oddson
Well-known member
I bought an expensive wire-wound potentiometer (10KOhm) to see how much BETTER performance it would bring to a voltage-divider-as-controller.
I thought there may be little or no difference but instead the expensive pot is much worse in terms of induced noise on a stationary control in the middle of its range.
The 10mm PC-board-mounting cheap controls I normally use typically vary in the LSB only (10-bit readings) with occasional glitches to 2 bits but the wire wound has many 4 bit changes while stationary.
I'm wondering if the wire coil is actually picking up noise itself (despite what looks like good shielding).
Anyone else observe this?
I thought there may be little or no difference but instead the expensive pot is much worse in terms of induced noise on a stationary control in the middle of its range.
The 10mm PC-board-mounting cheap controls I normally use typically vary in the LSB only (10-bit readings) with occasional glitches to 2 bits but the wire wound has many 4 bit changes while stationary.
I'm wondering if the wire coil is actually picking up noise itself (despite what looks like good shielding).
Anyone else observe this?