Construct three simple circuits, one of which should be based mainly on digital electronics. These may be from a book or magazine, or circuits that you have designed yourself.
At least one of the circuits should be soldered using either strip-board or a custom made printed circuit board. Explain the principles behind the operation of each circuit and the typical values of voltage and current found in each.
Circuit Components as required.
Try some of these sites to find other circuit diagrams and components:
complete 3 simple circuits as required and to the instructions provided within the kits.