This tester can be used to test light emitting diodes for all kinds of function, brightness, colour & polarity. The LEDs can optionally be tested with the following currents: 1 m A, 2.5 m A, 5 m A, 10 m A, 20 m A & 50 m A. The test contact can accommodate desoldered LEDs with solder residue on their pins as well as br&-new LEDs. 2 test sockets with the same current (10 m A) are arranged side by side for selecting LEDs of the same brightness. ...

For lead-acid batteries from 6 to 24 V/DC. This battery switch can be used to charge 2 rechargeable batteries separately using a power source such as a car alternator, solar power system, wind turbine, battery charger & so on. For charging currents up to max. 10 A (20 A with cooling). The charging current is distributed so that flat batteries are charged more strongly than almost full ones. Ideal for running TVs, radios & so on from one rechargeable battery in camper vans & keeping a second battery fully charged for ignition. Also useful in holiday homes to prevent the alarm system's rechargeable batteries from running down. ...

This LED with soldered constant current electronics may be connected at any voltage between 4–30 V/DC. The LED shines with almost constant brightness & has a consumption of ca.15 m A. An additional protective resistor is not required. The supplied LED can be exchanged for any other LED. It is also possible to connect several LEDs in series. ...