- 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 - Design & Manufacturing
ChipXRef - Online chip cross reference. Includes advanced search facilities to easily locate the information you need.
Compact Control Design Ltd - UK company offering electronic design services and off-the-shelf control, data acquisition and monitoring products.
Datasheet Archive - Archive of over 6 million electronic component datasheets.
DatasheetDir.com - Search engine for electronic component datasheets.
DatasheetDirect - Online library of free downloadable datasheets.
DC Power Supply Directory - US site with links to loads of resources related to power supplies - suppliers, circuits, guides and more.
Elexol Electronic Solutions- Designers and manufactures of USB and I/O development boards, modules and accessories. Includes DIL modules using the FTDI chipset.
Express PCB - PCB manufacturing service with fast delivery and free schematic / PCB software to allow easy online ordering.
Garner Osborne PCBs - UK manufacturers of PCBs offering 24 hour to 10 day turn-around times as well as prototype design and assembly services.
GN Systems - Based in Bolton, UK offering electronic design and assembly including PIC development and programming. ISO9002 certified.
Kingfield Electronics - Contract manufacturing assembly and test of PCBs and complete systems.
MEC - Company offering electronic design, PCB design, layout, assembly & test services.
MicroST - Italian company offering electronic design & consulting services. Site includes articles and tutorials.
PCB Pool - Low cost PCB & laser stencil manufacturing. Orders are combined onto a single panel for manufacturing to reduce costs and set-up charges. Highly recommended, especially for small quantities / protypes.
Pad2Pad.com - PCB manufacture and assembly. Site includes free software allowing boards to be designed and directly ordered online.
Partminer - Provides access to the partminer CAPS database, covering over 67 million components. Includes downloadable datasheets, and RoHS white papers. Company also provides follow-up research & purchase services for wholesale customers.
Quantum CAD - UK company offering electronic and PCB design services, fabrication and assembly, consultancy, training and other services.
Speedy PCB - US company offering rigid and flexible PCB manufacture up to 20 layers. Site includes online quotation request form.
Datasheet Zone & DrawSCH - DrawSCH is an online application to create schematics in your browser, without needing to install any software. Site also includes a datasheet archive.