Here is that perfect little power supply you need on your bench to replace batteries. It is variable from 3 to 20 VDC. Using a regulator (LM7805) it delivers voltage up to 300 mA. This make a very good regulated power supply for many applications. Build one for your bench today and stop looking all over for batteries to test circuits. Easy to build comes with complete intructions and diagrams. Can be purchased assembled.
