speed controller for model boats

7-96 — e4ektor july/august 1981 W. Gscheidle speed controller for model boatS Of course, every one who constructs model ships wants his model to be as accurately detailed as possible. That includes obviously a means of infi- nitely variable speed control of the model, both in forward direction and in reverse. As a rule, however, this often remains a bit of wishful thinking as most basic models do not have this facility. When the model enthusiast wants his ship to steam forwards or in reverse at less than full speed, and wants to have a good degree of control over the speed by means of a "joy-stick", then the amount of money to be spent on his hobby may be quite considerable. The cost of an electronic speed control will clearly home built. This is not be less when such a circuit is exceptionally difficult, because servo driver ICs are easily obtainable. The circuit is built round the IC SN 28654 of Texas Imo 48V" JUL` 1 IC3 TIL 111 6V 2 105 10V Tant Tent IC4 TIL 111 BC 557 6V 3 I...