Garyl
Full Member level 5
Hey
I have a working counter-based impulse/freq counter on PIC24F
It's a 3.3V device.
Now I want to counter 8V or so impulses.
I tought that I will use a single transitstor amplifier (I saw such solution on web).
Here is the schematic:
I have selected the resistors so there is around 1.65V on the collcetor and connected it to PIC pin, but then the voltage drops to 0.
I have confirmed it with oscliscope.
Why is it happening?
I have a working counter-based impulse/freq counter on PIC24F
It's a 3.3V device.
Now I want to counter 8V or so impulses.
I tought that I will use a single transitstor amplifier (I saw such solution on web).
Here is the schematic:
I have selected the resistors so there is around 1.65V on the collcetor and connected it to PIC pin, but then the voltage drops to 0.
I have confirmed it with oscliscope.
Why is it happening?