the second week of this project

This week, the tutor suggests our group to begin to build the circuit first. The RE200B is hard to simulate in the Multisim,so we decide to build it first. Through the effect of morning, the circuit has been finish. we connecct the energy sourse and oscilloscope with the circuit. when we set the voltage to 12v  and adjust the current. however, because of the teammate's faults, the circuit's current has became too big. In this case, the diode has an explosion in the process. our circuit has some lines has been in the wrong place. in the meantime, the current is too big to adapt the electronic components.
 From this problem, we check the circuit and test again. in this case, we fail again. the oscilloscope can not output the screen of the RE200b.
From this case, we have to change our circuit again. the final circuit is like the picture 4.