- Resistor colour code calculator
- LED series resistor calculator
- Series / parallel resistor calculator
- Capacitance unit converter
- Charge / Energy calculator
- Capacitor code calculator
- Series / parallel capacitor calculator
- Convert colour code to inductance
- Convert inductance to colour code
- Ohm Law calculator
- Potential Divider calculator
- Wheatstone Bridge calculator
- Power (wattage) calculator
- Reactance calculator
- Technical Data
- Beginners Guide
Links - Electronics Components, Kits & Test Equipment
4-Star Electronics - Supplier of obsolete semiconductors, relays, connectors, switches, CPUs, hard drives & military-spec components.
APD Anglia - UK supplier of RFID products to hobbyists, schools, experimenters, engineers & OEM manufacturers. Includes an excellent tutorial on the basics of RFID & details of protocols.
Apogee Kits - US company selling a variety of electronic kits. Online ordering facilities.
Bardwells - UK distributor of electronic & electrical components, products, tools & test equipment.
Bitsbox - Online UK distributor selling a selection of electronic components, hardware and kits. Low postage charges.
Bug Plan - Professional schematics (plans) for a variety of surveillance circuits.
B.K. Electronics - Manufacturers and suppliers of audio and cinema equipment.
Component Bin - UK supplier of microcontrollers, graphic LCDs, modules and evaluation boards.
CrazyWires - Experiment / prototype board for 18-pin PICs. 6 open collector outputs, 7 filtered inputs, voltage regulator and resonator. Site includes schematic diagrams.
Digital Meters - UK supplier of test and measurement equipment. Includes multimeters, light, PH and humidy meters and more.
DMC RF - Supplier of RF and microwave modules, filters, attenuators and other related devices.
Electronic Toolbox - US supplier of a wide range of electronic tools & test equipment.
ElectronicsUSA.com - U.S. based manufacturers of electronic kits and other products including clocks, timers and radio equipment. Site includes product details and online ordering.
ESR Electronics Components - UK supplier of a large range of semiconductors, components & equipment both to private individuals and to businesses. ESR also stock the full range of Velleman kits & modules.
Farnell - Farnell's range is very extensive - including some not-so-common parts. They also have an online catalogue including a large datasheet library.
Fast Components - Suppliers of electronic and mechanical component kits. Range includes resistors, capacitors and fixings.
Forest Electronic Developments - Specialize in PIC and Atmel AVR programmers and software, including assemblers, C compilers and more all at reasonable prices.
Foster Transformer Company - Manufacturers of standard stock and custom wound transformers, power supplies, solenoids & other magnetic components.
FTDI - Manufacturers of USB to serial interface chips, ideal for easy implementation of USB interfaces in new and existing designs.
Greenweld - Greenweld is under new ownership and is up and running again. They stock surplus stock as well as some new items. Their website now includes their full catalogue complete with online ordering.
Henry's Audio Electronics - As the name suggests they sell audio equipment as well as disco lighting etc.
Kanda - Electronic kits, programmers, debuggers, chips, training and more.
Labtronix - UK suppliers of a variety of test, measurement & soldering equipment.
LC-LED - Online supplier of LEDs including high brightness types, LED light fixtures and LED displays.
Mable Audio - Chinese stockist of audio conmponents including tubes, sockets, pots, chassis, handles and lots more.
Maplin Electronics - Component and consumer electronics retailer with stores throughout the UK and mail order facilities. Reasonable range of most basic components.
MEGA Electronics - Manufacturers of PCB making equipment, chemicals and materials. Also manufacture printing equipment for panels, PCBs etc.
Microchip - Manufacturers of the PIC microcontroller, being used more and more to replace a whole board of components with one chip and some software. Their site contains info. on all the devices, datasheets, free software to download such as the MPLAB package and MPASM assembler, enthusiasts pages, links and more.
Modtronix - Sell PIC based single board computers (SBCs) and peripheral boards.
netCOMPONENTS - Component sourcing of billions of parts from hundreds of suppliers. Multilingual site includes demos of integrated circuits, and many other components.
Northern Connectors - Specialist distributor of a wide range of industrial connectors & components.
OpAmp-Electronics - Online store selling components and kits of assorted parts. Site also has electronics tutorials and theory, message board, projects and puzzles.
Parallax - Manufacturers of BASIC STAMP microcontrollers. Their site also contains more useful information on PIC microcontrollers, including many application notes on issues such as sending and receiving serial data using a PIC, and much more. Definitely worth a look if you are into microcontrollers.
ProActive Components - US suppliers of obselete, hard-to-find or long-lead-time millitary and commercial components.
Proto-PIC - Online UK store selling a wide selection of components and products, including those from SchmartBoard, Sparkfun, Microchip and CrownHill Associates.
Quasar Electronics - Vast range of kits, tools and much more. Kits range from beginner level to advanced.
RadioClassifieds.co.uk - Buy, sell and swap amateur radio equipment.
Rapid Electronics - Suppliers of electronic components, electrical equipment, tools and educational supplies. More than 50,000 products available online with free UK mainland delivery on orders over £30 ex VAT, same day despatch and no minimum order value.
RS - Large product range (Over 110,000 products!). Register on their site to access the online catalogue and datasheet library.
RSH Electronics - UK & international supplier of electronic components and kits. Low postage costs, over 1200 items.
Sir-Kit Electronics - Modular electronics kits aimed at GCSE physics, technology and electronics students. Site also contains some useful general tips for both students and teachers. Well worth a look.
Stuart of Reading - Suppliers of used and surplus test equipment. Large stock including oscilloscopes, power suppliers, meters and much more. Website includes stock list.
TekNet Electronics - Electronic test equipment sales. Range includes equipment from Tektronix, Fluke & HP.
West Coast Magnetics - US company manufacturing transformers, chokes and inductors. Site includes datasheets and online store.
ZD Integrated Circuits - Electronic component distributor. Web site includes real-time stock search facilities.