8
Interface Circuit for Sleep LED
PWRDWN signal is the sleep LED when the engine enters sleeping mode. When the engine is under work, PWRDWN outputs low
level and LED D3 will not light; when the engine enters sleeping mode, PWRDWN outputs high level and the LED D3 lights.
2N3904
Q8
R1 1K
PWRDWN
R3
1k
LED
D3
R2
10K
SY S_5V
Interface Circuit for Trigger
nTRIG signal is the trigger signal. Press S1 switch so that the engine will capture image and decode once.
T10
Volt_T
B3F-4000
S1
2
3
1
4
5
6
C3
100pF
CBW1608/60R
L1
C4
100pF
nTrig
Interface Circuit for Sleep/Wake
nWAKE is a wake signal. Press S2 switch when EM2037 is in sleeping mode will make the engine back into work.
T11
Volt_T
B3F-4000
S2
2
3
1
4
C5
100pF
CBW1608/60R
L2
C6
100pF
nWAKE
