I keep running into the issue of paralleling a resistor to bring existing resistor back in tolerance. I can (and have) use a parallel calculator and just jam numbers in until I get right value but it's really bothering me I forgot how to do simple algebra. (Rearranging formulas)
Ok, I have a resistor of 25,000 ohms with 2% tolerance
The actual measured value is 26,200 which is 5% out
Brute force and online calculator told me I need about 500,000 ohms in parellel to bring that to 24,900 ohms.
That's great but how do I calculate that my self. I should be able to setup a simple formula to solve for unknown value. The two knowns are 25,000 and 26000
FYI : I'm not looking for an answer as I already have that using caveman logic
Thank you in advance
Ok, I have a resistor of 25,000 ohms with 2% tolerance
The actual measured value is 26,200 which is 5% out
Brute force and online calculator told me I need about 500,000 ohms in parellel to bring that to 24,900 ohms.
That's great but how do I calculate that my self. I should be able to setup a simple formula to solve for unknown value. The two knowns are 25,000 and 26000
FYI : I'm not looking for an answer as I already have that using caveman logic
Thank you in advance