BUTTONS & SWITCHES

A miniature PCB Mount Piezo Buzzer. Requires external drive circuit to produce sound.

Voltage: 1-30V DC.

Current: 2 mA.

Dimensions: 17 dia, 8 high.

This item is contained in the Inventors kit so is a handy replacement part for that kit.

This light-activated kit is also available as a temperature-activated project kit. The output of this board can be used to control other electronic circuits, turning them on automatically when it goes light or dark.

The board has space for an LED with a current limit resistor (both available separately) which will light when the output turns on.

The Darlington pair transistor configuration allows an output current of up to half an amp to be controlled. Operating voltage 3V to 12V (lower voltages allow for better adjustment of the switching point).

Note: This kit requires soldering.

Features:

This Light Switch Kit detects the brightness of its surroundings using a Phototransistor.

The kit acts as an automated on/off switch (light dependable) for many devices.

Contents:

1 x 1MΩ Potentiometer.

2 x BC337 NPN Transistors.

1 x Phototransistor.

1 x 220Ω Resistor.

1 x Light Activated Switch PCB

Possible applications include:

Garden light that switches on automatically at night.

Drawer alarm, which sounds when a dark drawer is opened.

Line following robot (using 2 light-activated boards).

16mm linear PCB mounting potentiometer. Carbon track with serrated shaft.

Mechanical specification

Rotational angle = 300degrees; (+/-5deg;)

Rotational life = 15000 cycles Electrical specification

Carbon track Rated power = 0.125W

Maximum voltage = 200Insulation resistance = 100MA at 500V DC

SPDT micro switch, solder terminals, medium lever. Supplied as single

The microswitch Max voltage = 250V AC. max current = 5A

L 20.1, W 6.5, H 10.2mm.

A Miniature DPDT Slide Switch with solder terminals.

Max voltage = 50V DC.

Max current = 0.5A.

Body L 15, W 7, H 18mm.

Pack of 10

SPST rocker switch black, round, snap fit.

Max voltage = 250V AC.

Max current = 6A

L 16.5, Dia 23mm.

SPST standard toggle switch. Maximum current at 250V AC = 2A. Maximum current at 125V AC = 5A.

Features:

Single pole single throw toggle switch.

Dimensions (Approx.):

Length: 13mm.

Body Width: 8mm.

Body Height: 9.5mm.