C
Captain Dondo
- Jan 1, 1970
- 0
OK, I have a real basic question....
I have an embedded computer. It had digital I/O. Per the manufacturer,
"When the DIO pins are configured as outputs, they can source 4 mA or
sink 8 mA and have logic swings between 3.3V and ground."
OK, I prefer to work as source. So... How do I get 4 ma @ 3.3V to
control a 5V relay that needs 100 ma to operate?
ISTR something about transistors, but it's been a few years since my
electronics classes....
Right now I need to be able to power LEDs, but eventually I need to
siwtch 120 VAC and 24-48 VDC at a few amps load, and I thought I could
use relays for that. But this has thrown a wrench into the works....
Any suggestions?
Thanks,
--Yan
I have an embedded computer. It had digital I/O. Per the manufacturer,
"When the DIO pins are configured as outputs, they can source 4 mA or
sink 8 mA and have logic swings between 3.3V and ground."
OK, I prefer to work as source. So... How do I get 4 ma @ 3.3V to
control a 5V relay that needs 100 ma to operate?
ISTR something about transistors, but it's been a few years since my
electronics classes....
Right now I need to be able to power LEDs, but eventually I need to
siwtch 120 VAC and 24-48 VDC at a few amps load, and I thought I could
use relays for that. But this has thrown a wrench into the works....
Any suggestions?
Thanks,
--Yan