Product condition: New
Descriptions: The MAX7219 is an integrated serial input / output common-cathode display driver that connects a microprocessor with an 8-digit 7-segment digital LED display or a bar graph display or 64 independent LEDs. Which includes an on-chip B-type BCD encoder, multi-scan circuit, segment word drive, but also has a 8 * 8 static RAM used to store each data.Only one external register is used to set the segment current for each LED.A convenient four-wire serial interface can be connected to all common microprocessors.Each data can be addressed at the time of updating without having to rewrite all the displays.The MAX7219 also allows the user to select or not code for each data.The entire device contains a 150μA low power shutdown mode, analog and digital brightness control, a scan limit register allows the user to display 1-8 bits of data, and a test mode for all LEDs to emit light.Only need 3 IO port can drive a dot matrix! Dot matrix display without flicker! Support cascade!Notice:These are the parts, need to be soldered.Module parameters:1. A single module can drive an 8 * 8 common negative lattice2. Module operating voltage: 5V3. Module size: 5 x 3.2 x 1.5 cm (L*W*H)4. With 4 fixed screw holes, aperture 3mm5. Module with input and output interfaces, support multiple modules cascadeWiring instructions:1. The left side of the module is the input port and the right side is the output port.2. When controlling a single module, only need to connect the input port to the CPU3. When multiple modules are cascaded, the input of the first module is connected to the CPU, the output is connected to the input of the second module, the output of the second module is connected to the input of the third module, and so on. ..Take 51 MCU as an example:VCC → 5VGND → GNDDIN → P22CS → P21CLK → P20Precautions:1. VCC and GND can not be reversed, so as not to burn the chip!2. The use of 51 single-chip control of the P0 port, you must connect the pull-up resistor, the recommended resistance is 4.7K - 10K3. Please insert the dot matrix into the round hole, then insert the round hole into the PCB board soldering. The dotted of the word side to your own, the face from left to right pin is 123456. PCB board first foot for the square pad!4. Electrolytic capacitor long pin for the positive, short pin for the negative; ceramic capacitors without positive and negative.Package included : 10 x MAX7219 Dot Matrix Module
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.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.