Amp Meter | Electronic Project Circuits

Posts Tagged ‘amp meter’

Solar Panel Current Meter

This circuit is used to measure the current from a solar panel. It has very low power loss for currents in the 0-10A range. It also works as a general purpose DC current meter. The circuit can be used on either the positive or negative side of a DC circuit.

Digital Volt and Ampere meter by CA3161E + CA3162E

Voltmeter: Short circuit in the input, pins 10 and 11 [IC1] and we regulate the RV1, until we take clue in the Display, zero in all the digits. We rectify and connect in the input a external voltage roughly 900mV. With the RV2, we regulate so that we take the clue 900mV in the Display. At the same time, we check this voltage with a external multimeter, of good quality and precision.

Amperemeter: Short circuit in the input, pins 10 and 11 [IC3] and we regulate the RV4, until we take clue in the Display, zero in all the digits. We rectify and we connect in + IN point, provided that we place in series with the positive pole, of battery, a resistor 10R/10W and in the ï¿½IN, a new battery 9V. We regulate the RV3 so that we take clue in the Display 0.90A. We check simultaneously the correctness of measurement with a external digital ambermeter. A point that it should we are careful, the capacitors C4 and C9, it should they are very good quality. Also the various in the placement of resistors R4 and R7. of connection two circuits, for measurement voltage and current, appear in the Fig.3. The power supply that is public for two circuits appears in the Fig.4. If exist suitable constant supply in the appliance in which will be placed permanently the circuits, then can remove the T1 and bridge GR1 and is connected this voltage, in point A. The IC5 good is placed in heatsink.

Feature

V in maximum: 100V [99.9V]

A in maximum: 10A [9.99A]

Max. measurement Voltage Error: 100mV

Max. measurement Ampere Error: 100mA

* Digital Volt and Ampere meter in Greek

Part List

R1=680Kohms C1-5=10nF IC2-4=CA3161E Intersil-Harris
R2-6=1Mohms C2-6=47uF 16V IC5=7805
R3=6.8Kohms C3-7-10-11=100nF GR1=4X 1N4001
R4-7=270 ohms C4-8=220nF 1% Q1……6=BC557
R5=0.1 ohms 5W C9=2200uF 25V DS1……6= 7Segment Display common anode
RV1-4=50Kohms trimmer 10 turns C12=10uF 16V T1=230VAC/6VAC 1A
RV2-3=5Kohms trimmer 10 turns IC1-3=CA3162E Intersil-Harris

Read More Source :http://users.otenet.gr/~athsam/digital_volt_and_ambere_meter_eng.htm
Thank you.