AT28C16 EEPROM learning experiments

[_q12x_]

Thanks to mister @marconi , I received his chip AT28C16 gift from England !
I will start to make the 5x7 led matrix project that you did.
I will make it alone as much as I can (as usual). And I will ask you for clarifications on the way.

 

[marconi]

That is good news. You will find this eeprom easy to program and use. It has enough memory for it to contain several sets of code each set being for its own project. Just move the chip from one board to another and arrange for each board to address its set of code. The eeprom has 2exp11 x eight bit memory locations.

The first task is to construct a programmer similar to the one I showed you on YouTube.

 

[_q12x_]

The first task is to construct a programmer similar to the one I showed you on YouTube.

Quite right !!! I almost forget about it. A mini-project in itself.

 

[marconi]

Hello. Please let me know if you have the components to make the programmer. If you wish we can construct it in stages which I will detail to you.

 

[_q12x_]

Hello mister @marconi
Just today I stay over the circuit from Ben Eater , and I made it and it works ! Youhoo.
Im happy because it didnt work from the first try. And I had to spend some hours looking like an idiot to the absolutely correct wiring and not understanding why is not working. I solved the --blody-- puzzle realizing that the LED's I was using were the SuperBright White ones. So in the moment I switch them with an older type of colored LED, everything worked like a charm. I have the exact same circuit as Ben has in its video. What a road... uuuh. I thought for a momment I am completely stupid.

 

[_q12x_]

Yesterday I stay and made the actual circuit. Here it is for others to see/use:

 

[_q12x_]

I will start to use the LED Matrix later today.
I will probably stay and draw the special pins this components has and the proper wiring... hmmm
or more experimentation. It will take time to do it alone. But I will do it.

 

[_q12x_]

Is definitely a pleasure to work with this EEPROM, for sure. Its SOoooooooooo easy. Compared to my SRAM, is a breeze in the wind.

 

[_q12x_]

I wonder what EEPROMs are out there, SMD/DIP versions, the most popular, the CHEAPEST and the more quantity of them that can be bought.
- I want 100 EEPROMs, for under 10$ - doesnt matter from what e-market or what size/package they have. Haha. But seriously, give it a look.

 

[marconi]

I found it useful to practice programming the eeprom in order to learn the routine. I made mistakes some of which I thought would damage the input/output circuits but they seem quite robust though I would not rely on that.

 

[_q12x_]

I know you like my movies :

 

[_q12x_]

When you can, provide me with your schematic of the EEPROM + led matrix.
Thank you.

 

[marconi]

Why not simply use the proteus circuit you tested earlier?

 

[_q12x_]

Because now I am building in reality. You will get it.

 

[marconi]

I meant why not use the proteus circuit as your blueprint to build it in reality.

It is up to you but there are fewer programming iterations for the letters, numbers and symbols you wish to display if you scan column by column ie you will programme for each 5 memory locations whereas if you scan row/line by row/line you will have to programme 7 memory locations.