Buzzer On Base, Simple Circuit Modules Can Be Used To Construct Simple Circuits Of The Type Normally Implemented On, For Example A Worcester Circuit Board. Very Useful For Younger Pupils To Learn More Applications Of Circuits Anddevices. The Modules Are Having 4mm Plug Connections.
Capacitance Substitution Box, Capacitor Box, Using 1 Rotary Dial With 12 Steps. Various Capacitors Are Selected One By One. Useful For General Purpose Electronic Work. The Unit Has An Easily Selectable Range Of 12 Preferred Capacitors From 100 Pf To 1 Mfd