Pozeral som do datasheetu k NM27C64 a je tam toto:
The recommended erasure procedure for the NMC27C64 is exposure to short wave ultraviolet light which has a wavelength of 2537 Angstroms (&#197
Ta LEDka ma maximum intenzity pri 400nm a pri 250 je tam velka nula. Chcelo by to nieco trochu ine - trochu pohladam...
Tym horskym slnkom by to mozno islo, ale asi by som to upiekol skor ako vymazal (tusim nejde zapnut samostatne len UV).