Hi,
I'm doing some course lab work and need to write up a report.
This is because of my laziness throughout the year and I missed a lab anyway. I'm a little hazy on the subject of moving coil meters and shunts/multipliers - I've been learning electronics for years and have a good understanding I just wanted to ask for some help to clear it up as this just had be a bit confused.
I have a MCM with an F.S.D. of 100μA and resistance of 1KΩ.
I have to A, modify the following circuits and calculate the component values to allow for voltages of 0 - 1V and 0 - 5V so I can read the voltages across V1, V2, V3, V1 + V2, V2 + V3, V1 + V2 + V3. The first is using the multiplier, i.e. resister in series with the MCM.
I worked out 8050Ω for the resistor to go in before the MCM (0 - 1V).
Then 48050Ω for 0 - 5V.
[Series]
>-- 5V PSU --- R1(470Ω) --- R2(150Ω) --- R3(330Ω) -->
The second circuit involves using a shunt which is the one I got really stuck with I have pages of formulas and calculations but can't get a consistent answer. Remeber this time it's parallel.
[Parallel]
>-- 5V PSU --- R1(470Ω) --- R2(150Ω) --- R3(330Ω) -->
Any help would be great or even just simplified explanations as I'm unsure on what to do?
Thanks
I'm doing some course lab work and need to write up a report.
This is because of my laziness throughout the year and I missed a lab anyway. I'm a little hazy on the subject of moving coil meters and shunts/multipliers - I've been learning electronics for years and have a good understanding I just wanted to ask for some help to clear it up as this just had be a bit confused.
I have a MCM with an F.S.D. of 100μA and resistance of 1KΩ.
I have to A, modify the following circuits and calculate the component values to allow for voltages of 0 - 1V and 0 - 5V so I can read the voltages across V1, V2, V3, V1 + V2, V2 + V3, V1 + V2 + V3. The first is using the multiplier, i.e. resister in series with the MCM.
I worked out 8050Ω for the resistor to go in before the MCM (0 - 1V).
Then 48050Ω for 0 - 5V.
[Series]
>-- 5V PSU --- R1(470Ω) --- R2(150Ω) --- R3(330Ω) -->
The second circuit involves using a shunt which is the one I got really stuck with I have pages of formulas and calculations but can't get a consistent answer. Remeber this time it's parallel.
[Parallel]
>-- 5V PSU --- R1(470Ω) --- R2(150Ω) --- R3(330Ω) -->
Any help would be great or even just simplified explanations as I'm unsure on what to do?
Thanks