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Whenever two bare wires have contact with water, the light emitting diode will light up. The device is suitable to release alarm in case of overflowing rain barrels and gutters. Operating voltage: 9 V/DC. As an add-on the kit B197 - Relay card 12 V/DC, which can be connected with this kit to..

With the aid of this project kit it is possible to carry out functional tests of infrared remote controls used in TV-sets and video devices, etc. Whenever there is radiation of infrared beams on the Special-Sensor, the LED will light up and indicate that the infrared remote control is oper..

An LED lights up if a body approaches the ultrasonic sensors at a distance of 10 - 80 cm (depending on the size of the body). Use: parking assistance for cars in garages, alarm signal for persons or animals staying in a certain area. Operating voltage: 9 - 12 V/DC. The device works accordi..

After releasing the push-button, the light signal rotates quickly at the 10 LEDs, slows down and then stops at random at one of the LEDs. During operation all LEDs shine except that LED that just receives the signal. That's why the luminous board looks very decorative. Soldering requiredOperatin..

Pre-amplifier kit, universal super broadband: aprox. 10 Hz - 150 kHz! Application: 2-step preamplifier for high-power amplifier, headphones-amplifier, etc. Kit requires solderingOperating voltage:    12 - 30 V/DCFreq Response:    approx. 10 Hz - 150 KHzInput sensitivity &nb..

Relay switch card 12 V/DC Kemo B197 is activated upon currents as low as 5mA. When the low current is detected it turns on the relay to allow up to 3A of current to flow. This is an ideal project for use with other kits that have low current outputs such as lamp or LED flashers etc. Allowing you to ..