To use your business computers effectively, you are likely to purchase a variety of accessories.
This briefing covers:
- Digital cameras.
1 Types of printer
Of all your computer accessories, a printer is the one you are likely to use most often.
1.1 Laser printers are best for text, large print volumes and networked use.
- Even the cheapest laser printer will produce good quality, crisp printouts.
- Laser printers have low running costs and are best for most businesses (see 2).
1.2 Inkjet printers can produce vibrant colours and good photographs.
1.3 If you have unusual printing requirements you may require a different type of printer.
- Dot matrix printers are often used in warehouse and point-of-sale situations.
They are old-fashioned, but tolerate dirty or dusty conditions well.
- Plotters can be used to print banners, posters and signs at large sizes.
They generally use the same technology as inkjet printers, though are much more specialised and expensive.
2 Laser printers
Unless you need to print lots of photos, a laser printer is almost certainly the best option for your business.
2.1 When choosing a laser printer, speed is important, so consider how much printing you will be doing.
- Small laser printers are suitable for businesses with one to three people using them.
They print at around 16 pages per minute (ppm) and are designed to produce 1,000 to 5,000 pages per month.
- Heavy-duty lasers are suitable for larger networks.
Some laser printers are network-ready; others connect to a print server (see 2.5). These large laser machines will print up to 50ppm.
2.2 Even the cheapest laser printer will produce high quality text.
2.3 You also need to consider whether you need to print in colour.
- Colour laser printers are more expensive than mono (black and white) ones, but still affordable.
A colour laser is the most effective way to do large volumes of colour printing.
- Most colour lasers will produce acceptable quality.
For text, look for at least 600dpi resolution. For photos, look for 1200dpi or more and view test prints to check colour accuracy.
- Colour printing also costs more per page.
- For occasional colour printing, you can supplement a mono laser printer with a colour inkjet (see 3).
This can be more cost-effective because it discourages employees from printing in colour uneccessarily.
2.4 Paper handling is important if you print in reasonable volumes.
2.5 Unless you intend to use the printer with a single computer, you will need to connect the printer to your network.
- Some laser printers come with a network connection built in.
You can connect these directly to your network, so all your computers can share the printer.
- You do not need additional hardware to use one of these printers, but you need to install printer driver software onto each networked computer.
- If your printer does not have networking built in, you will need a print server.
This is a computer on your network which centralises print jobs.
- It’s generally easier for small businesses to buy a network printer, rather than having to set up a print server.
3 Inkjet printers
Inkjet printers are suitable for low volume or occasional printing. They produce excellent quality photographs.
3.1 Inkjets produce good quality text and excellent graphics.
3.2 Inkjet printers are most suited for use with a single computer.
- Print speeds are slower than laser printers.
- Running costs are higher, making inkjets unsuitable for medium and high-volume work.
3.3 Inkjets are cheap to buy, but calculate the running costs carefully.
A scanner allows you to convert printed documents into digital form.
4.1 A scanner works like a photocopier, but scans are stored on a computer rather than being copied onto paper.
The most common type of scanner is a flatbed scanner.
4.2 When choosing a scanner, consider how frequently you will be scanning documents.
4.3 The quality of scans is measured in dots per inch (dpi).
An all-in-one device combines several functions into one piece of hardware.
All-in-one devices typically include a printer, scanner and fax machine, as well as photocopying functions.
- They save space and usually work out cheaper than buying each device separately.
- However, you may only be able to use one function at a time.
- Remember that if the device breaks, you are likely to lose all functionality while it is being repaired or replaced.
The cost of all-in-one devices depending on their features and capacity.
5 Digital cameras
5.1 A digital camera allows you to take photographs and store them on a memory card.
5.2 The quality of photographs taken by a digital camera is expressed in megapixels (MP).
5.3 The other important item to consider is the camera’s zoom.
- A good zoom gives you more flexibility when taking photographs.
- Make sure the camera has an optical zoom. A digital zoom simply crops the image and blows it up, reducing the quality.
- Most compact cameras have at least a 3x zoom. A 16x or 24x zoom allows you to get very close to the action.
5.4 When budgeting for a camera, remember that you may require extras.
5.5 Smart phone cameras are very capable.
- Smart phones have excellent cameras built in. They can be as good as - or better than - many mid-range digital cameras.
- Unless you are taking photos for inclusion in brochures or other marketing materials. a smart phone may be all you need.
6.1 Projectors are used to display large images on a screen.
- You can connect them to your computer and use them for presentations.
- Some projectors can also be connected to DVD players and other sources of video.
6.2 A projector’s brightness is measured in ANSI lumens.
- The higher the number, the brighter the image.
- Look for 1,200 ANSI lumens for a projector that works well in a dim room, 2,000 for use in a normal office environment, and 3,000 for use in brighter light.
6.3 You should also check a projector’s resolution.
6.4 Make sure your projector has the correct input ports, so you can connect your laptop or other equipment.
- Most projectors use a DVI or HDMI port to connect to computers.
- Older projectors may use a VGA connection.
6.5 Test a projector before buying.