Tesco seems to be using wireless price tags. Maybe their transmitter is sending a signal that is strong and continuous enough to cause this? https://electronic

Tesco seems to be using wireless price tags. Maybe their transmitter is sending a signal that is strong and continuous enough to cause this? https://electronics.stackexchange.com/questions/86895/how-electronic-price-tag-works https://electronics.stackexchange.com/questions/86895/how-el...