Power supply for battery operated keyboard

"Dad, could you get me some new batteries for my keyboard?" my son asked. The same question as last week and the week before. Time to find a new solution for that power absorbing piece of Hong Kong design. And yes, I've thought about rechargeble ones, but these seem to always get lost somewhere in other electronic toys.

I decided to create a mains powers supply providing the 6 volts and about 150mA needed.
First thing is to design the schematics.

to be continued....

Welcome to my music equipment blog

The last few years I've been creating and performing music in several ways using vintage analog and digital equipment. Using these toys, one can discover new ways of using them, and as always, the hardware breaks down so now and often. But in stead of pioneering for solutions, the last years one will start browsing the net. There's always some hint or tip to be found.

Now I've thought it was time to make my contribution to the common knowledge and share some of my experiences. Hope you'll enjoy my project adventures and get inspired or can use it for your own creations.