S
Simon Morden
Guest
Hello again. I'm the bloke who was on a few months ago worry about his
frequency-voltage converter. Which now works magnificently, and we have
one wind tunnel up and running.
So - on to Mk II. I intend to put all the components on one circuit
board, with one power source: a regulated 9v DC supply with a max power
of 350mA.
The IR LED/sensor works at 4.5v, the f-v chip at 9v. Is there anything
to stop me from slapping down a variable resistor and taking the 4.5v
from it?
If not, how ought I calculate the value of R I need?
If yes, how should I do it?
Simon Morden
--
Visit the *all new* Book of Morden (www.bookofmorden.co.uk)
"I haven't had that much fun with a novel for a while." - Bookbag
The Lost Art - from David Fickling Books
frequency-voltage converter. Which now works magnificently, and we have
one wind tunnel up and running.
So - on to Mk II. I intend to put all the components on one circuit
board, with one power source: a regulated 9v DC supply with a max power
of 350mA.
The IR LED/sensor works at 4.5v, the f-v chip at 9v. Is there anything
to stop me from slapping down a variable resistor and taking the 4.5v
from it?
If not, how ought I calculate the value of R I need?
If yes, how should I do it?
Simon Morden
--
Visit the *all new* Book of Morden (www.bookofmorden.co.uk)
"I haven't had that much fun with a novel for a while." - Bookbag
The Lost Art - from David Fickling Books