
Series
Values add together! Leq = L1 + L2 + L3 …

Parallel
(1 ÷ Leq) = (1 ÷ L1) + (1 ÷ L2) + (1 ÷ L3) …
- If two in parallel formula can be simplified to
Leq = (L1 × L2) ÷ (L1 + L2) - Inductors in parallel reduce value. The equivalent value is always less than the smallest!
- For combinations reduce parallel into equivalent value first, then calculate series value to give current/voltage