INDEX

GENERAL TROUBLESHOOTING TIPS
Here I am putting some general troubleshooting tips which I followed and I got from experience.After you connected the circuit, see the main things
1. see the adapter light, if it is off then some short circuit problem, if light dims then overload problem
2. If you have noise problem in the power supply connect the filter capacitors
3. Touch the IC's and heatsinks of the regulators, transistors etc.., see whether they are heated
4. If they are heated switch off the power supply and see the connections of the circuit
5. If you connected Vcc pin of the IC to ground or vice versa, then IC will get heated and sometimes chips will get burned
6. If you connected any input to an output pin then also IC will get heated.
7. Measure the power supply voltage using a multimeter to see that whether the voltage is above the desired voltage level.
8. If you are seeing the connections first check the part of the breadboard where you connected the IC is working or not.
9. Use multimeter to check the continuity test, to see the connections in the breadboard.
10. Sometimes your IC must not be inserted properly in the breadboard.
11.Check for the loose connections in the breadboard.
12.Don't keep the circuit in the heated condition, because IC's will get burned.
13.Before connecting the IC check whether the IC is working properly by verifying the truth table.
14. See the maximum current ratings of the IC's you use.
15.Be careful about the motor ratings, whether the IC's and transistors you use would be able to drive motor.
16. See the motor is working by connecting it directly to the supply(remember not to exceed the voltage ratings).
17. I connected a PIC16f628 to make a programmer, but the circuit is working(adapter light went OFF). Then i removed all the connections and just connected Vcc and GND of PIC, but still the
adapter light remains OFF. From that i can infer that PIC is not good. Don't connect Vcc of PIC to Gnd of the supply.
18. See whether the IC is inserted properly into breadboard. You can check it by using continuity test between IC and the breadboard pins.
19.Use notch to identify numbering of the leads. First notch is preferred then dot preferred See the diagram of IC741 to make things clear.
20.use separate power supply for control circuit and motor.
21. See the input voltage of 7805 >7.5V for normal operation.
22. See the loose connections in soldering
23.Check the voltage of chips in all conditions and see whether it is working properly.