Hi Friends I want to know the value of Resistor Rx I know the value of V1 and rest of resistor values can anyone tell me the equation to find Rx resistor value thanks in advance
rmrps - imagine you have only one voltage source and one single resistor connected to this source. Can you tell me the value of this resistor?
Do you know what I mean?
rmrps - imagine you have only one voltage source and one single resistor connected to this source. Can you tell me the value of this resistor?
Do you know what I mean?
Let the voltage across Rx = Vx and battery current , I.
Then V1 = (4k7/4k7+2k) X Vx, re arranging gives Vx = V1/(4k7/6k7).
So 3.3 V = (100 X I) +VX, { 100 X I = volt drop across 100R ), rearranging, (3.3 - Vx) = 100 X I, so I = (3.3-Vx)/100.
So I is the current from the battery, some flows through the 1K (Vx/1K), some flows through the output resistors (Vx /6.7K),
The balance through Rx, So Rx must equal Vx/ this current.
Frank
View attachment 115002
Hi Friends I want to know the value of Resistor Rx I know the value of V1 and rest of resistor values can anyone tell me the equation to find Rx resistor value thanks in advance