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audioguru said:Only two cheap resistors make a voltage divider.
?audioguru said:A single resistor can feed 30V logic to a 5V Cmos logic IC.
A Cmos logic IC has protective diodes at its inputs to prevent damage from static electricity. The diodes limit the input voltage to slightly above its supply voltage and to slightly below ground. If a single resistor is used to limit the current into the protective diodes then any high voltage input can be used.aiva said:In more detail, please
aiva said:Ok.
But how to increase 5 V up to 30V when transmitting?