- #1
kylecivicsi
- 2
- 0
This is my first post, so a little background on me: I am a senior in EE at UofL, I am currently working for a company who has given me a larger project to complete (They kept me on part time while I finish school). I have not taken any analog or digital design classes, so I fear I am in over my head, so to speak.
One of the circuits I am working on takes an output from a uP, and converts it into a current puls over a pair of wires. The wires have a series of voltage pulses on them that is used to communicate to the uP, and the uP responds by inserting a current pulse during the 'low time' of the voltage pulses. The uP must be electrically isolated from the comm wires as well.
I am having trouble developing this circuit, as the current pulse must be adjustable from ~0-45mA and also from 0-40mS in duration. I have done some extensive google-ing and really have no idea where to start.
I suppose I was hoping one of you more experienced guys might have some ideas. Thanks in advance for any help you may be able to throw my way.
One of the circuits I am working on takes an output from a uP, and converts it into a current puls over a pair of wires. The wires have a series of voltage pulses on them that is used to communicate to the uP, and the uP responds by inserting a current pulse during the 'low time' of the voltage pulses. The uP must be electrically isolated from the comm wires as well.
I am having trouble developing this circuit, as the current pulse must be adjustable from ~0-45mA and also from 0-40mS in duration. I have done some extensive google-ing and really have no idea where to start.
I suppose I was hoping one of you more experienced guys might have some ideas. Thanks in advance for any help you may be able to throw my way.