IR led and photo transistor circuit

Status
Not open for further replies.
M

maxim10373

Advanced Member level 4
Joined
Feb 26, 2010
Messages
116
Helped
1
Reputation
2
Reaction score
2
Trophy points
1,298
Activity points
2,064
hello
I have a small project which is need to negative switching. Is negative switching possible with IR sensor ?
IR Led with photo transistor circuit readily available .
 

A phototransistor works similar to an NPN. The obvious circuit to build is a common-emitter amplifier. It inverts the signal (light shining). Which is to say it provides a path to ground. Is that the kind of switching your question is about?
 
Hi,

What do you mean with "negative switching"?
I don't have a clue what you want to achieve and why .... and what's the exact problem.

maxim10373 said:
IR Led with photo transistor circuit readily available .
Click to expand...
This is good for you. But what can we gain from this information? ...since we can't see the circuit...

Rarely that 1 and 1/2 lines of text can precisely describe a problem in a forum.
What about using a sheet of paper, a pencil and doing some drawings. Block diagram, a schematic, a signals...

Klaus
 
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…