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 possible outcome and therefore more than one application. It allows for good differentiation and includes a transistor drive circuit. * Time can be varied with the variable resistor * Can be used with various trigger inputs * Battery-powered * Clear silkscreen text has been used to make construction simpler * Professional double-sided PCB pre-drilled with silkscreen and solder-resist Empty PCBs are available separately, order code 70-9034 Suitable for Key Stages 2, 3 & 4 (ages 7 to 16) Comprehensive teacher notes are available here. https://elecena.pl/product/27204647/rk-education-555-monostable-project-with-buzzer 2024-11-09 https://elecena.pl/product/27204647/rk-education-555-monostable-project-with-buzzer 2025-09-13