The nomogram below can be used to estimate a potential divider.
The default values in the nomogram abocve are for Uin = 12 V, R2 = 47 ohm and Uout = 3.3 V. Since the sum of the resistances (R1 + R2) according the nomogram is approximately 170 ohm - the resistance R1 can be calculated as
R1 ≈ (170 ohm - 47 ohm)
≈ 123 ohm.
Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors.
An electric current divider outputs a current that is a fraction of the input current.
Electric conductance is the ability of a element to conduct an electric current.
Resistance, voltage and current in electrical parallel circuits.
Resistors in parallel and serial connections.
Voltage and current in electrical series circuits.
Change in electrical potential between two points.
Kirchhoff's current and voltage laws.
Electrical resistance and resistivity.
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