{�m5�g���nI����I,�=x5�Sb�^q�vH�@�`kD�;lO�{c�m\��|2�(�V0�8��>��5jrO��đ Keep your hands on the plastic potion of the probes so you don't get shocked. Multimeters can be valuable troubleshooting tools when working with circuit boards. For this instructable you will need an led a 4aa (or aaa) battery pack a breadboard (bought from radioshack or t2retail in the uk) breadboard jumpers (from radioshack or t2retail) a few 100ohm resistors (or any value but you will need to change your layout to get the same results) and finally a multimeter (measures voltage, resistance, current ect.) Then, insert the multimeter in-line so that the current is measured as it flows through your multimeter into the destined breadboard.

Using caution not to touch any of the electrical components or wiring, plug the electrical device in and turn it on. Measuring Current on a Breadboard . The red probe goes to the test point and the black probe goes to ground or common. Test leads in appropriate socket, and then connect the probes to the points you want to measure the voltage between.In voltage modes an analogue multimeter actually measure current flowing the meter's col, but then use a bypass resistor to allow most of the current to bypass the meter. �6F{F'���;�ʭԀ�y�｛x~$3��� Watts = Volts x Current. Read the multimeter display for the voltage or resistance measurement. <> Information about your device and internet connection, including your IP address, Browsing and search activity while using Verizon Media websites and apps. 1,�㺶����h�䛫�� T5�_�Z='�Ũ#ЕItb 0����D �h'��K��v>I+>O�#��3���s�[�f"v4ʬ�����b�964��$f;�2�]SKz�U;�>, �� ^15���. To measure voltage set the multimeter to read voltage. To use the ohmmeter, you need to select it from the list of instruments in the Digital Multimeter window (see Figure 5, it is represented by the symbol). There can be dangerous voltages on circuit boards. x��Zmo�6� ���VQ+�$� Iv���h{��~P�#Ա���\��wfHJ�,�����9�7���}}Z^�\��M�����%�~þ���y�K�T�je�RY�K�E�k��g���m���P�NY:�Gw}{~v�3����~9?�,��"��i���T����,c+�������6ѳ�d�f�?��Z'�����} ��|�����cި4�fS�ͮa%Ŭ^�כd��VlQ7���M�\�v���oɼ��g��{��@[���G"_��#�/�e��}c[F�9�sV�ΊTt#�T�&� ��8٤ZZ�.�{N�k��g�tЬ�6w�׳TƔ$��w�V�f�,�T�'�EZ�Q��7���>�t�����?����e-o��`��2]�9�J&@=��S�5���_m��V�2��k}9/��\e�x9�ܔ7�B��L�����c��b�{J�"�B1��L��������1>9 �Aubj�9�`�p^�*t��^�+��n���@�Jԁ���(���̕{�dv�3���p�2�N����W�)����uvv��zZ��r�\�5��b(��d� �� -�0��3�+Eƅfs��%Ĕ���'��x� Xq�8�S�5�)K@$��,5�A?��X�q�fj4�j mB��-$j�����_�Ά�s ��������mV,�g���^�HJ;���.�J���q��V g����NfNab.q/pV�8yo��x��[��g;���V���^l���v�*6���Hip��*���rE)���G\QD�O�97����zoim)1����z�N�����y"��������/c��FË�pA�se=g9���^?u���@�kdž�7v��K

He and his wife, Robin, are coauthors of the "Free College Resource Book. 3 0 obj

Measuring current in a circuit is like measuring the flow rate of water in a sprinkler system. It's the same with electricity in a circuit. Move on to the next test point or resistor and repeat the measurement. That is how easy you can do the measurement of current. Select your multimeter function to measure voltage or resistance by turning the function knob or selecting a function button. This guided hands-on laboratory activity to help a student understand the proper and safe use of a multimeter to measure current using an electronic labs kit. Yahoo is part of Verizon Media. Find out more about how we use your information in our Privacy Policy and Cookie Policy. ������: When troubleshooting electronic assemblies, keep a small bowl nearby for loose parts so you don't lose them.

Remove any housing on the device in order to gain access to the circuit board. This video guides the student through the proper techniques for measuring current with a multimeter. <>>> ", Copyright 2020 Leaf Group Ltd. All Rights Reserved. To find out how fast the water is flowing you must insert a flow meter in the line. Tutorial – Building circuits & using a multimeter 3 Measuring the resistance Figure 6 presents the circuit diagram for measuring the resistance value of a resistor using an ohmmeter. Select your multimeter function to measure voltage or resistance by turning the function knob or selecting a function button. If you're measuring the resistance of resistors, connect one probe to each end of the resistor. 1 0 obj The electrical schematic of the circuit board will tell you which type of voltage is present. F��*�Ц0/ U��Q������^Wlb��i����nK.�d�$������.��$��~�Z�)�^|�8����-�G��W�c�

%PDF-1.5 After you've made all your measurements, turn off the electrical device and the multimeter. Insert the black probe banana jack into the black multimeter plug.

If they are the same, it will give you confidence that the circuit board is operating normally. R3ϰ��N��@bB�V�y��Ժ&��fI��|N҃1S��/@�@ұ�3ԅ�A�TY�l��=Q��'�"F�>��a�c�} \�K����_Q��8�\0]mP���ik��b�pi��s�x�i�z���,0鵱� ��(cf�SE=�2�z�6]֔� ��SHByo��uVd�BK�ш�����c�I�����H%��xm���7S��(c��!�$Rh�c/�XZ�KjH��A�z�b��ɡ)�.|�62(`�eq���� Be aware that the port may not be able to supply the required current at the required voltage. If you're going to measure voltage, such as measuring the power that is supplied to the circuit board, select either an alternating current (AC) or direct current (DC) voltage.

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