The linear regulator limits current to 10-20mA according to setting (potentiometer).
H-bridge is basically 4 large mosfets. The circuit fits in a box of size 5x5x2cm.
I want to make it as small as 4x2x0.5cm or smaller. I think, I can employ analogue circuitry to achieve it. I can use single nand chip to act as both sq wave generator and 'h' bridge but how will I limit output current? 2 Mosfet based current limiter I guess?