elettronica.md

Art of Electronics

Ohm's law

• V = I * R (o Z)

• R = V / I

• I = V / R

• P = I x V

• P = I^2^ * R

• P = V^2^ / R

• Rdyn = deltaV/deltaI

Kirchoff's law

• Serie: Itotal = I1 = I2
• Parallelo: Itotal = I1 + I2
• Serie: Vtotal = V1 + V2
• Parallelo: Vtotal = V1 = V2

Resistenze in parallelo

Rtot = (R1 * R2) / (R1 + R2) R1 == R2: Rtot = R1 / 2 R1 == 2R2 : 2R/3

Voltage Divider

Vout = Vin * R2/(R1 + R2)

Thevenin

Vthev = Vopencircuit (no load) = Vin * R2/(R1 + R2) Rthev = R1 || R2 = (R1 * R2) / (R1 + R2)

to find impedence: apply delta V, find delta I