„Capacitors” változatai közötti eltérés
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1:16 | 1:16 | ||
If you set it as an '''output mode''', then you're driving-- what you then be looking at, really? | If you set it as an '''output mode''', then you're driving-- what you then be looking at, really? | ||
PROFESSOR 2: '''Very low resistance.''' | PROFESSOR 2: '''Very low resistance.''' | ||
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1:32 PROFESSOR 2: OK, so when we're actually setting the pins, in the code, | 1:32 PROFESSOR 2: OK, so when we're actually setting the pins, in the code, | ||
to be inputs or outputs, we're actually changing the impedance that's the pin. | to be inputs or outputs, we're actually changing the impedance that's the pin. | ||
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1:46 Yeah, I was connecting the supply wire to the capacitor, | 1:46 Yeah, I was connecting the supply wire to the capacitor, | ||
pulling it off by hand. | pulling it off by hand. | ||
Pulling it off by hand is like putting a really high impedance there | Pulling it off by hand is like putting a really high impedance there | ||
between those. | between those. | ||
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[https://courses.edx.org/courses/course-v1:BerkeleyX+EE40LX+2T2015/courseware/2c7d2b788bc34067875d416e54c53949/65f13e44250b4b49a559872cb56d8cae/ BerkeleyX+EE40LX+2T2015/] | [https://courses.edx.org/courses/course-v1:BerkeleyX+EE40LX+2T2015/courseware/2c7d2b788bc34067875d416e54c53949/65f13e44250b4b49a559872cb56d8cae/ BerkeleyX+EE40LX+2T2015/] | ||
A lap 2017. március 12., 14:49-kori változata
Kondenzátorok
Tri-stating
<videoflash>1VacYW69NMA</videoflash>
1:05
when you set a pin to input, you want that to be a very high resistance, right? What's the input impedance of an amplifier?
PROFESSOR 2: Very high.
1:16 If you set it as an output mode, then you're driving-- what you then be looking at, really? PROFESSOR 2: Very low resistance.
1:32 PROFESSOR 2: OK, so when we're actually setting the pins, in the code,
to be inputs or outputs, we're actually changing the impedance that's the pin.
1:46 Yeah, I was connecting the supply wire to the capacitor,
pulling it off by hand.
Pulling it off by hand is like putting a really high impedance there
between those.