Reading memory locations in a 2716 EPROM (Erasable Programmable Read Only Memory). Erasing the EPROM using Ultraviolet light. Programming the EPROM using primitive (and frankly disreputable) techniques. Damaging the EPROM, but restoring its data in the process? Weird day ๐
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I did write my 1st bit onto EEPROM i had an old computer power supply that had 24V output i was scared cz amps are high but somehow i manage to write it thanks for such awesome tutorial
These are great, thank you for doing this.
Yea yhea
Wrong panties.
where did you get those convenient leds with resistor legs? or did you make them yourself?
Hi
Eprom ic tm2764 vpp is 21v
What are replacement for this ic vpp 13v?
May i know brother?
Einstein's photoelectric effect causes the UV photon energy to be transferred to the trapped electrons. This gives them the energy needed to escape the trap and to be conducted by surrounding Si to ground. It is not necessary to remove every single electron from the trap in order for the circuitry to detect a 1 rather than a zero when the circuitry is configured correctly. By replacing the diode with open circuit, you have configured the circuitry incorrectly so that the few remaining electrons in the trap (i.e. floating gate) now are detected as 0 instead. In this mode ones will often be seen as zero if only a few electrons have found their way onto the floating gate… the data read will not be reliable and there is a possibility that floating this pin while using the chip will enhance the electron flow into the floating gates. This does give the possibility of recovering most of the data from a chip that was erased accidentally, however, but I believe the read rates will be low.
Given I=C dV/dt, I=30 mA, and dV=2 V, you can choose C to give dt=50 ms. This is less precise than a programmer and yet far more reliable than touching wires together. Vary C to improve performance and don't forget a parallel bleed resistor (~50 k) to reset the capacitor.
Ok
Thank you so much for this video, because Iโve been using an eprom and trying to figure out how it works, and this has helped a lot
Hello,how can i rise the miniPro programming voltage to 25v? The programmer has a 21v max voltage,i have to add the 4volts with a external supply or battery ,or pull out the pin and feed 25v from external supply?is time sensitive?edit: i pulled out the vpp pin and applied by hand 25V till the end, and it works! (on the miniPro)thank you.
Can i programm an eprom mbm27C2564a with Arduino please ?
very educative video
Why did he use a resistor to pull down CE? Couldnt you just use a 0 Ohm/Jumper?
what is that board called that he has the eprom chip in? the white one?
๐ I've learnt more reading the comments for this video than from the all the other reading I've done on the subject over the last couple of days.