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  1. moe2k3

    cmos - ttl problem

    I have to connect this temperature sensor to the PCs parallel port. So I connect the sensor to adc0804, which I think is CMOS based. Next I need to connect the 8 bits to the PCs parallel port. So I use 2 quad bus buffers, 74125. The buffer is ttl-based. The pc's parallel port considers 5V as on...

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