Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[NerzhDishual]

Hi People,

These bloody  H-Bridges...
Used to excite coil(s) with  tricky arrangement(s) thereof might be one key for OU. No?

My question is (for low freq) :
How many relay(s) do you need to build such an H-Bridge?
My answer is : just one 4 poles relay.

Now, you, perhaps,  might consider  Duncan Pickthallp's more simple ideas.

Le bonsoir vous sied,
Jean

[NerzhDishual]

Here is the circuit:

[NerzhDishual]

OK. Here is the Duncan Pickthall'pdf

[TinselKoala]

The Secret of DPDT:

[MichelM]

Here is my analysis of P.C. circuit with flyback diodes. Who is, or is not, of my opinion?
Are the diodes well positioned and in the right direction?

FR
Voici mon analyse du circuit de P.C. avec les diodes flyback. Qui est, ou pas, de mon avis ?
Les diodes sont-elles bien positionnées et dans le bon sens ?