Electronics Engineering circuit question assignment

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helpimconfused
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I have no idea what to do for this assignment, so any help would be appreciated.
A customer has requested a high voltage meter hardware design, to include a 3-digit LED display, and with the following specification. This circuit is required to fit into an existing electronic system - the customer will build the circuit themselves and write the software if required. There is a 5V 1A supply available within their existing system for powering the new voltmeter circuit:

1. Vin = 0 to 450 Vdc

2. Accuracy +-2 Vdc

PLEASE NOTE THAT THIS IS A DESIGN AND DOCUMENTATION EXERCISE - YOU ARE NOT EXPECTED TO BUILD THIS CIRCUIT OR WRITE ANY CODE.

Produce a report that details your recommended solution. The report should be no more than 5 pages including diagrams and using a number 11 font.

The report should include the following information:

~> An introduction and specification, including the total power dissipated by the circuit (approx. 100-200 words).

~> A fully labelled circuit diagram, including showing all external connections, component values and part numbers.

~> A circuit description (to explain how your circuit works). Include any working out e.g. include any Ohms Law or other calculations that you make.

~> A parts list table including basic component spec, Farnell Components part number, component prices and total price for all circuit components.

~> If your design uses a microcontroller board such as an Arduino or Tweeny, state which IO pins the customer has to or may use, and how they should be set up. E.g. set pin 9 to analogue input and pins 11 to 23 to digital outputs. Assume that the customer will write their own software.

Imagine that you want to impress your customer so that they give you the contract to manufacture these circuits, once the design is approved.

Therefore, the highest marks will be given for the most impressive report and circuit solution. How you do all of this is entirely up to you.

HINTS:

1. Use a potential divider to divide the dangerous voltage down to a safe voltage (we didn't study this, so look it up).

2. An ADC is needed to convert the safe voltage to a digital value (included on most microcontrollers).

3. Assume that a microcontroller e.g. Arduino Nano or Arduino Uno will be used to convert the digital value to BCD values.
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Joinedup
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Report 11 months ago
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(Original post by helpimconfused)
I have no idea what to do for this assignment, so any help would be appreciated.
A customer has requested a high voltage meter hardware design, to include a 3-digit LED display, and with the following specification. This circuit is required to fit into an existing electronic system - the customer will build the circuit themselves and write the software if required. There is a 5V 1A supply available within their existing system for powering the new voltmeter circuit:

1. Vin = 0 to 450 Vdc

2. Accuracy +-2 Vdc

PLEASE NOTE THAT THIS IS A DESIGN AND DOCUMENTATION EXERCISE - YOU ARE NOT EXPECTED TO BUILD THIS CIRCUIT OR WRITE ANY CODE.

Produce a report that details your recommended solution. The report should be no more than 5 pages including diagrams and using a number 11 font.

The report should include the following information:

~> An introduction and specification, including the total power dissipated by the circuit (approx. 100-200 words).

~> A fully labelled circuit diagram, including showing all external connections, component values and part numbers.

~> A circuit description (to explain how your circuit works). Include any working out e.g. include any Ohms Law or other calculations that you make.

~> A parts list table including basic component spec, Farnell Components part number, component prices and total price for all circuit components.

~> If your design uses a microcontroller board such as an Arduino or Tweeny, state which IO pins the customer has to or may use, and how they should be set up. E.g. set pin 9 to analogue input and pins 11 to 23 to digital outputs. Assume that the customer will write their own software.

Imagine that you want to impress your customer so that they give you the contract to manufacture these circuits, once the design is approved.

Therefore, the highest marks will be given for the most impressive report and circuit solution. How you do all of this is entirely up to you.

HINTS:

1. Use a potential divider to divide the dangerous voltage down to a safe voltage (we didn't study this, so look it up).

2. An ADC is needed to convert the safe voltage to a digital value (included on most microcontrollers).

3. Assume that a microcontroller e.g. Arduino Nano or Arduino Uno will be used to convert the digital value to BCD values.
There is lots of information about making an arduino voltmeter on the internet... e.g. https://create.arduino.cc/projecthub...no-nano-ce1f1b
which uses a 10:1 potential divider to extend the normal range of the ADC so that it can measure higher voltages

That project uses LCD display and the spec asks for LED - so you could think about running a display made of 7 segment LED displays (the oldschool way which requires extra driver hardware) or driving an OLED display using an arduino library... as demonstrated by Julian Ilett https://www.youtube.com/watch?v=MHog...?v=MHogSbRPa28
OLED has the extra advantage of letting you display additional symbols to show status information - if the first customer doesn't buy it you could tailor the product to meet some other requirements for a different customer all in software.
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