Hi,
I'm also planning to make a pico clock with a DCF77 receiver.
When interpreting this thread it souns like switching on GPIO23 actually did work for you?!
Unfortunately not for me... or did I miss something?
My normal setup are two picos, one as picoprobe connected via USB to my desktop PC and the other one connected to the first one.
I also tried another setup with a 12V power supply and a 5V DC/DC converter.
That's the one I've got.
VDD on 3V3, GND on GND, OUT on GPIO16.
I would expect to see the DCF77 100ms / 200ms pulses on the LED, where i put it out directly.
Nothing happens.
TP4 has 3,3V, in some positions or when moving the receiver I get some flickering on the LED, but no stable 1s DCF signal.
If it works for you - what am I doing wrong?
Unfortunately I've got no oszilloscope.
UPDATE:
When putting a LED on the DCF77 OUT, I actually do get a obviously correct signal! It's not perfect but maybe sufficient.
As soon as touching the DCF77 OUT with the GPIO it stopps working and hungs up.
I added "gpio_set_pulls(16, false, true)" maybe that's contra-productive, how should the pull-up/down situation be?
I'm also planning to make a pico clock with a DCF77 receiver.
When interpreting this thread it souns like switching on GPIO23 actually did work for you?!
Unfortunately not for me... or did I miss something?
My normal setup are two picos, one as picoprobe connected via USB to my desktop PC and the other one connected to the first one.
I also tried another setup with a 12V power supply and a 5V DC/DC converter.
That's the one I've got.
VDD on 3V3, GND on GND, OUT on GPIO16.
I would expect to see the DCF77 100ms / 200ms pulses on the LED, where i put it out directly.
Nothing happens.
TP4 has 3,3V, in some positions or when moving the receiver I get some flickering on the LED, but no stable 1s DCF signal.
If it works for you - what am I doing wrong?
Unfortunately I've got no oszilloscope.
Code:
const uint LED_PIN = PICO_DEFAULT_LED_PIN;int main() { gpio_init(LED_PIN); gpio_set_dir(LED_PIN, GPIO_OUT); gpio_init(16); gpio_set_dir(16, GPIO_IN); gpio_set_pulls(16, false, true); gpio_init(23); gpio_set_dir(23, GPIO_OUT); gpio_put(23, true); while (true) { gpio_put(LED_PIN, gpio_get(16)); }}When putting a LED on the DCF77 OUT, I actually do get a obviously correct signal! It's not perfect but maybe sufficient.
As soon as touching the DCF77 OUT with the GPIO it stopps working and hungs up.
I added "gpio_set_pulls(16, false, true)" maybe that's contra-productive, how should the pull-up/down situation be?
Statistics: Posted by Michel_0 — Sat Jan 11, 2025 10:04 pm