Ultrasonic Sonar Sensor HC-SR04


Supply: : +5 V DC

Operating current: 15 mA

Range: 2 cm – 400  cm

Ranging accuracy: upto 3 mm

Operating frequency: 40 kHz

Measuring angle: 15 degrees

Dimension 45*20*15 mm

nRF52 Development Kit


The nRF52 DK is a versatile single board development kit for Bluetooth 5, Bluetooth mesh, NFC, ANT and 2.4 GHz proprietary applications on the nRF52810 and nRF52832 SoCs.

AA Cell Holder for 4 Cells in Series for 6V Output


This is a convenient holder to keep your AA cells in place for use in any circuit or project. All the 4 cells are connected in Series to give a total output voltage of 6V, 1.5×4 = 6.0V

Stepper Motor Driver Module, DRV8825


The DRV8825 stepper motor driver can drive one bipolar stepper motor at up to 2.2A with adequate cooling. The module can easily handle 1.5A with no heatsink. A small heatsink is included and with a little air flow, it can handle up to the full 2.2A. Note that the driver IC can handle up to 2.5A, but the 0.1 ohm current sense resistors limit the output to 2.2A.

DC Fan 12V with Grill


This is an DC Fan which works at 12V DC and perfect for using as a solder fume extractor or for exhaust in a closed project to get the heat out or for those hot summer days when you just need extra air when working on projects. This fan can also be used in a solar powered home, but remember the fan takes up a lot of current and might drain the batteries quickly.

This DC Fan is included in our SOLAR KIT as well, which has a complete set of items to make a solar powered lights and fans for your home, school, class or office, check it out at Ejaad Box Solar Kit.

Spring Balance 500g for Science Experiments


A reliable and highly accurate spring-based scale to measure weight or force by vertically hanging an object to its hook.