Update for 26-01-22 14:15

tech/Inductor.wiki

@@ -26,3 +26,15 @@ Different types of inductors lend themselves to different applications.
   * RF transmitters
 
 == Parallel and Series ==
+
+When in series, the total inductors value is added together.
+
+When in parallel, the total inductance is equal to the reciprical of the sum of
+recipricals. This means that for three inductors L1 L2 and L3, the total
+inductance of them in parallel is
+
+Total = 1/(1/L1 + 1/L2 + 1/L3)
+
+== Also see ==
+
+[[Transformers]]

tech/Transformers.wiki

@@ -0,0 +1,26 @@
+= Transformers =
+
+Transformers are an application of mutual inducatance, caused by inductors.
+Transformers transfer power between two inductors that share a mutual core.
+Two sets of windings (giving winding is primary, pulling winding is secondary)
+are used and rated in the given direction, however it works both ways.
+
+By using different amounts of windings on each side we can step up or down
+voltage and current. This is because the same amount of energy is on both
+sides, however if there are fewer turns then the energy is more concentrated,
+leading to a step up transformer.
+
+The relationship between input and output voltages are based upon the primary
+winding N,,p,, to the number of turns on the secondary winding N,,s,,. The
+relationship with their voltages _E_ is shown below
+
+E,,s,, / E,,p,, = N,,s,, / N,,p,,
+
+E,,s,, = E,,p,, * N,,s,, / N,,p,,
+
+Example,
+
+What is the voltage across a 500 turn secondary if 120V is across a 2250 turn
+primary?
+
+120V * 500 / 2250

tech/electronics.wiki

@@ -37,6 +37,7 @@ Also see
 * [[Capacitor]]
 * [[Inductor]]
 * [[Fuse]]
+* [[Transformers]]
 
 == AC/Radio ==