Using the Fairchild FCM7001 circuit, which is equivalent to the Cal-TexCT7001 chip (which is not very easy to use), can drive six seven-segment LEDs that can be used to display 12-hour or 24-hour and 28/30/31-day calendars. The function of the alarm. The article will give a detailed structural diagram. Pins 3, 5, 10 and 12 of each SN75491 driver chip are connected to pin 11 via a 150 ohm resistor RL.
Advertising machine speaker is a type of speaker which usually using in advertising machine speaker, Lcd TV Speaker, led tv speaker, all-in-one machine speaker,outdoor speaker,used for large advertising players, computer all-in-ones, LCDs TV sets, stereos, smart furniture, toys, mechanical equipment, massage chairs, etc., self-produced and sold, quality assurance.
Advertising machine speaker feature is loud sound, good at mid-range sound and high volumn sound.
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