Resistors
Resistors are passive electronic components which consume but do not generate power. They are added to a circuit where they complement active components like micro controllers and other integrated circuits. They are commonly used to limit current, divide voltage and pull-up I/O lines; they have a specific, never-changing resistance. Resistors are a variety of shapes and sizes and their resistance is affected by three factors: the length, the diameter and the cross-sectional area of the wire. There are two termination types, one of which is through-hole. It has long pliable leads which can be stuck into a breadboard or hand-soldered. The second is the surface-mount resistor which has tiny black rectangles which are set by robots. There are special resistor packages which are pre-wired packs of five or so resistor arrays which share a common pin or are voltage dividers. Resistors are used in many electronic devices. A variable resistor is used to turn the volume down by turning up the resistance in the circuit that drives the loudspeaker of televisions or audio equipment. As a voltage divider, the resistor circuit can turn a larger voltage into a smaller one. Another application is in LED current limiting which prevents explosions in the series.
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Tennco Distribution Ltd
View company profileAt Tennco Distribution Limited, we are a progressive electromechanical component distributor. We are family owned and operate in niche markets concentrating on electronic and electrical components for the computing, networking, instrumentation, panel building, audio and circuit board assembly industries.
Backed by 30 years experience, at Tennco, we are committed to service and efficient components distribution coupled with ISO 9002 approval. We offer products at competitive prices with a fast friendly and efficient service.
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JPR Electronics Ltd
View company profileEstablished for over 35 years JPR Electronics are an independent electronics distributor offering a wide range of components and assemblies, with a highly flexible approach to our customers needs.
- Prices are amongst the most competitive available in the UK
- All products supplied from stock. Schedules and call-offs are welcome.
- Our full range of products can be viewed on our website. Orders can be placed online or by phone, fax or email for same day despatch.