S
Steve Minshull
- Jan 1, 1970
- 0
I'm trying to pick up interference/changes in magnetic field around a
conductor. The conductor carries 30kV pulses of 3-4mS duration and max
frequency of around 10Hz. Doing some tests with a scope lead, with the
gound connector connected to the probe tip to form a small loop, I picked up
voltages around 30V peak when in close proximity to the wire. What I want
to do is to take this signal, rectify it, smooth it a bit, clamp it to 5V
then use it to trigger a microcontroller. What is the best way of doing
this? How do I model the loop of wire? Would it be a voltage source in
series with a large resistance?
I've looked at simple diode, resistor, cap rectifiers but the component
values depend on the effective series resistance of the loop pickup.
Cheers in advance for any advice
Steve Minshull
conductor. The conductor carries 30kV pulses of 3-4mS duration and max
frequency of around 10Hz. Doing some tests with a scope lead, with the
gound connector connected to the probe tip to form a small loop, I picked up
voltages around 30V peak when in close proximity to the wire. What I want
to do is to take this signal, rectify it, smooth it a bit, clamp it to 5V
then use it to trigger a microcontroller. What is the best way of doing
this? How do I model the loop of wire? Would it be a voltage source in
series with a large resistance?
I've looked at simple diode, resistor, cap rectifiers but the component
values depend on the effective series resistance of the loop pickup.
Cheers in advance for any advice
Steve Minshull
