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Week 4- Set back In lab hours This week we combined each part of our circuit that was responsible to us separately and tested its function. We rebuilt the circuit we obtained on a breadboard to another two strip boards in order to make the whole system easier to carry. The circuit is shown below in figure 1. Two solar panels and the little port on Tp4056 that could be connected to the main electricity are used to charge the battery pack. When switched on, the battery pack would then generate the power into the amplifier circuit. Figure 1 As we expected to charge the phone we only need to plug it into the circuit, but it did not work. When we plugged it into an old iPhone 5 that is damaged but still could tell if it is being charged for testing, the phone reacted as its screen lit up, however, the battery kept dropping. %%%The video of the Phone reacted to the charger is presented in the next blog%%% Possible reasons After doing some research, we found it seems th...
Week 2--Problems occur What we have encountered As for the discussion last week, we decided to put two battery packs in a series, seeking to provide us with an approximate 20W charging power. Figure 1 However, we have discovered that this way the 5V charger would not be able to charge the battery packs since in parallel, it is 7.2V>5V. Jim has put up a thought that possibly we are able to charge two battery packs separately and use a toggle switch on the wire that connects two battery packs. However, this is not realistic for use as the user would need to switch it on each time we charge the phone. As mentioned in previous blo...
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