National Semiconductor 500 (NS500)
The National Semiconductor 500 is an arithmetic calculator with 12 digits precision and algebraic logic. It has 5 functions, 26 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA sealed.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 5 |
| Keys | 26 |
| Precision | 12 |
| Logic | Algebraic |
| Display type | VFD |
| Printer | Yes |
| Length | 168mm |
| Width | 72mm |
| Thickness | 37mm |
| Power Consumption | 2.500000W |
| Power Source | 4xAA sealed |
| Year introduced | 1979 |
| Year discontinued | 1981 |
Replacements:
If you have a National Semiconductor 500 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: