Generates a deep, noisy sound similar to the fog-horns of ships.
After pressing the key the installed relay switches on for approx. 2sec up to approx. 5min (adjustable) and then switches off again.
The kit switches on/off a relay at light and darkness (shadow).
Warship siren "Clear decks for action". In rapid intervals sounds a shortly swelling tone!
Super broadband: approx. 10Hz-150kHz! Applications: 2-step preamplifier for high-power amplifier, headphones-amplifier, etc.
2 differently coloured light emitting diodes will flash alternately. Adjustable flashing velocity. Usage: flashing adornments, name-plates, for miniature constructions etc
After pressing a key this digital die indicates depending on chance a number between 1 - 6. Indication takes place via LED's.
The converter makes it feasible to receive, for example, taxi radio, amateur radio, marine radio broadcasting, television sound, etc. through an ordinary FM-radio. The converter has simply to be placed within the antenna lead!
Adjustable time switch for switching operations from approx. 1 sec. to approx. 40 minutes. The device switches on after pressing the key and switches off again when the adjusted time has expired. The lapse of time may be interrupted any time with the reset key.
For testing highly resistive and low impedance connections. An extremely low holding-wire current flows (< 10 µA). If the connection is conductive, the piezo buzzer hums. Also usable as rain indicator when the test probes contact water!
Easy instructional kit for beginners ages 8 and up. The cables are not to be soldered, only screwed or twisted. The experiments are explained through illustrations and helpful descriptions. A 4.5 V - flat battery (not included) serves as current source.
Electronic flasher unit for glow lamps. Also suitable as alternating flasher. Flashing frequency: approx. 1 - 3 x per second. Ideal for usage within miniature constructing! Together with the additional kit B197 is feasible to operate flashers with loads up to 3A current consumption!
Electronic flasher unit with a great Ø 8 mm light emitting diode. For decoration, models etc.
This generator produces ultrasonic sounds, which are adjustable within the range of approx. 8 - 35 kHz. It is said, that crawling and jumping parasites are banished through the ultrasonic sound. Frequency can be adjusted so that the domestic animal will not be disturbed.
With the aid of this circuitry it is made 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 operated.
Poduces very life-like the wheezing and hissing of a steamer. Furthermore a steam whistle and steam bell may resound.
With the enclosed optics and highly sensitive photodetector this light barrier has a max. range of up to 50 m! The infrared light ray is invisible for men. If the light ray between the transmitter and receiver is interrupted (if a person walks through it) the relay in the receiver switches.
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.
This device produces a high ultrasonic sound (approx. 23 kHz). Martens, mice, etc. find this sound extremely annoying and these animals will leave that place (most). Ideal for installation into cars (as protection against martens), in houses against mice, etc