Position: Index > Unclassified >

Micro Ampere Meter

2017-12-21 21:53  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.

micro-ampere-meter


The microampere meter

The microampere meter gives full scale deflection for 0.1 V input. The current to be measured is passed through a known resistance R and the voltage drop across it is measured.

micro ampere meter circuit diagram

PARTS LIST
R110KΩ
R210KΩ
R33.3KΩ
R4100Ω
D1IN 4001
D2IN 4001
D3IN 4001
D4IN 4001
IC1LM 741
M11 mA meter

The this table shows the relationship between different values of R5 and the current that will give full scale deflection.

R5Full Scale current
100KΩ1μA
10KΩ10μA
1KΩ100μA
100Ω1mA

A high impedance Micro Ampere meter using a 741 .The operational amplifier is used as a non-inverting dc amplifier in which the negative feedback is through a dc meter requiring 1mA for full scale deflection.

Diodes D1 and D2 protect the IC from accidental excessive input voltages and diodes D3 and D4 protect the meter from overloads.



Please send your ideas, those are very important for our success…

Share


Reprinted Url Of This Article:
http://www.electronicecircuits.com/electronic-circuits/micro-ampere-meter