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HP 82240: Difference between revisions
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The printer is powered by four AA batteries and can accept alkaline or NiMH cells. External power is supplied via a common nonpolar 5.5mm/2.1mm AC jack. The manual calls for 9-12V AC or DC at 500-1500mA and thus can be used with most common barrel jack power supplies. The original power adapter HP 82241A is rated for 9V AC at 13.5VA. The printer works on either internal, external or a combination of both. It is rated for 6000 lines of print on fresh sets of internal batteries. | The printer is powered by four AA batteries and can accept alkaline or NiMH cells. External power is supplied via a common nonpolar 5.5mm/2.1mm AC jack. The manual calls for 9-12V AC or DC at 500-1500mA and thus can be used with most common barrel jack power supplies. The original power adapter HP 82241A is rated for 9V AC at 13.5VA. The printer works on either internal, external or a combination of both. It is rated for 6000 lines of print on fresh sets of internal batteries. | ||
The IR receiver diode is mounted to the bottom left of the printer when viewed from the top, hidden behind an IR window. Printing distance is dependent on background IR levels, with correspondingly shorter range under incandescent fixtures or in sunlight. It is usually possible to print at 15cm or more when the IR diode is in field of view indoor. | The printhead is of a dot-matrix type that can be directly addressed in graphics mode. When printing characters, each row is 24 (single width) characters long, with each character taking up 7x8 pixels (5 out of 7 columns are actually occupied, the outermost columns are always left blank). On each line, the leading and trailing columns are skipped. When used in graphics mode, this translates to a resolution of 166x8 per line. | ||
On calculators that allow sending hex values directly to IR, it is possible to have a finer control of many aspects of printing. For example, double-width and single width can be toggled, underlining text can be done, and finally on the B variant, the character sets can be switched. | |||
The IR receiver diode is mounted to the bottom left of the printer when viewed from the top, hidden behind an IR window. It is most sensitive to 940nm infrared light. Printing distance is dependent on background IR levels, with correspondingly shorter range under incandescent fixtures or in sunlight. It is usually possible to print at 15cm or more when the IR diode is in field of view indoor. | |||
The printer was designed with a 200 bytes buffer, and as it is only set up to receive information, it is up to the controlling device to ensure long printouts does not cause an overflow. Maximum time to print a line is roughly 1.2 seconds with AC and 1.8 seconds without, accounting for the movement of print head, thus 1.8 seconds is usually set as the default DELAY value on calculators. | The printer was designed with a 200 bytes buffer, and as it is only set up to receive information, it is up to the controlling device to ensure long printouts does not cause an overflow. Maximum time to print a line is roughly 1.2 seconds with AC and 1.8 seconds without, accounting for the movement of print head, thus 1.8 seconds is usually set as the default DELAY value on calculators. | ||
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==Compatible 3rd party printers== | ==Compatible 3rd party printers== | ||
Due to the widespread adoption of HP 82240 in various industries, other manufacturers are known to have designed compatible, or partially compatible devices. Today some of these are still in production or can be easily found second hand at much cheaper prices. | Due to the widespread adoption of HP 82240 in various industries, other manufacturers are known to have designed compatible, or partially compatible devices. Today some of these are still in production or can be easily found second hand at much cheaper prices. | ||
However, some of these 3rd party calculators, either does not have any HP 82240 modes other than text or uses a different hex sequence to trigger said modes. Some of these issues can be worked around with custom printing code on HP48 and later, others can't. Wherever possible, known incompatibility are noted, and the reader is advised to choose carefully according to their needs. | |||
{| class="wikitable" | |||
|+Known 82240 Compatibles | |||
!Brand | |||
!Model | |||
!Compatibility | |||
!Notes | |||
|- | |||
|Martel | |||
|MCP 8850B | |||
|Complete | |||
| | |||
|- | |||
|Testo | |||
|0554.0545 | |||
0554.0547 | |||
0554.0549 | |||
|No graphics mode or incompatible hex control signal | |||
| | |||
|- | |||
|Wohler | |||
|TD600, TD23 | |||
|Unknown | |||
| | |||
|- | |||
|Rothmberger | |||
|6.1052 | |||
|Unknown | |||
| | |||
|- | |||
|Tecnocontrol | |||
|SPRINT-B | |||
|Unknown | |||
| | |||
|} | |||
Additionally, many printers are advertised as "HP 82240 compatible" online. In that case, always consult the instruction manual or technical documentation, or ideally request a sample / bring calculators to point of sale to test. | |||
==External resources== | ==External resources== | ||