Free shipping 2PCS USB current and voltage tester USB voltage ammeter USB current and voltage tester dual table display

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Free shipping 2PCS USB current and voltage tester USB voltage ammeter USB current and voltage tester
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Availability: in stock
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Price:  $ 18.99 / lot
Sale price:  $ 17.85 / lot

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Guarantees: On-time Delivery 60 days


***Welcome to our store*** Use search , find your parts you need , or contact us though if u can not find the chips u want, pls feel free to contact me! we also have IC pls contact us skype: kent_xin The MAX7219 is an integrated serial input / output common-cathode display driver that connects the microprocessor to an 8-digit, 7-segment digital LED display, and can be connected to a bargraph display or 64 individual LEDs. It includes an on-chip BCD encoder, multiplex scan loop, segment driver, and an 8 x 8 static RAM 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 without updating all the displays. The MAX7219 also allows the user to select or not encode each data selection. The entire device includes a 150μA low power shutdown mode, analog and digital brightness control, a scan limit register allows the user to display 1-8 data, there is a let all LED light detection mode. Only need 3 IO mouth can drive 1 dot matrix! Dot matrix display without flicker! Support cascade! Module parameters: 1. A single module can drive an 8 * 8 common negative lattice 2. Module operating voltage: 5V 3. Module size: length 12.8 cm x width 3.2 cm x height of 1.3 cm 4. With 64 fixed screw holes, aperture 3mm 5. Module with input and output interfaces, support multiple modules cascade Wiring 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, simply connect the input port to the CPU 3. 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. … To 51 single-chip as an example: VCC → 5V GND → GND DIN → P2.2 CS? P2.1 CLK? P2.0 Shipping list: 1.MAX7219 dot matrix module four in one (finished, with dot matrix, has been tested) 2.20CM DuPont line 5P Warranty 1.- One year guarantee. 2.- If the item is defective upon receipt, it should be within 7days from the date of receipt for exchange a new one (Buyer should return all original and undamaged items under re-saleable condition). 3.- We supply free repairing service within one year of purchase. For the first 1 month, we will pay one way shipping cost( from us to your location); After 1 month of purchase, the buyer need to pay two ways of shipping cost. 4.- One we get the returned items, we will send the replaced ones back as soon as possible. 5.- Our warranty does not extend to any products that are physically damaged or under un-normal operating conditions as a result of misuse or improper installation on the parts. Payment 1.- Please make sure your payment account is available before you bid the item. 2.- All payments should be cleared within 7days after you receive the item. If you really have difficulty in paying the item, please contact us firstly, we will help to solve it. 3.- If you have any special request about the details of item, please leave a note in your order. Shipment 1.- We can ship the products all the world. 2.- DHL, FedEx, TNT, UPS, EMS, China Post, Hongkong Post are all available. 3.- The item will be sent out with 3days after receiving the payment. 4.- Please make sure your delivery address and contact telephone number are correct when you bid the item. 5.- You can track the situation of your product on website after they are shipped out. Import Taxes or Duties 1.- Import duties, taxes and other charges happened in your side are not included in the price of the item. These fees are afforded by buyer. 2.- Please check with you country?s Customs office to determine what these additional costs will be before purchase. 3.- Please confirmed detailed information about delivery invoice. For example, how much price we should write on the waybill invoice, or how to describe the item, etc… Feedback 1.- As your feedback is very important to our development, we sincerely invite you to leave positive feedback for us if you are satisfied with our product and service. Thanks a lot for your time. 2.- Our program will leave back the same feedback to you after your positive feedback. 3.- Please contact us before you leave a neutral or negative feedback, we will try our best to solve the problems. Thank you very much for your support and wish you have a nice day!

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Shipping Company Shipping Cost Estimated Delivery Time
DHL 3 - 7 days
UPS Expedited 3 - 7 days
EMS 5 - 14 days
Post Air Mail Free Shipping 15 - 45 days
Return Policy If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).
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