Good Read Led - Newland NLS-EM3070 Series Integration Manual

Good Read LED

The EM3070 provides a pin (LED, PIN 10) on the host interface connector that can be used by an
external driver circuit to drive an LED to indicate a good read status. When a good read occurs, the signal
from the LED pin turns from a low level into alternation of high and low levels and a while later back to a
low level. This Good Read LED output is not strong enough to drive an LED, so an LED driver circuit is
needed.
The following LED driver circuit is provided for reference.
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