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  1. keystrike

    negative to positive level shifting

    Ok here we go, for very complicated reasons I don't want to explain, here is my setup: I have a 68hc12 that needs to talk to a digital resistor chip over SPI. Microcontroller: Gnd: 0V Vcc: 5V dig resistor : Gnd: -5V Vcc: 0V So as you can see I need to level shift into the negative voltage...

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