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FAQ

china_latest_faq_about How to connect a barcode scanner to a computer or mobile phone?

How to connect a barcode scanner to a computer or mobile phone?

August 22, 2025

How to connect a barcode scanner to a computer or mobile phone? The method of connecting a barcode scanner to a computer or mobile phone depends on the device type and transmission protocol. For computer connections, the most common method is USB wired connection. Plug the data cable into the ...
china_latest_faq_about What is the working principle of a barcode scanner?

What is the working principle of a barcode scanner?

July 22, 2025

How Barcode Scanners Work Barcode scanners operate by optically capturing barcode patterns, converting them into digital signals, and decoding the information for data transmission. The working principle varies by scanner type: Laser Barcode Scanners Emit a focused laser beam that sweeps across the ...
china_latest_faq_about How to Connect the Serial Port (VCC, RXD, TXD, GND) of a Barcode Scanner?

How to Connect the Serial Port (VCC, RXD, TXD, GND) of a Barcode Scanner?

July 21, 2025

Barcode Scanner Serial Port Connection (RXD, TXD, VCC, GND) Guide The serial cable of a barcode scanner contains four critical pins: RXD (Receive Data), TXD (Transmit Data), VCC (Power Positive), and GND (Ground). Connection strategies must be adjusted according to the target device type: Connection ...
china_latest_faq_about What is the scanning depth of field of a barcode scanner?

What is the scanning depth of field of a barcode scanner?

July 19, 2025

Scanning Depth of Field (DOF) of a Barcode Scanning Module The scanning depth of field (DOF) of a barcode scanning module refers to the effective distance range within which it can clearly and accurately recognize barcodes or QR codes. Beyond this range, image blurring may cause recognition failure. ...
china_latest_faq_about What are the exposure methods of barcode scanners, and what are their different characteristics?

What are the exposure methods of barcode scanners, and what are their different characteristics?

July 18, 2025

Rolling Shutter Exposure:The sensor activates exposure row by row, progressing sequentially from the top to the bottom of the image, similar to a rolling curtain descending. Each row of pixels has a slightly different start and end time for exposure, resulting in a minor time discrepancy. Most CMOS ...
china_latest_faq_about Frequently Asked Questions

Frequently Asked Questions

June 25, 2025

FAQ Q:Can you send sample? A:Yes, YJFIRST welcomes sample order to test. Please contact us for more details before placing sample order. Q:Can we have our logo or company name to be printed on the product or package? A:Yes, printer with logo or company name is acceptable, it will be accomplished by ...