Royal Digital 5
The Royal Digital 5 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, and a VFD (vacuum fluorescent) display. The power source is 4xAA sealed.
The calculator was manufactured in Japan for the Imperial Typewriter Company Limited (Leciester, England). This calculator can actually store up to 88 digits, although only 8 are visible. This allows the unit to be used to multiply large numbers using a crude form of floating point arithmetic. A further quirk of the logic is that trailing zeros are not suppressed and always visible.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 5 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 150mm |
| Width | 88mm |
| Thickness | 35mm |
| Power Source | 4xAA sealed |
| Year introduced | 1972 |
| Year discontinued | 1972 |
Replacements:
If you have a Royal Digital 5 that is no longer working, you can first try replacing the 4xAA sealed. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: