Long ago, fountain pens had a hollow body to store ink, and you used an eyedropper to fill the tube up with ink from a bottle. Some still do. Many others started using various different mechanisms for filling, with levers, pistons, and even extendable tubes to dip into the bottle.
Time for a bit of shameless self-promotion…
If you’re looking for a site with expert opinions on the latest in guitar technology, expert advice on technique and in-depth information on every guitar maker on the planet, then, er… Guitar Pr0n might not be the site for you.
If, however, you enjoy looking at guitars and guitarists doing their thing, then Guitar Pr0n might just entertain you for a little while.
Time for our second guest post – this is another one written by my dad, for use when he’s teaching digital photography courses. I’ve done a bit of editing to bring it up to date, so any typos are probably my fault…
Digital cameras are totally dependant on a source of electrical power and the more facilities and functions that a camera has, the more electrical power it will require.
Web cams may contain batteries so that they can function away from the computer but are more likely to draw their power from the USB socket.
At the cheaper end of the digital camera market, many cameras take AA or AAA batteries; these can be non-rechargeable or rechargeable but check your cameraâ€™s manual as to what types are advised (rechargeable batteries deliver a slightly lower voltage and some cameras may not work with them – almost all do now, but it’s worth checking).
Non-rechargeable types are either zinc carbon (cheap but with little staying power) or alkaline batteries which will deliver a higher current, when required, and work for longer. Always carry a spare set although they are widely available provided you are close to a suitable shop.