Introduction: Light-emitting diode MATRIX SHIELD 13x15

Today I would like to share how to pretend a small 13x15 led matrix shield connected the PCB prototype 5x7cm. This shield can be obstructed on the Arduino MEGA, Arduino UNO and WeMos D1 UNO. We can customise the brightness although the leds have one color.

Let's get started.

Sand falling effect with Arduino Mega 2560:

Internet Time with Wemos D1 R2:

Footmark 1: PARTS Lean

Main parts include

  • 200pcs x LED 3mm, blue color in my sheath.
  • 02pcs X 7X9cm Forked Broadside DIY PROTOBOARD CIRCUIT.
  • 01pcs x Arduino UNO or MEGA 2560 or Wemos D1 R2.
  • 01pcs x 4-TO-16 Decipherer/DEMUX CD74HC154E.
  • 02pcs x POWER LOGIC 8-BIT Tilt REGISTER TPIC6B595N.
  • 16pcs x Transistor A1013
  • 16pcs x R100
  • 16pcs x R1K
  • 02pcs x Capacitor 1uF
  • 2pcs x Female 40pin 2.54mm Header.
  • 2pcs x Male 40pin 2.54mm Header.
  • 01meter x 8P Rainbow Ribbon Cable.

Pace 2: SCHEMATIC

Circuit diagram as shown in a higher place picture or you can download high resolution PDF file Hither.

The columns are connected to the LEDs cathodes, so a column necessarily to be LOW for any of the LEDs therein column to turn on. The columns are obsessed away high-level power shift register TPIC6B595N that they are high business leader drains, able to sink 150mA per pin. The TPIC6B595N cannot source current so they should be connected to LED cathodes.
The rows are connected to the LEDs anodes, soh the row of necessity to Be HIGH for an somebody LED to turn on. The rows are controlled by NPN transistors A1013 with utmost collector current about 1A. If the row and column are either HIGH or LOW, atomic number 102 voltage flows through the LED and information technology doesn't turn on.

Step 3: SOLDERING LED Intercellular substance 13x15

  • Arrange the first run-in of leds

  • To be able to align the LED, we only solder unrivalled pin of led - anode PIN number in my case. If the led is deflected, we put on the soldering head at its anode pin until the lead is run and get along alliance at this moment. We should shortened led pins short enough and ensure each rows/ columns to represent soldered together without any extension wires.

  • Soldering one anode pins and abbreviate led pins for all odd leds. Now we start soldering 13 cathode pins of leds in the starting time row together. We undergo all 15 rows and each wrangle has 13 leds.

  • For the first row of LEDs, we just bend them and later they bequeath atomic number 4 soldered to the male coping and connected to transistor A1013. The irregular row will be bended and soldered to the first rowing. We just come after the order from outside to inside and solder the columns first, then after solder the rows. Note, aft each row and column is realised, we should check the leds to experience whether they are crushed or short-circuited / open-circuited.

  • Note that we should solder with a enough sum of money of contribute at the anode of led. And later when we twist anode trap, they testament personify folded at top of this soldering point and there is a small opening with the cathode pivot.

  • Bonding male headers for rows and columns. Led matrix is DONE.

Step 4: SOLDERING CONTROL Arranger BOARD

  • Bonding the control circuit following the diagram as following picture.
  • Control Display panel - TOP VIEW

  • Master Board - BOTTOM See

  • To round control board and led matrix into a shield, we solder the headers on controller adapter as follows:

- Female cope at top is connect to row and columns of led matrix board.

- Male head at bottom is connected to Arduino Uno/ Mega 2560.

- Female header at middle is connect to 6 PIN ICSP connector of Arduino Uno/ Mega 2560.

  • Conjunctive Led Matrix, Control Adapter and Arduino UNO/ MEGA together

  • DONE.

  • We can apply a phone battery charger to power this led intercellular substance shield and Arduino or cater the power at green be intimate header along control adapter board.

  • For WeMos D1 R2, information technology doesn't take over ICSP lintel connected panel therefore we had to solder 2 fall-header at pin D5 - DATA and pin D7 - CLOCK.

  • And we can add MPU6050 on the control board.

  • Covering by a limited box

  • At back side of box, we drill 6 holes to ensure that UNO/ MEGA/ WEMOS can be mounted by these holes. Picture below I used WeMos to control this led matrix.

Step 5: Computer programming

The code is availabe in my GitHub:

https://github.com/tuenhidiy/MATRIX-SHIELD-13x15

This is sand falling effect testing and it is controlled by Arduino Mega 2560.

Step 6: FINISH

Thank for your watching!

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