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Tag: dot

Viewing Spectral Lines in Discharge, Other Colours in Output

For accurate measurements, you’ll need an optical instrument such as a monochromator or spectrophotometer or optical spectrum analyzer. But to simply see the complexity of the discharge spectrum inside the bore of a He-Ne laser tube, it’s much easier and cheaper. (Spectra for various elements and compounds can be easily

Continue readingViewing Spectral Lines in Discharge, Other Colours in Output

Cat Links Consumer Gear

Brother P-Touch 80 Label Maker

Posted on March 12, 2011September 17, 2011 The Engineer

Here is a label maker, bought on offer at Maplin Electronics. Full Qwerty keyboard with 1 line dot matrix LCD display visible here. Power is 4 AAA cells or a 6v DC Adaptor. Rear cover removed. Battery compartment is on the left hand side, space for the tape cartridge on

Continue readingBrother P-Touch 80 Label Maker

Cat Links Consumer Gear

Garmin eTrex

Posted on February 20, 2011February 10, 2011 The Engineer

Pocket sized GPS navigator. Here is shown the greyscale dot matrix LCD. Serial interface on the back of the unit. Pinout from left is +3v, Rx, Tx, GND. PCB Removed from the casing. RTC backup battery in the centre of board, CPU & flash ROM on the left. GPS chipset

Continue readingGarmin eTrex

Cat Links Consumer Gear

Co-Op Bank Card Reader

Posted on October 20, 2010 The Engineer

This is a little security measure you get with Internet Banking with the Co-Op, generates codes to confirm your identity using your bank card. About the size of a pocket calculator, this is the keypad & screen. The rear of the unit, the card slots into the top, manufactured by

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Cat Links Consumer Gear

Ericsson GA628

Posted on August 25, 2010 The Engineer

Here is a phone from the mid 90s, the Ericsson GA628. Here visible is the front of the unit with keypad, & single line monochrome LCD for number display. Here the battery is removed from the phone, showing the SIM card socket. At the top under the antenna stub is

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  • Helium Neon Lasers
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    • Wavelengths, Beam Characteristics
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    • Viewing Spectral Lines in Discharge, Other Colours in Output
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