Design a small electronic circuit to drive an LED matrix.

Status: Closed
Prize: $50
Entries Received: 6
Winner: yousufhusain434

Winner

Contest Brief

You just need to draw the circuit.
The circuit needs to drive 60 LEDs which are arranged like in the attached picture:
Four times 3 x 5 matrixes to display numbers.
The LEDs will have a flow voltage of 2.8-3.5V.
The whole matrix display with the 60 LEDs will be connected to a micro controller through max. eight wires total.
Design the driving circuit. It should be cheap and all components need to be available at both: digikey.com and mouser.com.
Add a little bill of material with the order numbers.
If possible, draw the circuit with Autodesk Eagle.
The best circuit wins.

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Top entries from this contest

yousufhusain434 Bangladesh

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lazeeez100100 Egypt

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lohug Mexico

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Public Clarification Board

lazeeez100100
- 5 years ago
you told us "You just need to draw the circuit"
- 5 years ago
1. lazeeez100100
  - 5 years ago
  me must be the winner
  - 5 years ago
2. lazeeez100100
  - 5 years ago
  this not fair
  - 5 years ago
SK Technology Pvt Ltd
- 5 years ago
#increaseprize and then pls invite me
- 5 years ago
Contest Holder
- 5 years ago
The IC IS31FL3736 seems to be the best solution for my needs. Can anybody draw a nice and correct schematic in Eagle, with all the components in some libraries? A component consists of a symbol, a footprint and a pinout table. Thank you! This schematic will win.
- 5 years ago
Contest Holder
- 5 years ago
It will be an 8 MHz, 8 bit processor. GPIOs, SPI, I2C are available.
- 5 years ago
lohug
- 5 years ago
whats the clock speed of the microcontroller you are using?, or can I have the full name of it? thank you
- 5 years ago
Contest Holder
- 5 years ago
Dear everybody, I am out of the office for a few days and might not be able to connect to the internet all the time. I will get back to this competition in a week, latest. Thank you.
- 5 years ago
JaimeAlbq
- 5 years ago
Which size do you want this PCB? How much do you want to spend on it? The LED should be SMD or THT, and which size of them?
- 5 years ago
1. Contest Holder
  - 5 years ago
  You don't need to create a PCB. Just the schematic.
  - 5 years ago
Capa1T
- 5 years ago
LEDs' Anodes are connected to columns or rows of matrix?
- 5 years ago
1. Contest Holder
  - 5 years ago
  However you want. The LEDs will be populated on a PCB, I won't take a matrix LED module.
  - 5 years ago
lohug
- 5 years ago
if im using an ATMEL microproccessor should the programmer be included in the bill of materials?
- 5 years ago
1. Contest Holder
  - 5 years ago
  No. Actually, there will be a micro controller on another PCB. It will drive the LED matrix board through max. eight wires as mentioned in the description. Less wires would be better, but that also depends on the price of the other components.
  - 5 years ago
khanjzthanjzt
- 5 years ago
End product you need should be?
- 5 years ago
1. Contest Holder
  - 5 years ago
  This is for a machine, to display numbers and simple messages. Thank you.
  - 5 years ago