, deploy, and manage scalable and reliable microservices and containers. Service Fabric also addresses the significant challenges in developing and managing cloud native applications. Developers and administrators can avoid complex infrastructure problems and focus on implementing mission-critical, demanding workloads that are scalable, reliable, and manageable. Service Fabric represents the next-generation platform for building and managing these enterprise-class, tier-1, cloud-scale applications running in containers.

Follow this link for more information.