A review of the HewlettPackard HP 82240A printer

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This is the Hewlett-Packard (HP) 82240A thermal printer. It's a wireless, infrared thermal printer for HP programmable and graphing calculators (HP 17, 19, 28, 41, 42, and 48, among others, as well as the WP-34S with IR emitter mod). The range is over a foot and a half from the calculator, provided no interference with the IR path! It also works with the palmtops, but not with IR ports on PCs. It uses the special RedEye communication protocol, not the standard IrDA or SIR protocols used on the LX palmtops, PCs, and older PDAs. • • It prints either text (24 characters per line, 2.5 lines per second) or graphics (166 pixels wide). It is great for printing program listings, program output, and graphs, if this is used with a graphing calculator. It also has control sequences to underline or expand text, in addition to some simple printer controls, such as advancing paper. It uses standard 2 1/4 thermal paper and runs on either 4 AA batteries or AC adapter (HP 82241A or F1011A, although the 82241A seems to be preferred). • • The newer 82240B also has an extended character set, improved power management through automatic shutoff after 10 minutes idle, a power on LED, and a different color indicator in the power switch. • • The front controls, from left to right, are a power switch, contrast adjustment slider, and paper advance. • • Here's how you do a self-test: first, turn off the printer. Then hold the paper advance button and switch on the printer. Release the paper advance button and let the self-test be printed. The self-test shows the character set of the printer and the current battery level, which is quite high given I am using the AC adapter! Then you can advance the paper and cut along the plastic edge. • For more information, take a look at these pages: • https://www.keesvandersanden.nl/calcu... • https://commerce.hpcalc.org/82240b.php • https://hackaday.io/project/25616-hp-... • For a full list of compatible calculators, take a look at this post: • https://www.hpmuseum.org/forum/archiv... • Recorded with my Nikon D3100 DSLR. It's also my first scripted YouTube video!

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