witam tłumaczę sobie tekst o trnsoptorach a że mój techniczny angielski nie jest na najwyższym poziomie więc mam pewne problemy mianowicie:
For example just like a discrete LED, you can drive an optocoupler.s input LED from a transistor or logic gate/buffer. All that.s needed is a series resistor to set the current level when the LED is turned on. And regardless of whether you use a transistor or logic buffer to drive the LED, you still have the option of driving it in .PULL DOWN. or PULL UP. mode.This means you can arrange for the LED, and hence the optocoupler, to be either on or off for a logic high (or low) in the driving circuitry.
własnie jak przetłumaczyć PULL UP i PULL DOWN??? włączanie i wyłączanie??
pozdrawiam