Build your own diode/transistor tester. This tester allows checking of transistors and diodes in circuit. You can identify NPN or PNP transistors. Also check all types, small or large power transistors. Identifies anode or cathode of diodes.
WARNING: This product can expose you to chemicals including DEHP which is known to the State of California to cause cancer and to cause birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov