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Does this sensor schematic have any problem?

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gardenyu

New Member
Hi, I haven't played with transistor logic for too long since school. So I am worried a lot.

Here is this sensor application schematic, the AMN sensor output will be about 5V, 100uA maximum, I randomly put a few parts, trying to run a few 100mA LEDs, I wonder if you could tell me if any improvement or correction is necessary? Thanks a lot.

( I didn't draw the 12V-5V regulator, maybe I need to increase the eletrolytic cap size for decreasing 12V ripples)
 

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MikeMl

Well-Known Member
Most Helpful Member
Does the sensor prefer sourcing or sinking current?
 

MikeMl

Well-Known Member
Most Helpful Member
Here is a simpler way of driving the LEDs:
 

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gardenyu

New Member
Actually the sensor is a transistor logic output, should be pretty high impedance. I also simulated your way (seems like LTspice is really popular). It makes sense. Thanks a lot.
 
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