J
jcpearce
- Jan 1, 1970
- 0
For my Long Ez aircraft as a pet/learning project I made a data
aquisition unit using an 8051 microprocessor and an EPIA M motherboard
running a variant of Linux to
process and display the information. It all works but the EMI from the
EPIA M causes way too much noise to the aircraft radios. I have tried
shielding the whole device in a custom aluminum case with very little
improvement.
I have seperated the entire unit from the airplane, turned off the data
aquistion unit and get the interference so it is coming solely from the
EPIA M motherboard. I get the same interference from my 2 home PC's
which are running different CPU's (AMD and Intel). I can test this with
a portable aircraft radio and walking towards the PC, around 6' or so
from them I get interference. So I would guess some supporting chip on
the motherboard is emmiting in this range (107-130 Mhz, right above
FM).
Any ideas on how to smother the EMI or some other small motherboard
which may not have as much an issue?
Thanks
aquisition unit using an 8051 microprocessor and an EPIA M motherboard
running a variant of Linux to
process and display the information. It all works but the EMI from the
EPIA M causes way too much noise to the aircraft radios. I have tried
shielding the whole device in a custom aluminum case with very little
improvement.
I have seperated the entire unit from the airplane, turned off the data
aquistion unit and get the interference so it is coming solely from the
EPIA M motherboard. I get the same interference from my 2 home PC's
which are running different CPU's (AMD and Intel). I can test this with
a portable aircraft radio and walking towards the PC, around 6' or so
from them I get interference. So I would guess some supporting chip on
the motherboard is emmiting in this range (107-130 Mhz, right above
FM).
Any ideas on how to smother the EMI or some other small motherboard
which may not have as much an issue?
Thanks