Who would buy a smart trash can3/20/2023 The inductive sensor will detect the inductivity of the thing, and when a non-metal thing arrived at the sensor, the thing will be pushed into the middle trash can. The same thing goes to the metal trash can. The second lid of the trash can will push the wrong trash into the middle trash can. So, when the sensor receives a big gap of light intensity, it means that a non-plastic thing arrived on the plastic trash can. We use the LDR sensor because it detects light. Plastics tend to be transparent in color, meaning that light will shine through it. To decide whether the user put their trash correctly, we put the LDR sensor in the plastic trash can and inductive sensor in the metal trash can. And if otherwise, the trash will automatically move to the middle trash can and the user will not get the reward. Once the lid is closed, the trash can will decide whether they put their trash correctly or not, and if they do, the system will automatically give them reward through RFID. If the user wants to use it, they can firstly tap their ID card on the RFID scanner, then they can approach the trash can, and when the lid automatically opened by itself, the user can just throw their trash. We also make the lid to be automatically opened when someone approaches it, so the user does not have to open the lid with their bare hands anymore. We want to reward them too if they correctly sort it, and the reward will be given through RFID. We also want to encourage people to sort their trash on their own, so we did not make it one port to sort them all, but we made them sort on their own and we check it on the system if they sort it correctly. Based on that, we want to make it easier for them by dividing it like this. We decided to only sort the metal and the plastic ones because, on the actual existing process, on the trash management center on our campus, they only sort the metal and plastic ones to be recycled. The trash can will be divided into 3 parts, the left one is for metal trash, the right one is for plastic trash, and the middle one is for the other trashes. Also, they often found the trash can not be picked up whenever they are full. They also feel that it is uncomfortable putting their trash into a trash can because they have to open the lid with bare hand meanwhile the lid is often dirty, so they sometimes would prefer to just put the trash anywhere near it. Apparently, they tend to not sort and put their trash on the right trash can, though in some places in our campus indeed does not provide trash cans for sorting. They also told us about their pain points and their expectations. Through some interviews held with some students on our campus, we acquired their behavior while using trash cans. This project involves Arduino Mega, ESP-01, ultrasonic sensor, metal sensor, and light sensor. The trash can will be divided into 3 parts, the first part is for plastic, the second part is for metal, and the last one is for other trashes. I design the solution using design thinking to make sure that the system we designed is aligned with what the user expects and solves their pain points. This project helps to solve problems faced by users in throwing the trash to the trash can.
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