Delinquent
New Member
Hi all, looking for a bit of urgent help!
I found the following schematic on the net:
**broken link removed**
The pot should IMO have the take off at the wiper not both ends, but regardless, other than that this does exactly what I want... erm... almost! The problem is the layout of the circuit. I want to use the circuit (or produce the same end result) with a pre-existing sensor lead I have. This is a 3.5mm stereo jack wired to a IR transmitter and receiver, wired thus:
**broken link removed**[/IMG]
Which I cannot modify as it works with a different device as well, which I need to incorporate this circuit into.
Reading and researching, I think I can replace the NPN 2n2222 with a PNP 2n2907a and then just move the pot between base and ground, with the output from the IR rx then going in to the base between base and +ve?
But... that is all based on my total knowledge of transistors (and pretty much electronics completely!) being learned today, off the net, in breaks between work!
Could anyone revise the above schematic for me so that my above sensor can just plug in before I destroy any more components with the soldering iron?!!
I found the following schematic on the net:
**broken link removed**
The pot should IMO have the take off at the wiper not both ends, but regardless, other than that this does exactly what I want... erm... almost! The problem is the layout of the circuit. I want to use the circuit (or produce the same end result) with a pre-existing sensor lead I have. This is a 3.5mm stereo jack wired to a IR transmitter and receiver, wired thus:
**broken link removed**[/IMG]
Which I cannot modify as it works with a different device as well, which I need to incorporate this circuit into.
Reading and researching, I think I can replace the NPN 2n2222 with a PNP 2n2907a and then just move the pot between base and ground, with the output from the IR rx then going in to the base between base and +ve?
But... that is all based on my total knowledge of transistors (and pretty much electronics completely!) being learned today, off the net, in breaks between work!
Could anyone revise the above schematic for me so that my above sensor can just plug in before I destroy any more components with the soldering iron?!!
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