WEEK 8 (TROUBLESHOOTING)

After we complete the process of drilling and soldering, we have to tested and troubleshoot the circuit. Find the problems that found and tried to solve it. 

The problem that we found is the amount of food can’t be control. So after study the circuit operation and do some research about the IC’s. After the input is given by the adapter which is DC 6V~12V, the first IC’s which is 4060 get enough power to operate. The IC 4060 is 14-bit counter which will count and give output to timer directly. The IC 4060 sending pulses by “1” means high and “0” low. So, the timer operate when output from 4060 show high which is “1”.But, its seem like the timer does not working at all. It seem that ouput from IC 4060 doesn’t enough power to operate the timer directly.

            So, in litte bit of theoretically and also practically, to allow timer get enough power, put between them an IC 7411 which is AND gate. The AND gate function as multiplier of the high and low input which is “1” and “0”. As example, when AND gate get input which “1” and “0”. The ouput will become “0” and when the input get “1” and “1”, the AND gate output will become high which is “1”.

            So, in this case to achieve enough power for timer operate is the input AND get connected from output 4060 and VCC to keep one of the input stay high. When 4060 counting and sent high output to AND gate and the high output from AND gate will send to the timer which cause timer to operate the motor which is control the amount of food to feed the fish. 

We attach some of picture on troubleshooting :