Blog 7

Blog 7 

In this blog, i will be showing everything related to my groups prototype. Our prototype is a watch which we made using cardboards. The mechanism we used for this prototype is gears. We initially wanted to use bevel gears to set the time for the watch but it was too difficult. We decided to just use two gears side by side to set the time. The gears push each others which in turn move the minute and hour hand of the watch.

What is the problem here

     

Literature reviews

What are our ideas

Design Specification

Name:power-ranger Brief description: It gives you special power to charge your watch making you unique and giving off superior energy to stand out from the crowd
Aspect	Specification Metric (or Quality)	Quantitative Value
Physical	Lightweight	< 100g
	Compact	Original(plaster) 7.3cm x 1.5cm(plaster) 2.5cm x 1.2cm (electrodes) Prototype 15cm x 5 cm (plaster) 5cm x 4cm (electrodes) Watch 21cm x 2cm
	Amount of voltage generated	Able to generate 4.2V
	Amount of power produced	3.9mW
	Amount of current produced	0.93mA
	Thin	0.1cm thickness Prototype: 0.5cm thickness
Functional	Water resistant	IP67
	Easy to use
	Operation time	48 hrs
	Minimal setup time	<10 sec
	Generating a total of 3mA	3 electrochemical cells=2.8mA
Others	Inexpensive	<$70

This is how our product looks like in CADD

This is our hero shot

Operating principles

Our product uses electrochemical cells. We make use of the sweat to generate power to power up the watch. Big brain ngl. We make use of the ions in sweat and make use of electrochemistry to generate power. This way, we make solve the issue of sweaty palms by absorbing the sweat. We even made the user life easier by charging his or her watch.

Making of the device

We first draw out what we want to cut on the cardboard. 

This is the electrochemical cells and the plaster

This is how the plaster to the watch looks like. For this, we decided to scale up when making the prototype as the actual size is too small.

This is how our watch looks like after we put everything together