Thanks Paul. I was checking out this RCWL-0515 circuit, very similar and super cool. Way beyond my understanding other than I see the layout around the transmitter / receiver antenna(s) is key.
http://www.handsontec.com/dataspecs/sensor/radar-sensor.pdf Il giorno lunedì 18 aprile 2022 alle 17:12:00 UTC+1 Paul Andrews ha scritto: > I use this: https://www.ebay.com/itm/-/183928551928 - a XYC-WB-DC. The > range is around 6m, so they are useful either for big rooms, or if you want > to hide the sensor behind a solid cover. You can adjust the range, if you > can find any suitable docs for it. Here is one image that shows some > adjustments that can be made: > https://www.faranux.com/wp-content/uploads/2017/06/Microwave-Sesnor-DC-.jpg > > A lot of people have problems with 'false' triggers that they assume are > because of noisy power supplies. This may be true, but my most successful > use of one of these is in a module that is a couple of feet away from any > electronics - I suspect that they are triggered by stray EM radiation. > Another possible cause is that these things see through walls and are > pretty sensitive. Best thing is to buy a bunch of different movement > sensors and see what works best for you. > > All my clocks use espressif WiFi chips, so I broadcast triggers to all the > clocks in the same room, so I only need one sensor in each room. > > On Monday, April 18, 2022 at 10:38:48 AM UTC-4 [email protected] wrote: > >> BL412 seems a good one as very simple. The circuitry around HR-501 is >> simple enough but quite a few components as I want to embed the circuit >> into my PCB, however it does have more options to adjust sensitivity etc. I >> was also checking Panasonic EKMC1601111 which is used on the Scope Clock >> Due that I purchased Grahame (Sgitheach, I believe he's in this group too). >> It doesn't require any ancillary components (other than a bypass capacitor >> and a resistor), but it's quite expensive about about $10 or more. >> >> I also find interesting the microwave sensor (plenty of options, I was >> checking HW-MS03), although it require very careful PCB decign (what a >> piece of engineering that is!) and I suppose it means that the enclosure of >> the electronics cannot be made of aluminium or stainless steel. This has >> the advantage of being more sensitive although microwaves travel across >> wall so perhaps too sensitive for a clock. >> >> Struggling to find the balance between simple design without it being >> overkill and something that does the job well. >> >> So many options. >> >> Il giorno lunedì 18 aprile 2022 alle 15:14:29 UTC+1 gregebert ha scritto: >> >>> I just bought a pack-of-5 from a seller on Ebay for 10 USD. They run off >>> +5 VDC, and the output signal is TTL-compatible (0 to 3.3 VDC), so it will >>> work with devices operating at 3.3V or 5V. There are many sellers of this >>> particular module, and plenty of info is available online. >>> >>> https://www.ebay.com/itm/192043733875 >>> >>> >>> On Monday, April 18, 2022 at 6:33:21 AM UTC-7 newxito wrote: >>> >>>> I use the BL412 mini PIR >>>> >>>> [image: Picture1.png] >>>> >>>> I use the mini version because I made a 3 in 1 module that includes >>>> PIR, GPS and temperature sensor. >>>> Since this thing is connected with an ugly cable to the clock, I'm >>>> currently working on a wireless version that eliminates the cable and >>>> handles all the clocks in the same room. >>>> Maybe later I will add more sensors like humidity or CO2... >>>> >>>> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/35609056-1bec-47ec-9db3-a70fc7d0490dn%40googlegroups.com.
