External Circuits; Good Read Led Circuit; Beeper Circuit - Newland NLS-EM20 Integration Manual

External Circuits

Good Read LED Circuit

The circuit below is used to drive an external LED for indicating good read. The left part shows internal
Good Read LED driver circuit on the decoder board and the right part shows external circuit that users
may utilize in actual application. The nGoodRead signal is from Pin 10 of the 12-pin FPC connector.
Internal LED Driver Circuit

Beeper Circuit

The circuit below is used to drive an external beeper. The left part shows internal beeper driver circuit on
the decoder board and the right part shows external circuit that users may utilize in actual application.
The nBEEPER signal is from Pin 9 of the 12-pin FPC connector.
Internal Beeper Driver Circuit
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Fig. 4-4
Fig. 4-5
External Circuit
External Circuit