This user joined on 04/09/2015.
Here I built this trolley by using the technology RFID. Here we are using RFID tags instead of barcodes in the products in the supermarkets/shops. In the trolley, there is a rfid reciever. So it will automatically calculate the total prise.
I built this as a hobby project. Here by using this device, you can mix 3 audio signals into a single signal like a DJ mixer.