Well, that's only a 6% sag, your PI should be able to ride through that if it's not too long, (you didn't say), if your PI is a "3" they need more power than the earlier models, I've seen 2.5 + Amps recommended.
Hi,You are powering a UNO and NRF from a PI USB ?Then the PI from PC USB.Get the UNO and NRF to their own supply, I'd say the PC USB is possibly failing.How old is the PC?You need one of these if you are going to daisy chain USBs.To check USB current.Tom..
When I use a big load, as washer dinner, washing machine or electric oven, voltage goes from 220/221V to 210V (sigh).
Hi,1) Does this happen when the dishwasher switches ON?Yes, when it heat the water at 60°C. Drop from 220V to 210V and "click" on the UPS2) Can you reset the UNO etc during this approx 1hr of lower mains and it will operate correctly?YesIt may be 5V at the charger, but what voltage is it at the UNO after going through the Pi.Don't forget the UNO is supplying the NRF.3) How have you got the 3.3V configured for the NRF, which NRF is it? From 3.3v itself UNO4) Have you measured the 3.3V to see how stable it is? NO5) How much current is the 5V charger supplying? 2A6) Have you measured the 5V supplies at the Pi, UNO and the 3.3V when your power drops. NO7) What periferals have you got hanging off the Pi and the UNO? I did not understand8.) What is your UPS? Powerwalker 600VAYou may need a UPS that has a boost/conditioning function, that is its output is set at 220Vac and the inverter in it keeps the output at 220Vac no matter what the input level is. > It boost the voltage. I read on display 210 IN > 220 OUT. Normal condition 224 IN > 224 OUTOn startup of the dishwasher your mains may be instantly dropping well below 220Vac before settling at 210Vac. > It is possible... Can you post a picture of your project so we can see your component layout please?Sure... it's very normal project..... NRF with dupont from UNO. Uno power from USB of PI (I need for serial communication). Power PI from Samsung 5V/2A. Power for Samsung from UPS. Power for UPS from main UPS mantain PC (24'' Led HD, I36100, SSD, 3xhd RED WD, gtx750ti) + router + PI/UNO. PC is low consuming.Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?I know its a lot, but we are in troubleshooting mode. Thanks.. Tom..