This multifunctional device is easy to use in a variety of applications : 1) LED control of set fluid level : LOW, MIDDLE, HIGH ; 2) Controller : the relay automatically switches a pump and/or valve to keep the fluid level between the LOW and HIGH marks ; 3) Alarm : if the sensor detects a level which is too high or too low (selectable), the relay will operate a bell or other alarm device.
This Pocket VU Meter Kit With Enclosure has an LED bargraph which shows you the ambient room audio level using high sensitivity built-in microphone.
This kit has 5 red LEDs, incorporated microphone and adjustable sensitivity.
This kit has two super bright white LEDs which produce a powerful flash effect.
This kit has an Ultra bright Xenon flash tube and an adjustable flash rate. Simple board construction includes a variable flash rate control from 2-20 flashes per second.
This is a general purpose low-cost thermostat with NTC temperature sensor and output relay with LED-indicator.
This kit is ideal for the accurate control of DC motors, lighting levels, small heaters as well as other applications. The circuit converts a DC voltage into a series of pulses, such that the pulse duration is directly proportional to the value of the DC voltage. The great advantage of such a circuit is that almost no power is lost in the control circuit.
This kit is an ideal introduction into SMD (Surface Mounted Device) technology. Features: Miniature size gadget. 2 LEDs flash alternately. Great as attention grabber. And more.
This kit features red 7 segment LED displays in a modern attractive case. Automatic timebase selection gives you the option of internal or line-frequency controlled 50/60Hz. Internal timebase has a fine tuning adjustment for precision time keeping.
The Crawling Microbug Kit is always hungry for light, it drives towards it. Features include: Two open chassis sub-miniature motors. Adjustable light-sensitivity suits almost any light condition and allows to control it's 'bug-like' behavior. Adjustable speed. Choose between two different walks. And more.
This kit has signal output: sine wave, triangle, square wave and integrator (selectable through jumper). Also: signal frequency: about 1kHz (fixed) and output level: adjustable from 0 to 100mVrms (LEVEL potentiometer).
Bright red, green, and yellow LEDs are positioned just like a 4-way signal. Miniature traffic light as used on four-way junctions. Realistic operation with adjustable delay. 12 LEDs. Great for model railroads, exhibitions, as a toy, ...
This kit alternately flashes two super bright red LEDs with a built-in adjustable light sensor that automatically turns it on at night and off at dawn.
This kit is a great surface mount learning kit with a distinctive display using 6 Surface Mount (SMT) LEDs. The PC board is in the shape of a heart and is also red. The small size makes it perfect to be used as a badge or hanging pendant around your neck. Runs on a small CR2025 or CR2032 button cell (not included).
The kit allows you to create your own message for personal advertisements. 12 self definable characters, which are made by the customer. 150 bright LEDs supplied with the kit. Many spectacular light effects on the message, (scrolling, blinking, rolling, panning...). Adjustable effect speed. Vertical or horizontal position possible. Fixed displaying is possible (no effects). Different displays can be synchronized, to create longer messages, or to create giant advertisements.
