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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-Group meeting Our team had a meeting after discussing some detailed problems and expressing our concerns about the project with our academic advisor. The things we have covered Tp 4056 is a chip that prevent the battery pack from being over-charged as it could automatically shut down once the voltage across the battery pack reach the maximum charging value of 4.2V. Red light indicates that it is being charged and blue light would appear when finished. Tp4056 is easy to get overheated as we found out last week when experimenting with the circuits. We later discovered a possible reason that caused it could be because the input current has exceeded the required maximum current for tp4056. For maximum 1A, we have put it into work with 2.2A input. Figure 1: TP4056 During this group meeting, we recognized several more components we would like to order, including the toggle switches that are used to separate the circuit in case the battery would be charged and discharged at ...
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