Keyboard Status Light Signals - Hagstrom KE-USB36FS User Manual

using switches with the KE-USB36FS.
Note: The KE-USB36FS allows all of the inputs to be activated
simultaneously.

Keyboard Status Light Signals

Keyboard status light drive is available with the KE-USB36FS. The
unit provides a 6 pin header for connection of the Num Lock,
Caps Lock, and Scroll Lock status LEDs. As shown below, the
Anode and Cathode connections for these diodes are labeled on
the board near the 6 pin
LED header.
As with the input header,
this LED header has
.100" spaced
which are suitable for a
variety of connectors. Soldering to the pins is also an acceptable
way to attach wires for connection to your LEDs.
The KE-USB36FS will drive an LED directly from each Anode/
Cathode pair of wires. At 5 volts, the drive current is approximately
Figure 6 - Connection of LEDs to the
Status LED Header
pins,
10 ma for each LED. The KE-USB36FS
has current limiting resistors built into
the unit, so connection to the user's
LED may be made directly.
7
Figure 5 - Status LED connection