Device Prototyping Process Blog


For the last Sprint we did some prototyping work in the studio. My group was assigned the task of designing a device that helps remind children of the food on the kitchen appliance when they are cooking. I and my teammate firstly analyzed the possible scenario of a children that forget his food in the kitchen, and then designed a device that helps prevent this dangerous situation.

the scenario we designed, which indicates the device helps the children get attention back to the kitchen

After making sure the design then we build our low-fidelity prototype with the interesting tool — littlebits. Littlebits is a toy but in the studio we use it as a prototyping tool that helps us illustrate our design. I and my teammate firstly “translate” our design sketch to the combination of the Littlebits components on the graph, then we use the real components to assemble it — which I think is really good and can be applied to all the prototyping procedure.

first translate our design to littlebit combinations; then assemble it

then we got our final prototype, and the demo link is attached below:


In the studio, my group also encountered some problem: in the design the temperature sensor detects the temperature, if it’s higher than the threshold, the system would be activated, after we assemble the prototype we just use our finger to heat the temperature sensor to stimulate high temperature, but the system didn’t react. We then discussed with our instructor, and get the conclusion that the accuracy of the threshold was limited, so the system cannot react to the minor change on the temperature. This also remind us that if we build a high-fidelity prototype we need to ensure the accuracy for all the components to guarantee it works as expected in the demonstration.

wildcard: how can we design a product that meets customers’ need?

To answer this problem, we need to combine all the knowledge we learned in HCDE 210: first we need to know the target user’s need by user research, which we need to follow the basic principle: beneficence, respect on human, and justice; then we go into visualization step, to illustrate the data we collected into more intuitive graph; and ideation, to make several optional sketch for further research; then we can decide which to be applied in the prototyping step, then we could get a satisfied product that meets customers’ need.

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