Digital multimeter (DMM). Must measure DC and AC voltages, DC current, and resistance. More expensive models may measure capacitance and test transistors, but these are not necessary for the projects in this book.
• Battery holder for AA cells (Get one with preconnected cells and an off/on switch. Jameco 216187 is recommended. In fact, buy two as you will need another supply for later projects.)
• Battery ...
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