Resistor pack array question

revaldinho / cpc_ram_expansion

A series of Amstrad CPC PCBs including a backplane, ROM and 512K and 1MByte RAM expansions.

GNU General Public License v3.0

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Resistor pack array question #10

Closed rapiqui closed 4 years ago

rapiqui commented 4 years ago

Hi,

Could you please specify which is the value of the resistor pack array and the type (f.ex.: 9 pin + gnd).

I've been unable to figure it out.

Thanks!

revaldinho commented 4 years ago

Thank you for your question.

Several of the projects in this repository use resistor packs. Which one are you building ?

rapiqui commented 4 years ago

Hi @revaldinho,

Thanks for your swift reply. It's the Amstrad Universal RAM Expansion 512k.

revaldinho commented 4 years ago

For these two components, see the PCB netlist.

r6k8_sil5 sil0 ( .common(VSS), .p0(dip0), .p1(dip1), .p2(HIADR3), .p3(HIADR4), ); r3k3_sil5 sil1 ( .common(VDD), .p0(dip3_pu), .p1(dip2_pu), .p2(dip1_pu), .p3(dip0_pu), );

The first is a 6K8 pack and the second a 3K3. I didn't find any 5 pin arrays for the 6K8 when I ordered from Digi-Key so I used a 6 pin one and snipped off the last array leg. No problem finding 5 pin packs for the 3K3.

rapiqui commented 4 years ago

Thanks,

Now is crystal clear ;)

revaldinho commented 4 years ago

You're welcome. I'll close the issue now.

thanks