lampmerchant
GitHub
commit
20f9b1bc2c
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@ -1,2 +1,8 @@
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## v1.2
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- moved the LEDs a little outward to better fit the new panels
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## v1.1
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- fixed R2 silkscreen
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## v1.0
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- Initial public release
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@ -21,7 +21,7 @@ Here is the BOM for the main board. Part number are what was tested on prototype
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| R1, R3, R5, R8 | 1200Ω | 4 | standard 0.25W carbon film resistor | TRU TC-CFR0W4J0122 |
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| R2, R4, R6 | 2200Ω | 3 | standard 0.25W carbon film resistor | TRU TC-CFR0W4J0222 |
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| R7, R9, R12, R13, R14 | 10kΩ | 5 | standard 0.25W carbon film resistor | TRU TC-CFR0W4J0103 |
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| U1 | PIC16F1825 | 1 | PIC 8-bit Microcontroller (DIP-14) | PIC16F1825-I/P |
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| U1 | PIC16F1704 | 1 | PIC 8-bit Microcontroller (DIP-14) | PIC16F1704-I/P |
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| U2 | 74ACT08 | 1 | Quad TTL 2-Input AND Gate | SN74ACT08N |
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| U3 | 3.3V LDO | 1 | 3.3V LDO voltage regulator | MCP1700-3302E/TO |
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@ -47,20 +47,24 @@ This is a matching board for TashTwenty. Please use this one to avoid any damage
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### BOM (external links)
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Here is a mouser link (without the case):
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- https://www.mouser.fr/ProjectManager/ProjectDetail.aspx?AccessID=13c3076e24
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- https://www.mouser.fr/ProjectManager/ProjectDetail.aspx?AccessID=4e3ee30a16
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Here us a digikey (without the case):
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- https://www.digikey.com/short/n4d8tf04
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### IDC cable
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You need a cable to connect both boards
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Any straight IDC-20 cable should work (pin 1 to pin 1, etc). Macintosh floppy cables are compatible. We used a Quadra 800 cable for prototyping (Apple P/N 590-0862-B).
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Any straight IDC-20 cable should work (pin 1 to pin 1, etc). Macintosh floppy cables are compatible. We used a few Apple cables for prototyping:
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- Quadra 800 (Apple P/N 590-0862-B)
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- PowerMac 7200-7600 (Apple P/N 590-4529-A)
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If you are looking for a new one, a compatible assembly is made buy Advantech under the part number PCL-10120-1E.
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## PCBs
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the PCBs are simple 2 layers boards. The gerbers are avaible in the release section.
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Check for the following files:
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* TTT_11.zip: main board revision 1.1
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* TTT_12.zip: main board revision 1.2
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* DB19_IDC20.zip: adapter board revision 1.0
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You should be use any mainstream PCB manufacturer for theses. Nothing special about them. PCB thickness should FR-4 with a 1.6mm thickness
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File diff suppressed because it is too large
Load Diff
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@ -5,8 +5,8 @@ $Descr A4 11693 8268
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encoding utf-8
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Sheet 1 3
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Title "TashTwenty Tiny"
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Date "2022-05-21"
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Rev "1.1"
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Date "2022-06-06"
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Rev "1.2"
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Comp "Lostwave"
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Comment1 "https://68kmla.org"
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Comment2 "https://68kmla.org/bb/index.php?threads/tashtwenty-single-chip-dcd-hard-disk-20-interface.39357/"
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@ -441,4 +441,6 @@ Wire Wire Line
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9850 6000 9850 5600
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Wire Wire Line
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9850 5600 9750 5600
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Text Notes 4300 6350 0 50 ~ 0
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PIC1704 is now recommended.\nPIC1825 still supported.
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$EndSCHEMATC
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