Current Electricity | Electricity and Magnetism | Physics
SCM: SIMPLE CIRCUIT MODULES
These modules may be used to construct simple circuits of the type normally implemented on, for example, a Worcester Circuit Board. They are intended to introduce younger pupils to some of the more familiar applications of devices and circuits, the main emphasis being on simple electrical circuit work.
The modules are 60 x 60mm and have 4mm plug connections.
A. Input Board LDR
An ORP13, 4mm light dependent resistor; fully covered resistance of 10k Ohms; in normal room conditions resistance of 250 Ohms approximately.
E8H27702
B. Lamp 4.5V, 0.3A bulb in a holder. E8H27635
C. LED Boards
Large light-emitting diodes with series resistors of 220 Ohm for p.ds up to 6V. E8H27842
Red LED
E8H28366 D. Motor
Green LED
£13.10 £12.98
A low-voltage d.c. motor with series resistor to limit current consumption. E8H27908
E. Buzzer A low-current buzzer (approx 2mA). E8H28019
F. Thermistor Unit
A cluster of 5 VA1108s in parallel; resistance approximately 200 Ohm at 90°C. E8H28202
G. Light Dependent Resistor Unit
A cluster of 3 ORP12s in parallel; resistance approximately 200 Ohm in room lighting to give greater sensitivity and control the current in a reed relay.
E8H28287 H. Transistor Board
Based on an NPN TIP47 transistor with 10 Ohm base resistor and 100 Ohm collector resistor. E8H28937