Se encontraron 5 coincidencias

por redhawk668
21 May 2018, 01:38
Foro: Preguntas y peticiones / Questions and requests
Tema: Memory problems with ZX Uno.
Respuestas: 4
Vistas: 1372

Re: Memory problems with ZX Uno.

My ZX Uno is working 100% now, thanks for the help. I’ve replaced the IDT SRAM with an ISSI SRAM.
por redhawk668
15 May 2018, 10:18
Foro: Preguntas y peticiones / Questions and requests
Tema: Memory problems with ZX Uno.
Respuestas: 4
Vistas: 1372

Re: Memory problems with ZX Uno.

I have ordered some ISSI 512KB SRAM chips, so I'm going to replace the IDT chip. I've tested the T24 core and it has even worse results, so I guess the IDT chip is not quite compatible with the ZX Uno. The ones I've ordered are IS61L5128AL-10TLI, so that means 512KBx8, 10ns and 3,3 volt supply volta...
por redhawk668
14 May 2018, 23:05
Foro: Preguntas y peticiones / Questions and requests
Tema: Memory problems with ZX Uno.
Respuestas: 4
Vistas: 1372

Memory problems with ZX Uno.

Hello There, I've built a ZX Uno 4.1 from scratch and at the first test the FPGA was found and I could program the SPI flash and run some cores on it. So far so good, the problem is with the memory. I have soldered a IDT SRAM chip, type 71V424S10PHG. When powering up my ZX Uno it says 512K Ok, when ...
por redhawk668
09 Abr 2018, 22:54
Foro: Tecnología
Tema: Magnetic Beads...
Respuestas: 2
Vistas: 1237

Re: Magnetic Beads...

I found ferrite beads at AliExpress, they are high current and the right value. I did had to order a whole bunch of them, but let’s say they were dirt cheap :D .
por redhawk668
06 Abr 2018, 15:41
Foro: Tecnología
Tema: Magnetic Beads...
Respuestas: 2
Vistas: 1237

Magnetic Beads...

Hello There, I want to build a ZX Uno myself and I have studied the BOM on the site. I can get most of the components at Digikey and for the components that are now obsolete at Digikey I have found alternatives. But, what I can't find are the SMD 0805 1K 3A magnetic beads. These are, correct me if I...

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