This sensor measures soil moisture levels by capacitive sensing, rather than resistive sensing like other common types of moisture sensor. It is made from a corrosion-resistant material giving it a...
This Arduino compatible sound level meter (also known as a decibel meter or noise meter) uses sensitive circuitry and a low-noise microphone to enable it to accurately measure the sound level of th...
A kit of parts to build a 'Wheel of fortune' style, random selector, ideal for electronic games, quizzes, etc.After releasing the pushbutton, all of the LEDs light except for one, creating a gap th...
This high quality piezo-tweeter can be connected directly to an amplifier or diplexer. The tweeter has a vaulted aluminium spherical cap and no conical membrane as is usual with flare loudspeakers....
This adjustable DC to DC converter module is ideal for operating devices that use a lower voltage than that available from a battery or fixed voltage power supply unit. The output of the converter ...
A sturdy 12W amplifier module for general-purpose use as a speaker power amplifier. The module is cast, moisture-proof and vibration-proof. The casting mass and module housing are made of a special...
A sturdy 18W amplifier module for general-purpose use as a speaker power amplifier. The module is cast, moisture-proof and vibration-proof. The casting mass and module housing are made of a special...
A sturdy 40W amplifier module for general-purpose use as a speaker power amplifier. The module is cast, moisture-proof and vibration-proof. The casting mass and module housing are made of a special...
This voltage convertor module is ideal for operating 12V DC vehicle accessories and equipment, from a 24V battery source. E.g. using a conventional 12V car radio in a truck or boat with a 24V suppl...
This Kemo preamplifier module is suitable for microphones and other general-purpose audio uses. The compact-sized module is simply connected between a weak signal source and the power amplifier.
This powerful ultrasonic generator is ideal for deterring rats, mice, wild rabbits, birds, etc. When connected to a suitable piezo speaker, the module produces an ultrasonic tone with a constantly ...
This module monitors the charge status of a 12V lead-acid car battery and recharges it automatically when the voltage falls. When the battery is full, the module shuts off the charging process and ...
Switches on other devices with the built-in relay contact after pushing the button and automatically switches them off again after a set time. The time can be stopped any point by pressing the seco...
This electronic light-operated switch automatically turns on lights or other appliances when darkness falls and switches them off again at daybreak. The module can also work in reverse, i.e., on at...
This module consists of an LED soldered to a constant current circuit. It can be connected to any voltage between 4 and 30V DC. The LED shines with almost constant brightness regardless of voltage ...
Avoid the nuisance and damaging effects of a discharged car battery with the Kemo M148A battery guard module. The module cuts power to accessories if the battery voltage drops below the set minimum...
This solar charging controller module can be connected between a 12V DC solar cell (open circuit voltage 14 to 30V DC) and a 12V DC battery to prevent overcharging of the battery.
Rain Sensor 12 V/DC If the sensor plate gets into contact with rain or slushy snow / hail, it switches on a relay. Sun blinds may be retracted with that, skylights may be closed or a simple rain al...
If the 2 sensor connections of the module come into contact with water, the built-in relay switches on. Sirens, other cutoff relays, etc. may be triggered with that.
The Kemo M168 Car Voltage Spike Protector permanently suppresses all voltage spikes in the on-board power, protecting sensitive on-board electrics against damage during jump starting or battery cha...
The Kemo P5123 Miniature Piezo Tweeter Speaker has an aluminium spherical cap for especially low distortion and constant high pitch radiation. It is highly suitable for ultrasonic vermin scarers du...
This low-cost project uses an 8-pin microcontroller to create a random output electronic dice display with LED spots. The kit includes extensive project notes that go from an introduction to the co...
The circuit is very important as it features heavily in KS4 curriculums. It has been designed to have more than one possible outcome and therefore more than one application. It allows for good diff...
This kit provides an ideal introduction to electronic circuits for KS4 students. This version of the 555 monostable project includes a buzzer element. It has been designed to have more than one pos...
A high quality, pre-drilled and printed, empty printed circuit board for use with the RK Education 555 Monostable projects, (70-6012, 70-6013 and 70-6016).
This project has been designed to introduce the important concept of astable timers and pulse-width modulation using a 555 timer astable circuit.This 'Deluxe' version contains a basic set of compon...
This project has been designed to introduce the important concept of astable timers and pulse-width modulation using a 555 timer astable circuit.This Economy version contains a basic set of compone...
This project has been designed to introduce the important concept of astable timers and pulse-width modulation using a 555 timer astable circuit.This 'With Drive Circuit' version contains a basic s...
A high quality, pre-drilled and printed, empty printed circuit board for use with the RK Education 555 Timer Astable Projects, (70-6017, 60-6018 and 70-6019).
A kit of parts to build this versatile PCB that has been designed specifically for the L298 H-Bridge motor drive chip. The kit is ideal for DC motor control and robotic projects.
This project introduces latching circuits and also other important concepts including different ways of triggering and resetting circuits. There are a number of possible outcomes for the circuit in...
