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Clocks
Clocks: Ross: H95 or HN95 (?)
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Size (approx): |
140mm
x 75mm x 85mm (w,h,d) |
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Power: |
Mains powered: 230V 50Hz through a permanently fixed mains cable. 9V (1 x PP3) battery back-up accessed from underneath, to the left. | |
| Case: | Two-piece white plastic gloss-finished case with rounded edges. Inset flush display panel; red plastic, internally painted black and externally painted white text and red line. | |
| Display: |
3 1/2 digit red LED (15mm high) clock. Static colon. Alarm On an PM indicators. |
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| Features: | Simple functions for setting time and alarm time by the minute and hour. Snooze button gives a multi-use 9 minute delay. Toggle switch on the back (left) to enable alarm. Alarm is a medium frequency (900 Hz) pulsed buzz. | |
| Age: | 1995 | |
| Manufacturer: | Ross, made in China. Serial number 33/95/06152 is on a sticker on the inside of the battery compartment along with another stating H95. Other stickers have the reference number RLER 04. | |
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Comments:
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Odd but pleasing upright design though the alarm is rather quiet (not helped by being mounted on the base) and the nine-minute snooze delay is a rather odd number. I think this looks quite retro - even for its time - more like a 70s design. Quite a lot of components for its late date. The chip used has a 12/24 hour display, radio switch on control and power fail display mode which is not used on this model. It also has a sleep timer mode; also not used. |
| Components: | 1 x clock IC: Texas TMS3450NL
M9519
(week 19 of 1995), 28 pin DIL, 400mil width 1 x LED display module: 655 SHAN 0 x transistors 5 x diodes 3 x capacitors 7 x resistors 1 x buzzer (mounted on base) 1 x miniature mains transformer (mounted on base) |
| Boards: | Switch board is fixed to the upper case section and has one diode. This has a four-way ribbon cable to the main board (H HN95 K23C); this is loose and connected to the display board via a 30-way ribbon cable and one loose wire. Display board is held in place by plastic guides. |
| Construction: | Remove the two screws on the underside of the case and the top will lift away easily. |
| Logic comments: | To set the time, press the (TIME) key and simultaneously press either the (Hour) or (Min) key to increment the value |
| To set the alarm time, press the (ALARM) key and simultaneously press either the (Hour) or (Min) key to increment the value | |
| When doing this you van use multiple presses of the keys or hold and let increment | |
| Alarm on/off toggle switch is on the rear. | |
| Suitably large (SNOOZE) key gives a nine minute delay to the alarm |
