Date: 24-09-2018
Day: Monday (Week 10)
Venue: Apartment UniKL BMI

After finished solder the second circuit, i focus through the main circuit. This main circuit is very complicated because have use many component like LEDs, buttons, LCD, and two NodeMCU 8266. The all circuit already finished wiring on breadboard and want to convert the circuit into stripboard.

For the first trial, i use the stripboard got the problem because not really function. I already checked the continuity connection on the stripboard with multimeter that not have problem. But, i dont know why the circuit still not function. 

So, the last choice idea, i try not to solder the LCD and LEDs on stripboard and just connect the jumper wire outside from the stripboard. I used the PCB etching technique that for buttons circuit only. Then, for the LCD, i use the arduino jumper and connect to the arduino while the LED and button use the normal jumper wire. Before that, i try to use all the connection wire using the arduino jumper for buttons, LEDs and LCD. The result, button cannot be function. i think the arduino jumper is only compatable with arduino component.

Date: 17-09-2018
Day: Monday (Week 9)
Venue: Apartment UniKL BMI

Finally, the second circuit is really good function. I have solve the problem with change the resistors to make the servo is move efficiency. The real circuit in youtube source has using the Mega ohm resistor for R3. So, i change to reduce the third colour band of resistor R3 to get smooth movement for servo. Furthermore, i also change the resistor R1, R2 colour band and added one resistor to switch S2. Then, the limit switch will be added connected after S1 and connected to the ground.

The flow of circuit for limit switch is when the S1 is pushed, the current will flow to the LM555 and the same time limit switch is Normally Close condition. Then, when the limit switch trigger in Normolly Open, the current from ground will block through the S1 and the same time when push the S1 cant through current to LM555. 

In above show the completed circuit has been finished. I use the arduino 101 for give a supply Vin in 12V. Actually, in data sheet for servo can support 3V-6V only. But, i dont have a 6V voltage adapter and forced to be used a 12V adapter. 

Date: 9-09-2018
Day: Sunday (Week 8)
Venue: Apartment UniKL BMI

Last week, i create the second circuit to open and close the front door of Smart Mailbox using a arduino software. So, i found the circuit that did not using a arduino software. This circuit have using two push button, resistors, diode, capacitors, servo motor and LM555. finally i got a good result where the circuit i really good function.

For the first impression i want to make sure the the servo is function when both of button is pressed. Actually, i use the recyle components and already have one servo motor SG90 tower. So, i need to use it because want to save the budget. Furthermore, that also not a serious problem when i not use a real component like a photo. The servo and button can function but not really compatable with the voltage or resistance. So,i need to think harder how to modify and make it happen.