Sharp EL-640 (VOICE SYNTHESIZED CLOCK & CALCULATOR)
The Sharp EL-640 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 26 keys, and an LCD (liquid crystal) display. The power source is 4xAA batteries. Note: time
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 5 |
| Keys | 26 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | LCD |
| Length | 154mm |
| Width | 77mm |
| Thickness | 20mm |
| Power Source | 4xAA batteries |
| Year introduced | 1978 |
Replacements:
If you have a Sharp EL-640 that is no longer working, you can first try replacing the 4xAA batteries. 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: