Breckland Scientific 2021 Catalogue

Electricity & Electronics

Resistors & Resistance

a

1

b

Potentiometer

c

1 POTENTIOMETER To be used as a potential divider in multiple experiments. It uses the principle that the resistance of a fixed diameter conductor varies with length. This potentiometer consists of an aluminium base with length of constantan wire mounted alongside a metre rule and terminated with 4mm screw posts. It is supplied with a jockey, for taking readings along the metre scale. Cat No. Description Price Per ELR-050-100 Potentiometer 46.20 ea. ELR-050-150 Spare Jockey 8.21 ea. 2 WHEATSTONE BRIDGE Used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. This wheatstone bridge consists of an aluminium base with a length of constantin wire mounted alongside a metre rule and terminated with 4mm screw posts. Each end is effectively connected together to form the bridge but with 4 gaps to allow the insertion of known or unknown resistors. It is supplied with a jockey for taking readings along the meter scale. Cat No. Description Price Per ELR-400-100 Wheatstone Bridge 53.34 ea. 3 RESISTANCE BOARD Three resistance wires with a cross sectional area ratio 1:2:4 are fitted on a wooden base to observe how the resistance of same length wire varies with changing cross sectional area. Termination is provided by 4mm screw/socket posts. Cat No. Description Price Per ELR-100-100 Resistance Board 70.17 ea. 4 TELEDELTOS CONDUCTIVE PAPER Suitable for plotting electric fields by means of the equipotential points method. Can also be used for producing home made strip resistors. Supplied either as a single sheet 457mm x 457mm or a pack of 10 sheets each 380mm x 530mm. Cat No. Description Price Per ELR-450-050 Teledeltos Conductive Paper Sheet 3.98 ea. ELR-450-100 Teledeltos Conductive Paper Pack 30.90 10 5 RESISTANCE PUTTY Conducts electricity and can be moulded to any shape. Particularly useful in teaching the relationship between cross sectional area and length in relation to the change in resistance. Cat No. Description Price Per ELR-150-100 Resistance Putty 22.67 100g 6 CONDUCTIVE PAINT PEN Draw circuits on a range of surfaces, solder components and repair devices and PCBs with electrically conductive paint. Electric Paint provides a great platform for discovering, playing, repairing and designing with electronics. The pen allows you to draw circuits and attach small components to your projects and is a great prototyping tool for makers of all ages. Can be used as both a liquid wire and a conductive adhesive Nontoxic, solvent free and water soluble Works great on many materials including paper, plastic, textiles and conventional electronics Once applied the paint dries quickly at room temperature, and can be removed with soap and water. Cat No. Description Price Per ELR-160-150 Conductive Paint Pen 12.58 10ml

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d

e

f

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Wheatstone Bridge

h

3

i

j

k

l

Resistance Board

4

m

n

o

p

q

Teledeltos Conductive Paper

5

r

6

s

t

v

Conductive Paint Pen

Resistance Putty

w

172

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