Royal Digital IV
The Royal Digital IV is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 18 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 6xAA sealed. Note: Uses circuit board contacts and electrical stylus, like the Stylophone electronic organ.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 5 |
| Keys | 18 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | LED |
| Length | 165mm |
| Width | 81mm |
| Thickness | 39mm |
| Power Consumption | 1.800000W |
| Power Source | 6xAA sealed |
| Year introduced | 1972 |
| Year discontinued | 1972 |
Replacements:
If you have a Royal Digital IV that is no longer working, you can first try replacing the 6xAA 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: