jjm electronics

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Analogue Electronics

Grampian Op Amp : build all op amp circuits simply & quickly +/- 12V Regulator : dual rail supply for op amps Wheatstone Bridge : for balanced & unbalanced bridge circuits

Optoelectronics

Variable Voltage Source : simplifies collection of data   P-N Junction Diode : with protection resistor   LED : with protection resistor   Photodiode : with protection resistor

RGC Electronics Boards

Logic Gates Board : simple, self contained testing of AND, OR, NOT gates   NOT Gate set : for building clock pulse generator   Counter Board : contains all subsystems for building counter/decoder/display   5V Regulator : add-on regulator board giving suitable power supply

Lochaber Logic Tutor

A comprehensive combinational logic tutor with a wide selection of gates, input switches and logic indicators.

Colour Mixing Box

Designed for use by pupils working individually or in small groups to investigate colour mixing, colour perception and shadows.

Input / Output Devices

Light Dependent Resistor Thermistor Lampholder LEDs Buzzer Relay Motor 7 Segment Display

Illumination and Communication kit

Full I&C pupil kit LED Investigations Board Light Sensor Board  Spare LEDs and Fibres

Angus Systems Board

Robust circuit board for introductory work on systems electronics. Uses 4mm connectors throughout.

Capacitance

Charge/Discharge Circuit : investigate voltage and current graphs for capacitor charge and discharge Constant Current Circuit : investigate Q-V relationship and measure capacitance Rectifier/Smoothing Circuit: demonstrate rectification and smoothing

Amplifiers

Simple Amplifier : to illustrate amplifier action and voltage gain   Power Amplifier : audio amplifier to illustrate power gain   Simple Amplifier : to illustrate amplifier action and voltage gain   Power Amplifier : audio amplifier to illustrate power gain

Transistor Boards

A very clear and robust set for building transistor circuits.  Addresses all outcomes at National 5 and Higher.   NPN and MOSFET transistor boards   Component Panels : screw mount to main boards to build circuits. Built circuit matches circuit diagram

Potential Divider Set

Potential Divider base board to which Component Panels screw mount to build circuits, matching circuit diagram.   Suitable for National 5 and Higher.

Teaching Chip Boards

Teaching Chip Project Board : flexible resource using overlay cards for each of the four teaching chips   Resistance and Length and Resistance and Width boards for investigation of Chip 1   Chip 4 (Ring Oscillator) Board : simplifies setting up of ring oscillator

Optic Communication Set

Experiment with audio communication link using light in air or fibre. Set includes Transmitter and Receiver boards, 1 metre optic fibre and 3.5mm input jack lead. Longer fibre available if required.

Basic Components

switch bulbholder potentiometer 4mm and 2mm leads spares and repairs