- #1
mishobg12
- 25
- 0
Hi,
I am making a device with 8 INPUTs that will be connected to a long (5-25m) UTP cable running trough an elevator shaft (some interference, I imagine). Could you propose what kind of filters should I use on my inputs. The thing is, the HIGH level on these cables will be 12 to 19V but I need to convert them to TTL. I imagine some sort of voltage divider and low-pass filter. Or probably something with a transistor. I don't want to take any chances, though.
Thanks,
Misho
I am making a device with 8 INPUTs that will be connected to a long (5-25m) UTP cable running trough an elevator shaft (some interference, I imagine). Could you propose what kind of filters should I use on my inputs. The thing is, the HIGH level on these cables will be 12 to 19V but I need to convert them to TTL. I imagine some sort of voltage divider and low-pass filter. Or probably something with a transistor. I don't want to take any chances, though.
Thanks,
Misho