Material: PCB + Electronic Components.
Size: 82 * 15 * 18mm.
Wiring instructions (a program, for example, you can pick any IO port definition can be modified in the program).
VCC → 5V.
GND → GND.
DIN → P00.
CS → P01.
CLK → P02.
VCC and GND Do not reversed, it would burn the chip.
51 MCU P0 port requires pull-up resistor, if your device does not have a pull-up resistor can be connected to other ports data lines.
1 x MAX7219 CWG 8-Digit Digital Tube Display TM1638 Control Module Red for Arduino
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
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