Bread board tutorials and PROBLEMS OCCURING WITH BREADBOARD
This tutorial is taken from the book MY EXPERIENCE IN AUTONOMOUS ROBOTICS. you can download it free from the files section(FILE-ROBO.PDF) of yahoo group-booksbybibin http://groups.yahoo.com/group/booksbybibin/ comments about this book on www.booksbybibin.blogspot.com BREADBOARD Breadboard is used to make circuits. But mostly after testing your circuits on breadboard you will be making PCB. But I never made PCB for any of my circuits. Normally everyone says that if you connect on breadboard then wires may get loose and circuit will get disturbed due to shock. But no such problem occurred to me, all you have to do is to do a good wiring. Then you can gain time for making PCB's.
Above diagram shows how breadboard connections should be made.So all you require is to do a good wiring. First I will
tell about which breadboard should you use. The breadboard is different mainly
according to the size of their holes. The breadboard in Figure.1 has the smallest
hole size.
This breadboard has a medium sized holes.I
mostly prefer this one. But I have not seen this breadboard nowadays. The one
which is available nowadays is given below. Breadboards costs from Rs.80-
120(depends on place where you are in India). The main problem with small
holes is that, it will be tough to insert IC's like 7805 ,power transistors so on.
Even there is problem with size of wires also.
PROBLEMS OCCURING WITH BREADBOARD
1. As I said above some breadboards will be difficult to insert IC's like 7805,
LM317 etc.. due to the small sized holes.
2. I bought a new breadboard for Rs.80 in which some parts of the breadboard is
not working. So you should be careful about it.
3. Some part of the breadboard may suddenly create problem. This problem will
mostly eat your time. I have connected full circuit for my project and it was
working properly two months ago. The ckt consist of a 7805 which convert
adapter DC to 5V. Now when i switch ON power supply, the circuit is not
working. On examination i found that the output voltage of 7805 is 1.1V even
though input voltage to 7805 is >7.5. I was surprised to see this because i had
done same ckt a month ago and no changes made in ckt. Then i used another
breadboard specially for 7805 to make connections, surprisingly it is working
fine giving 4.8-5V.Then i connected the output from that breadboard to my
original board where ckt was connected. It is working fine. Then I again tried
in same position it is not working giving output of adapter 3-4V and output of
7805 1.1V. I doubted if the voltage regulator input is low to regulate, so i
increased the adapter to 9V from 7.5(my adapter has varying voltage starting
from 1.5V,3V..). Then the light of the adapter went off. Then I again increased
voltage to 12V. Then also light is off. Now I decided for a new position of
breadboard, where it worked properly. Then I increased voltage up to 13.5V.
For all these input voltages to 7805 the input of 7805 still remained 3.5-3.7V
and output .7-.8V. Finally I got a position of the breadboard where it worked
fine. The problem was of the position in the breadboard which i used.
4. One similar problem occurred when I connected LM324 with its input a
variable resistor. I rotated the knob of the potentiometer( it has one end on
Vcc=10v, other end on ground and middle end is connected to the LM324), the
voltage output of the potentiometer is suddenly increasing from .5 to 8.8V
suddenly with a small rotation of the knob. I tried to rotate shaft by connecting
the middle end to another portion of the breadboard, there it worked fine. I
used the same portion of the breadboard where i connected first and tried the
same after removing LM324, then also it is working fine. Then i again
connected LM324 in same position, still the old problem came. Then I changed
the full circuit to another position of the breadboard, it worked fine.
This tutorial is taken from the book MY EXPERIENCE IN AUTONOMOUS ROBOTICS. you can download it free from the files section(FILE-ROBO.PDF) of yahoo group-booksbybibin http://groups.yahoo.com/group/booksbybibin/ comments about this book on www.booksbybibin.blogspot.com BREADBOARD Breadboard is used to make circuits. But mostly after testing your circuits on breadboard you will be making PCB. But I never made PCB for any of my circuits. Normally everyone says that if you connect on breadboard then wires may get loose and circuit will get disturbed due to shock. But no such problem occurred to me, all you have to do is to do a good wiring. Then you can gain time for making PCB's.
Above diagram shows how breadboard connections should be made.So all you require is to do a good wiring. First I will
tell about which breadboard should you use. The breadboard is different mainly
according to the size of their holes. The breadboard in Figure.1 has the smallest
hole size.
This breadboard has a medium sized holes.I
mostly prefer this one. But I have not seen this breadboard nowadays. The one
which is available nowadays is given below. Breadboards costs from Rs.80-
120(depends on place where you are in India). The main problem with small
holes is that, it will be tough to insert IC's like 7805 ,power transistors so on.
Even there is problem with size of wires also.
PROBLEMS OCCURING WITH BREADBOARD
1. As I said above some breadboards will be difficult to insert IC's like 7805,
LM317 etc.. due to the small sized holes.
2. I bought a new breadboard for Rs.80 in which some parts of the breadboard is
not working. So you should be careful about it.
3. Some part of the breadboard may suddenly create problem. This problem will
mostly eat your time. I have connected full circuit for my project and it was
working properly two months ago. The ckt consist of a 7805 which convert
adapter DC to 5V. Now when i switch ON power supply, the circuit is not
working. On examination i found that the output voltage of 7805 is 1.1V even
though input voltage to 7805 is >7.5. I was surprised to see this because i had
done same ckt a month ago and no changes made in ckt. Then i used another
breadboard specially for 7805 to make connections, surprisingly it is working
fine giving 4.8-5V.Then i connected the output from that breadboard to my
original board where ckt was connected. It is working fine. Then I again tried
in same position it is not working giving output of adapter 3-4V and output of
7805 1.1V. I doubted if the voltage regulator input is low to regulate, so i
increased the adapter to 9V from 7.5(my adapter has varying voltage starting
from 1.5V,3V..). Then the light of the adapter went off. Then I again increased
voltage to 12V. Then also light is off. Now I decided for a new position of
breadboard, where it worked properly. Then I increased voltage up to 13.5V.
For all these input voltages to 7805 the input of 7805 still remained 3.5-3.7V
and output .7-.8V. Finally I got a position of the breadboard where it worked
fine. The problem was of the position in the breadboard which i used.
4. One similar problem occurred when I connected LM324 with its input a
variable resistor. I rotated the knob of the potentiometer( it has one end on
Vcc=10v, other end on ground and middle end is connected to the LM324), the
voltage output of the potentiometer is suddenly increasing from .5 to 8.8V
suddenly with a small rotation of the knob. I tried to rotate shaft by connecting
the middle end to another portion of the breadboard, there it worked fine. I
used the same portion of the breadboard where i connected first and tried the
same after removing LM324, then also it is working fine. Then i again
connected LM324 in same position, still the old problem came. Then I changed
the full circuit to another position of the breadboard, it worked fine.