Didn't know that. Anyway the price is the same.

Seems to be the same as this one. Maybe i drop by at the big blue C tomorrow to get it.

The 1M resistor does part of the trick. The signal doesn't stay at high with the 1M resistor connected, but it shows the same signal sequence as without any resistor, so the signal peaks are still much shorter than stated in the spec

Actually the datasheets states an output current > 5µA, but i will try a 1M resistor. Maybe it works. It won't hurt anyway

I connected the GND and the Vcc of the module with GND and the 5V-pin of the arduino. I tried connecting the signal pin with D2 of the arduino with and without a 10k pull up resistor. With the resistor, the signal on D2 stays at hi. Without the resistor the signal shows the behaviour seen in my attachment. The modules datasheet clearly states a supply voltage range from 1.2 V to 5 V, so there should be no overloading. The datasheet also states a maximum ripple of 10 mVeff. Maybe thats the problem. Does anyone know the ripple of the 5V supply voltage while arduino is connected to my PCs USB-port?

I am trying this module to get to work. According the example DCFSignal, the module seems to work, but the pulses seem to be to short so that the library cant interpret it (see attached screenshot). Does anyone have a clue how to fix that issue?

Actually i did but couldnt get any clue out of this thread concerning my kind of problem.

Hi there,

i am trying to connect an DCF77 receiver to my arduino using the DCF77 library. Unfortunately the signal peaks seem to be to short. The screenshot is showing this problem. The arduino is connected directly to the receiver without a pull-up resistor. With a pull-up resistor the signal stays on high. Does anyone have a clue how to fix this?