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Basic Transistor Circuits - PCB Heaven
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日期：2025-09-29
The output from a 74LS series TTL IC is required to operate a relay with a 160 Ohm coil. The supply voltage is 12V for the transistor and 5V for the IC. The IC can supply a maximum current of 2mA. I L = Vs / R L => I L = 12 / 160 = 75mA The transistor mus...看更多
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