Discovery of the error and repair it.

Today we had meeting our supervisors Dr.Yan to discuss our project.In the meeting at first Dr.Yan say our figure is good, but after our analysis, we find we had some error in our project, there is maybe our result is wrong. The expected and actual value is contrary. We try to back lab and had new circuit to apply our project. After we finished that we visit Dr.Yan he say this figure is right and perfect. He ask us do more and more detailed figure in the different resistance. But in the end of day, we can not make more detailed, and we do not know why. We would try in the next time.

Enter to circuit,Start measure

Today we had start our project measure, we had enter the power supply in our circuit and use the oscilloscope to display the the change of the current in the circuit. We also try to change the resistances in circuit, and try to find different when we change the resistances, what happen in the oscilloscope to display, fortunately the picture in the oscilloscope to display is very nice, in the poster we would show the resister change and the finally picture from contradistinction in there.

our circuit

 

 

Display in the oscilloscope in Group 1

Power supply always a problem

In this experiment we design use an alternating current (AC) power supply which can supply at least 3 ampere alternating current. At the first we try to contact Laboratory teachers to help us like before the holiday agreed upon, but in the lab they say can not give us. So we need think about way, after laboratory Equipment arrival there is an new problem in our project. Finally, we find a student who is in Year3 use alternating current power supply in his final project, we try to contact he and borrow the AC power supply, and today of afternoon we are in the lab to try to debugging to 3 A, in the test we try different resistance,  and burned the fuse in the power supply.Fortunately, we use 20 100Ω resistance parallel connection to finish our alternating current (AC) power supply.

AC power supply(15V)

parallel connection 20 100Ω resistances  

 

 

Laboratory Equipment arrival finally!

The morning the diode is arrive but the resistance not. We still to design and discuss our circuit and negative that. In the afternoon the resistance is arrived. And the teacher in the lab suppose our an A.C. power supply is not finished. We also try to ask the student who is in year 3 had final project like us to rent their power supply, maybe we can start the project electronic packaging in the Friday. Fight, boys!

Design the project today.

This morning when we arrived lab. The teacher in the lab the teacher tell us the experimental apparatus is order but not arrived. So we had to simulation the circuit in the Circuit Design Suite 10.0 software. the simulation circuit and the other result would show in the report if we had finished that we want try use the 

DUAL DIFFERENTIAL INPUT OPERATIONAL AMPLIFIERS to try to use in the project,  farther discuss in the future. WOW! we need our laboratory equipment

Meeting with Dr.Yan and submit Equipment requirement form

Today our group had discuss with Dr.Yan about our project, in this meeting we had show the basic current(This is the basic, will improve in the future). And the we had finish the Equipment requirement form with onncell and submit it to lab.  Dr.Yan ask to design our  plan and step of project in the holiday.

Meeting with project supervisors Dr.Yan

Today I and my partner(Zecheng Li) have meet with our project supervisors Dr.Yan in his office. In this meeting we had discuss our project "A circuit for measurement of the zero crossing of a high magnitude alternating current", in this meeting Dr.Yan give us some background documents about our project, we will read it and search  what equipment we will use in internet and submit in 12 Dec 2011.