Help, HFS-DC06F radar - really unstable detection?

Other Hardware Sensors
1

Hello,
I hope someone has had de same problem and already solved it
I've bought the HFS-DC06F model 5V in/5V out (www.diymore.cc brand), to detect movements at 2-5 meters (this one exactly )
At minimum range detection, doesn't detect anything just at 5 cm. Mid range or more.. it triggers randomly(?) or not detect anything just moving at 10 cm

It seems there are several HFS-DC06 modules, going input from 5V, 8-15V,12-18V,24V.. I think my HFS-DC06F is 5Vin.

Does anyone know the differences between HFS-DC06F and HFS-DC06H or others?
I've tried:

  • Used UNO or Wemos D1 R32 (powered by USB), but nothing.
    As suggested in Old Post , UNO needs a 10Kohm resistor at the sensor's output as pulldown.
    But nothing: The problem is the sensor itself, not noise in the UNO's input data pin.

  • In generic HFS-DC06 Spec points to current greater than 30mA.
    So, I have removed the UNO. I have stripped a USB cable and directly powered the sensor (5 V, up to 500mA). 5.1V measured by tester.
    As the sensor has a built-in led that lights up on triggering, it can be tested in the same way. But the same unstable behavior.

  • Old post suggest increasing voltage to 12V, (another model?) I'm afraid of burning it so I'll be my last option.

  • Old Post suggests adding 100uF decoupling cap across the supply.
    I don't have any rightnow, waiting for the order. Could 100uF be the correct amount?

Any other ideas?
Many thanks in advance,
Albert

2

Hi,

Have you got the gnd of the Arduino and the gnd of the HFS connected?

Tom... :smiley: :+1: :coffee: :australia:

1 Like
3

Hi!
yes, GND together. Without it , doesn't power up, hehe.
I tried to put a red led to the ouput sensor with a 100ohm resistor to the same GND. It lights at the same time that the buildin the sensor: too much times.. or too few..

With the direct usb cables option without Arduino, I put the Vin and GND direct to the cable, too.

do you have an HDS-DC06F?
thanks a lot

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