Trigger Circuit; Host Interface External Circuit; Interface Circuit For Decode Led; Interface Circuit For Beeper - Newland NLS-EM2037 Series Integration Manual

Trigger Circuit

When the engine is in manual trigger mode, pull down the nTRIG pin will activate the engine to read.

Host Interface External Circuit

When using EM2037, please refer to the below circuits for connection.

Interface Circuit for Decode LED

nGoodRead signal is the LED for a good read, which should be connected to Resistance R4. The brightness of LED depends on the
resistance value of R4. Users can select a resistance value as per need.

Interface Circuit for Beeper

nBEEPER signal is the beep for power on or good read. This pin should be connected to Resistance R5. Meanwhile a schottky diode
D2 should be connected to the other end of beeper so as to avoid back-emf rising from no work of beeper.
SYS_5V
LED
D1
T7
R4
Volt_T
1k
nGoodRead
7