Model 200 RAM: Difference between revisions
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::(1) 1uF ceramic capacitor, 0805 package | ::(1) 1uF ceramic capacitor, 0805 package | ||
::(29) round pins | ::(29) round pins | ||
This is enough parts to build 3 boards, because you can't order less than 3 PCBs from OSHPark anyway. But you only need 1 board total per Model 200. The single new board takes the place of both ram sockets. You can reduce the parts quantities in the DigiKey order. | This is enough parts to build 3 boards, because you can't order less than 3 PCBs from OSHPark anyway. But you only need 1 board total per Model 200. The single new board takes the place of both ram sockets. You can reduce the parts quantities in the DigiKey order. | ||
There will be a few unused pins left over. The order is for 3 sticks of 32 pins each. You will break away and use 14 + 14 + 1 pins from 1 stick for each ram module. | There will be a few unused pins left over. The order is for 3 sticks of 32 pins each. You will break away and use 14 + 14 + 1 pins from 1 stick for each ram module. | ||
[https://photos.app.goo.gl/g1G4bo6FbjJSgcqU2 Pictures] | |||
[[File:200_ram_sa_1.jpg|200px]] | |||
[[File:200_ram_sa_2.jpg|200px]] | |||
[[File:200_ram_sa_3.jpg|200px]] | |||
[[File:200_ram_sa_4.jpg|200px]] | |||
Revision as of 06:15, 3 November 2017
- (1) TC551001 128kB SRAM TSOP32 package
- (1) 74AHC1G08 5-pin AND gate
- (1) 1uF ceramic capacitor, 0805 package
- (29) round pins
This is enough parts to build 3 boards, because you can't order less than 3 PCBs from OSHPark anyway. But you only need 1 board total per Model 200. The single new board takes the place of both ram sockets. You can reduce the parts quantities in the DigiKey order.
There will be a few unused pins left over. The order is for 3 sticks of 32 pins each. You will break away and use 14 + 14 + 1 pins from 1 stick for each ram module.
