Today, we went to the laboratory and try to run our circuit. The first problem that we faced was we do not know how to adjust the value of the variable resistor.
Although through the project question stated that we have to adjust the variable resistor value for R2, R3 and R4 when the switch is open. However, we do not know how to adjust the variable resistor when the switch is open. |
| Circuit diagram Therefore, we can only try and error to test out the circuit. When we ran the circuit, we got the result where it was not the result we are expected. We thought the speaker will only sound when we press the push button,but in fact the result is not like that. The result which supposes to obtain was the push button was use to change the tone of the speaker and not to use it to switch “on” the speaker. The speaker will be switch “on” once there is a power supply to the op-amp 741 and 386. |
We realize our mistake after we found this video:
Finally, after watched this video, we can conclude that the result we obtain was done successfully.
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