the digital clock circuit


Posted on Feb 6, 2014

U1 is a 3817 integrated circuit, which is produced by Fairchild Corp. It can directly drive the display, and it can display for 12h or 24h, It can generate the clock sound and turn on the radios on time. The display is a FND500 LED, the input frequency can be 50Hz or 60hz. U2 is a 7800 voltage stabilizer whose regulated power can meet all radio users` need..


the digital clock circuit
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