Attenuation Trimpot - Homann Designs DC-03 User Manual

DigiSpeed-GX™
- Users Guide Page 20
This will provide 1023 speed increments from 0 to 100% of maximum spindle speed.
With +5V is supplied to the DigiSpeed-GX™ module, and no PWM signal is present, the
LED will be a Red slow double flash. This indicates that the spindle is active but the speed
is set to 0 %. Then, when a PWM signal is present, the LED will be a fast continuous
flash, indicating that the spindle is active and the speed is set to a value greater than 0 %.

7.1.3 Attenuation Trimpot

In this mode the DigiSpeed-GX™ controller uses the attenuation trimpot to generate the
oiutput voltage. It assumes there is a fullscale analog voltage input and then attenuates it
to produce 0% to 100% of the output voltage.
With +5V is supplied to the DigiSpeed-GX™ module, the LED will be a slow double flash
when the trimpot is set to maximum attenuation by turning the screw fully counter-
clockwise..
When the attenuation is not set at maximum, the LED will flash at a fast rate, with the
output voltage generated as a percentage of the full scale voltage.
Copyright 2006 © Homann Designs Revision 0.1