IC Testing

On the 26th of January, we held our first IC Testing in the EE Lab. We thought that our experiment would only take 30 mins to complete because we were quite confident with our design of the circuit but we were wrong. Many problems occurred during our experiment and our IC Testing took 3 hours instead without even gettin the results wanted. However with the help of Dr.Jaga on our side, he pointed a few errors and gave us guides on how to determine which part is causing the faulty results. Although we didn't get the result we wanted, we've learnt alot from this experiment on how to contruct a circuit. These are the problems that occurred during the experiment.

1. All wires must be properly grounded. This caused a big problem for us as the Logic Gate keeps registering as symbol '1' whether voltage is provided into the input or not. The cause of why problem occured is because the wire was not properly grounded and thus the noise from the ungrounded wire is enough to register the symbol '1' on the IC.

2. The input voltage may not the equal to the output voltage which is required. The fan used is able to run at 5V but does not work anywhere below 5V. Therefore initially when the fan is tested, the fan is able to work but when it is connected to the circuit, it does not function anymore. This problem is discovered after replacing the fan with a small powered LED and using the multimeter it is detected that the voltage value on the output is less than 5V. This is due to the high internal resistance inside the circuit that reduces the output.