Max7219 Dot Matrix Display - 4 In 1 Integrated Display, Scm Control Drive,, 5V Product parameter Product Features MAX7219 is an integrated serial input/output common cathode display driver. It connects the microprocessor with 8-digit 7-segment digital LED display, and can also connect the bar graph display or 64 independent LEDs. The MAX7219 includes an on-chip B-type BCD encoder, a multiple-scan circuit, a segment word driver, and an 8 * 8 static RAM to store each data. Only one external register is used to set the segment current of each LED A convenient four-wire serial interface can connect all general-purpose microprocessors. Each data can be addressed, and there is no need to overwrite all displays when updating. MAX7219 also allows users to choose whether to encode or not to encode each data The whole equipment includes a 150 ?A low-power off mode, analog and digital brightness control, a scan limit register allows users to display 1-8 bits of data, and a detection mode that allows all LEDs to glow Only three IO ports are needed to drive one dot matrix. There is no flicker when the dot matrix is displayed. Support cascading Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!