So why not use the latching relay driver in post #17?I had already written which relay it was in post number 7.
this is what I wrote:
"I need it to drive single coil bistable relays.
in these relays the current flows in both directions. ".
what does this sentence mean?
"snd we are now teaching"
I didn't know I was in school , who is the pupil ?
the first circuit you propose is made for double coil bistable relays with a common terminal.
I don't like the second circuit. when the coil of the relay has to discharge it is found in front of two resistors in series which in total make 94 ohm more when the transistor is in saturation most of the current goes on the resistance.
I have only one driving channel coming from the cd40193 and not two, otherwise I would have used a full H bridge which are specially designed for this purpose.
if I insist on the single coil bistable relay there is a reason.
You won't need a split supply.