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Merge pull request #6 from demik/main

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PCB board rev 1.2
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lampmerchant 2022-06-06 14:11:11 -06:00 committed by GitHub
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6
pcb/TashTwenty Tiny/ChangeLog.md
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@ -1,2 +1,8 @@
## v1.2
- moved the LEDs a little outward to better fit the new panels
## v1.1
- fixed R2 silkscreen
## v1.0
- Initial public release

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pcb/TashTwenty Tiny/README.md
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@ -21,7 +21,7 @@ Here is the BOM for the main board. Part number are what was tested on prototype
| R1, R3, R5, R8 | 1200Ω | 4 | standard 0.25W carbon film resistor | TRU TC-CFR0W4J0122 |
| R2, R4, R6 | 2200Ω | 3 | standard 0.25W carbon film resistor | TRU TC-CFR0W4J0222 |
| R7, R9, R12, R13, R14 | 10kΩ | 5 | standard 0.25W carbon film resistor | TRU TC-CFR0W4J0103 |
| U1 | PIC16F1825 | 1 | PIC 8-bit Microcontroller (DIP-14) | PIC16F1825-I/P |
| U1 | PIC16F1704 | 1 | PIC 8-bit Microcontroller (DIP-14) | PIC16F1704-I/P |
| U2 | 74ACT08 | 1 | Quad TTL 2-Input AND Gate | SN74ACT08N |
| U3 | 3.3V LDO | 1 | 3.3V LDO voltage regulator | MCP1700-3302E/TO |
@ -47,20 +47,24 @@ This is a matching board for TashTwenty. Please use this one to avoid any damage
### BOM (external links)
Here is a mouser link (without the case):
- https://www.mouser.fr/ProjectManager/ProjectDetail.aspx?AccessID=13c3076e24
- https://www.mouser.fr/ProjectManager/ProjectDetail.aspx?AccessID=4e3ee30a16
Here us a digikey (without the case):
- https://www.digikey.com/short/n4d8tf04
### IDC cable
You need a cable to connect both boards
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).
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:
- Quadra 800 (Apple P/N 590-0862-B)
- PowerMac 7200-7600 (Apple P/N 590-4529-A)
If you are looking for a new one, a compatible assembly is made buy Advantech under the part number PCL-10120-1E.
## PCBs
the PCBs are simple 2 layers boards. The gerbers are avaible in the release section.
Check for the following files:
* TTT_11.zip: main board revision 1.1
* TTT_12.zip: main board revision 1.2
* DB19_IDC20.zip: adapter board revision 1.0
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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pcb/TashTwenty Tiny/TashTwenty Tiny.kicad_pcb
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pcb/TashTwenty Tiny/TashTwenty Tiny.sch
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@ -5,8 +5,8 @@ $Descr A4 11693 8268
encoding utf-8
Sheet 1 3
Title "TashTwenty Tiny"
Date "2022-05-21"
Rev "1.1"
Date "2022-06-06"
Rev "1.2"
Comp "Lostwave"
Comment1 "https://68kmla.org"
Comment2 "https://68kmla.org/bb/index.php?threads/tashtwenty-single-chip-dcd-hard-disk-20-interface.39357/"
@ -441,4 +441,6 @@ Wire Wire Line
9850 6000 9850 5600
Wire Wire Line
9850 5600 9750 5600
Text Notes 4300 6350 0 50 ~ 0
PIC1704 is now recommended.\nPIC1825 still supported.
$EndSCHEMATC