現(xiàn)有基于MAX7219芯片的數(shù)碼管驅(qū)動電路只適用于小尺寸LED,為擴(kuò)展其使用范圍,在介紹動態(tài)顯示芯片MAX7219功能的基礎(chǔ)上,提出了一個基于該芯片的8位高亮度8英寸數(shù)碼管驅(qū)動電路。電路保留了MAX7219芯片的功能強(qiáng)大、編程簡單等優(yōu)點(diǎn),通過74LS273鎖存器和ULN2803達(dá)林頓驅(qū)動器,實(shí)現(xiàn)了對任意大尺寸數(shù)碼管提供較高電壓和電流驅(qū)動的靜態(tài)顯示,并亮度可調(diào)。
Abstract:
The existing display-driving circuit based on MAX7219 was only applicable to small-size LED. To expand its use, based on the function introduction of dynamic display chip MAX7219, a display-driving circuit for high-brightness 8-bit LED with the size of 8-inch was proposed. The advantages of MAX7219 were retained, such as powerful function and simple programming. Static display with adjustable brightness for large-size LED with higher voltage and current was achieved with the help of 74LS273 and ULN2803.
標(biāo)簽:
7219
MAX
LED
數(shù)碼顯示
上傳時(shí)間:
2013-10-23
上傳用戶:31633073