I did, and I tried it just now. That actually worked for a single unit but unfortunately my power supply needed to be cranked to 26 volts to get the second to boot. That being said, I decided to try the CT method. Unfortunately, the CT - by virtue of being a coil - distorts the input sine pretty badly and despite my efforts to make some more windings, does not yield a satisfactory 2V peak to peak signal on the power line.
The gents are screaming about using a voltage follower to try to interface the function generator to the rest of the circuit with a lower impedance. Off to the lab with a hand full of Op-Amps!
Hi again,
I realize i am a bit removed from the actual system you are testing so there are little things i wont know about, but i dont understand something here that seems rather basic. You say that you can turn all the units on at the same time and the boot, but when you turn one on at a time some wont boot? Sorry that doesnt make sense to me. Maybe what you are dealing with is a soft supply voltage ie input lines that are too long. If that's the case maybe you would add some capacitance across the supply lines before any switch.
What is the nominal input current draw of each unit, and are they all the same or different?
Also, what kind of batteries are you using to power this setup, and how are they connected?
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