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Calculators: Handheld: Canon LD-8M 2 (Palmtronic)
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Size (approx): |
74mm
x 130mm x 21mm (max) (w,h,d) Weight 114g excluding batteries |
| Power: | 3.0V DC, 2 x AA size batteries. Accepts an adapter/charger (DC 3V, 0.2W) through a socket on the top side, on the far left. The on/off switch is on the left hand side, in line with the Canon sticker. | ||
| Case: | Lightweight calculator made from a two-piece patterned and glossy black plastic case. The oversized green plastic display filter is flat and raised slightly. Within this a black printed metallic gold sticker sits in its own recess with the brand and model number. The keyboard surround is a brushed aluminium panel that wraps around the bottom edge. The familiar Canon blue and yellow keys are medium travel with a soft click and work quite well. | ||
| Display: | 8 digit green VFD with a ninth digit for negative, overflow and memory indication | ||
| Features: | Standard four functions with percentages, square root and four-function memory. | ||
| Age: | 1975 | ||
| Manufacturer: | Canon Inc, made in Japan, serial number 643999. | ||
| Comments: | Basic calculator with a bright if small display. The logic is quite good, only let down by the lack of recovery. Original case is soft black plastic with an open top and half-moon cut-outs front and back. It has Canon embossed on the front and Japan on the back. |
| Components: | 1x cpu: Hitachi HD36264 5K13 (October
1975) 28 pin DIL, 0.6" width black plastic 1 x 9 digit VFD: single tube round front face: Futaba 9-CT-24, 5J (September 1975) 2 x transistors 5 x diodes 8 x capacitors 3 x resistors 2 x resistor array 1 x transformer: TDK CD1013 Japan |
| Boards: | The main cpu board (Canon X67-6481-02) floats free, attached to the keyboard assembly which is fixed to the front with a screw and plastic lugs. The two are joined by 20 strong copper wires. There is an additional piggy-back board with the power supply components on it. |
| Construction: | Held together by internal lugs only you have to be careful not to damage the calculator trying to open it. The best way I found is by squeezing in the front section along the sides and top. Eventually the back will lift off. |
| Logic comments: | The (CI) key is used to cancel the last number entered whilst the (C) key clears the whole calculator |
| Input overflow is suppressed, inputting a ninth digit is ignored | |
| There is automatic constant on multiply and divide only | |
| Overflow shows the result and “E” in the far left (ninth) digit and is not recoverable | |
| Divide by zero shows zero and “E” in the far left (ninth) digit and is not recoverable | |
| Negative numbers are shown with a "-" in the far left (ninth) digit thereby allowing full eight digit negative numbers | |
| Square roots of negative numbers are not allowed and show the result with “E” in the far left (ninth) digit and is not recoverable | |
| Memory store is indicated by “II” in the far left (ninth) digit |
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