Whadda UK Madlab E-Lock Electronic Combination Lock Kit

The Whadda UK Madlab E-Lock Kit is a unique DIY electronic combination lock that you can control directly from your mobile phone. This innovative circuit uses its onboard microphone to pick up and decode DTMF (Dual-Tone Multi-Frequency) tones from a phone call. When the correct combination of keys is pressed on your phone's keypad, the integrated 1A relay activates, triggering a connected device.

Supplied as a comprehensive kit, this project provides step-by-step instructions and clear explanations, making it a fantastic educational tool and a suitable project for both beginners and experts in electronics. Assembling the kit requires soldering, offering a hands-on experience in building a functional security circuit.

Once activated, the E-Lock's relay can be connected to a solenoid or similar actuator (not included) to create a custom, electronically controlled door lock. It's an excellent way to add a unique, phone-based security feature to a cabinet, locker, or small door. Power is supplied by a standard 9V battery (not included), making the system portable and easy to install.

The compact dimensions of the finished unit ensure it can be discreetly fitted into a variety of projects. By combining modern phone technology with classic electronics tinkering, the Madlab E-Lock provides a satisfying and practical introduction to embedded systems, relay control, and basic security applications.