Hey guys,
I'm working on a project where I am sending digital signals from a keyboard into a FM transmitter and then retrieving the signal and inputting it into a PIC.
The issue I have is the output of the decoder I have doesn't output to a proper voltage for my FM transmitter. A friend suggested I use a transistor switch to boost the voltage of the signal so it matches what I need but I'm not sure what I'm supposed to do.
I have a 5 V supply and need to boost a .5 V digital signal to a 1.375 V. Then I also need to boost the 1.375 V my receiver outputs to 5 V. I have a bunch of 2n3904 transistors.
I looked online and I found a few diagrams of how it should work, but when I implement them it doesn't. I tried this one and used a voltage divider on the Emitter to get 1.375 V but when i test it on the scope I get a small square wave at .3 V. Oh and I removed the capacitor cause it distorted my signal.
If any one has any suggestions on building it, or know a different method, I would appreciate it.
I'm working on a project where I am sending digital signals from a keyboard into a FM transmitter and then retrieving the signal and inputting it into a PIC.
The issue I have is the output of the decoder I have doesn't output to a proper voltage for my FM transmitter. A friend suggested I use a transistor switch to boost the voltage of the signal so it matches what I need but I'm not sure what I'm supposed to do.
I have a 5 V supply and need to boost a .5 V digital signal to a 1.375 V. Then I also need to boost the 1.375 V my receiver outputs to 5 V. I have a bunch of 2n3904 transistors.
I looked online and I found a few diagrams of how it should work, but when I implement them it doesn't. I tried this one and used a voltage divider on the Emitter to get 1.375 V but when i test it on the scope I get a small square wave at .3 V. Oh and I removed the capacitor cause it distorted my signal.
If any one has any suggestions on building it, or know a different method, I would appreciate it.