Free online calculator
You need a value the E-series does not stock. This finds the nearest standard resistor, and the best two-resistor series and parallel combinations from the same drawer.
Series adds ; parallel divides — the trick for values just below a standard one.
What you enter
Resistor ratio— or with "Invert" ticked.
Star / delta transformSome networks — a Wheatstone bridge with a load across the middle is the standard one — have no two resistors in plain series or plain parallel, so the…
Thévenin / NortonAny linear source, however many parts are inside it, behaves at one pair of terminals exactly like a voltage source behind a series resistance — or, just…
Wheatstone bridgeEach half is its own divider, and the output is the difference between their midpoints:
Sallen-Key filterA unity-gain second-order low-pass: sets where it turns, sets the shape. Q is peaking, not frequency — 0.707 is flat to the corner, below that the…
Series / parallelSeries:
Slew rate & bandwidthFull-power bandwidth: — the highest frequency at which the op-amp can still swing the whole amplitude. Past it the output stops following and simply…