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README.md: add rev2 info
- update parts links - add rev2 errata
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‎README.md‎

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|1 |ESP-12F or ESP-12E microcontroller module| |AliExpress, eBay, Amazon, various smaller retailers |AliExpress: [1](https://www.aliexpress.com/item/New-version-ESP-12E-replace-ESP-12-ESP8266-remote-serial-Port-WIFI-wireless-module/32339917567.html), [2](https://www.aliexpress.com/item/1PCS-ESP-12F-ESP-12E-upgrade-ESP8266-Remote-Serial-Port-WIFI-Wireless-Module-ESP8266-4M-Flash/32521015580.html), [3](https://www.aliexpress.com/item/1PCS-ESP-12F-ESP-12E-upgrade-ESP8266-Remote-Serial-Port-WIFI-Wireless-Module-ESP8266-4M-Flash/32521015580.html)
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|8 |Resistor 10K |1206 |Generic part |AliExpress: [1](https://www.aliexpress.com/item/500pcs-1206-SMD-Resistor-1-10K-ohm-chip-resistor-0-25W-1-4W-103/32806664929.html), [2](https://www.aliexpress.com/item/1206-10K-ohm-5-1-4W-Resistor-3216-103-Chip-resistor-500Pcs-Lot/32601535320.html)
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|1 |Resistor 1M |1206 |Generic part |AliExpress: [1](https://www.aliexpress.com/item/500pcs-1206-SMD-Resistor-1-1M-ohm-chip-resistor-0-25W-1-4W-106/32806720513.html)
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|1 |Resistor 75 Ohms |1206 |Generic part |AliExpress: [1 (untested supplier)](https://www.aliexpress.com/item/100pcs-lot-1206-5-75-ohm-75R-750-1-4W-0-25W-SMD-Resistor-3-2/32681304598.html), [2 (untested supplier)](https://www.aliexpress.com/item/200pcs-lot-SMD-Chip-Resistor-1206-68R-75R-82R-91R-100R-5-Resistance-68-75-82/32830700367.html)
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|1 |Resistor 75 Ohms |1206 |Generic part |AliExpress: [1](https://www.aliexpress.com/item/100pcs-lot-1206-5-75-ohm-75R-750-1-4W-0-25W-SMD-Resistor-3-2/32681304598.html), [2 (untested supplier)](https://www.aliexpress.com/item/200pcs-lot-SMD-Chip-Resistor-1206-68R-75R-82R-91R-100R-5-Resistance-68-75-82/32830700367.html)
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|2 |Resistor 1K |1206 |Generic part |AliExpress: [1](https://www.aliexpress.com/item/500pcs-1206-SMD-Resistor-1-1K-ohm-chip-resistor-0-25W-1-4W-102/32806736163.html)
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|8 |Capacitor 100nF |1206 |Generic part |AliExpress: [1](https://www.aliexpress.com/item/100pcs-100NF-X7R-Error-10-50V-0-1UF-104-1206-smd-capacitor/32810080501.html), [2](https://www.aliexpress.com/item/100PCS-SMD-chip-Ceramic-capacitors-1206-104-100NF-0-1UF-1206-Y5V/1478483210.html), [3](https://www.aliexpress.com/item/100PCS-1206-104-100NF-0-1UF-1206-SMD-capacitance/32836586837.html), [4](https://www.aliexpress.com/item/Free-Shipping-100PCS-1206-104-100NF-0-1UF-1206-SMD-capacitance/1096160798.html)
67-
|2 |Capacitor 56pF |1206 |Generic part |AliExpress: [1 (untested supplier)](https://www.aliexpress.com/item/100pcs-1206-smd-capacitor-25pF-27pF-30pF-33pF-36pF-39pF-47pF-51pF-56pF-68pF/32832398866.html), [2 (untested supplier)](https://www.aliexpress.com/item/Free-Shipping-100PCS-1206-56PF-56P-5-NPO-50V-chip-SMD-Ceramic-capacitor/32449977184.html)
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|1 |Electrolytic capacitor 10uF |THT |Generic part |AliExpress: [1](https://www.aliexpress.com/item/Free-shiiping-50pcs-Aluminum-electrolytic-capacitor-10uF-50V-5-7-Electrolytic-capacitor/32326606304.html), [2](https://www.aliexpress.com/item/50-pcs-Electrolytic-Capacitors-50V-10UF-4X7MM-Aluminum-Electrolytic-Capacitor/1808204181.html)
69-
|2 |Electrolytic Capacitor 220uF |THT |Generic part |AliExpress: [1](https://www.aliexpress.com/item/1LOT-50PCS-Aluminum-Capacitors-220uF-227-20-6-11mm-25V-220000nF-220000000pF-Diameter6mm/32707926097.html)
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|2 |RCA connectors |THT |Generic, but often overpriced part |AliExpress: [red](https://www.aliexpress.com/item/10-Pcs-Pcb-Mount-3-Pin-Av-Concentric-Outlet-1-Rca-Female-Socket-Board-Connector/32778665156.html), [yellow](https://www.aliexpress.com/item/20-Pcs-3P-Pcb-Mounting-Yellow-1-Rca-Female-Outlet-Jack-Audio-Video-Av-Connector/32773151735.html)
67+
|2 |Capacitor 56pF |1206 |Generic part |AliExpress: [1](https://www.aliexpress.com/item/100pcs-1206-smd-capacitor-25pF-27pF-30pF-33pF-36pF-39pF-47pF-51pF-56pF-68pF/32832398866.html)
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|1 |Electrolytic capacitor 10uF (**Revision 1 board only!**) |THT |Generic part |AliExpress: [1](https://www.aliexpress.com/item/Free-shiiping-50pcs-Aluminum-electrolytic-capacitor-10uF-50V-5-7-Electrolytic-capacitor/32326606304.html), [2](https://www.aliexpress.com/item/50-pcs-Electrolytic-Capacitors-50V-10UF-4X7MM-Aluminum-Electrolytic-Capacitor/1808204181.html)
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|2 |Electrolytic Capacitor 220uF (**Revision 1 board only!**) |THT |Generic part |AliExpress: [1](https://www.aliexpress.com/item/1LOT-50PCS-Aluminum-Capacitors-220uF-227-20-6-11mm-25V-220000nF-220000000pF-Diameter6mm/32707926097.html)
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|1 |Capacitor 10uF (**Revision 2 board only!**)|1206 |Generic part |AliExpress: [1](https://www.aliexpress.com/item/Free-Shopping-100PCS-smd-ceramic-capacitor-1206-3216-10uf-106-25V-10/870636274.html), [2](https://www.aliexpress.com/store/product/100PCS-LOT-10uf-Error-10-50V-106-10UF-1206-SMD-Thick-Film-Chip-Multilayer-Ceramic-Capacitor/1815642_32818359105.html)
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|2 |Capacitor 22uF (**Revision 2 board only!**)|1206 |Generic part |AliExpress: [1](https://www.aliexpress.com/item/1206-22UF-226M-Y5V-10V-SMD-Chip-Multilayer-Ceramic-Capacitor-Capacitor/32506900002.html), [2](https://www.aliexpress.com/item/100PCS-LOT-22uf-Error-10-50V-226-22UF-1206-SMD-Thick-Film-Chip-Multilayer-Ceramic-Capacitor/32818355106.html)
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|2 |RCA connectors |THT |Generic, but often overpriced part |AliExpress: [1 (untested supplier)](https://www.aliexpress.com/item/ROHS-high-quality-one-pin-rca-jack-connector-RCA-103P/32305697673.html); no longer available: [red](https://www.aliexpress.com/item/10-Pcs-Pcb-Mount-3-Pin-Av-Concentric-Outlet-1-Rca-Female-Socket-Board-Connector/32778665156.html), [yellow](https://www.aliexpress.com/item/20-Pcs-3P-Pcb-Mounting-Yellow-1-Rca-Female-Outlet-Jack-Audio-Video-Av-Connector/32773151735.html)
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|1 |Micro-USB connector |SMT |Generic, but often overpriced part |AliExpress: [1](https://www.aliexpress.com/item/10Pcs-Micro-USB-5P-5-pin-Micro-USB-Jack-5Pins-No-Curling-Micro-USB-Connector-Tail/32697562974.html), [2](https://www.aliexpress.com/item/10pcs-LOT-Micro-USB-5P-5-pin-Micro-USB-Jack-5Pins-Micro-USB-Connector-Tail-Charging/32482316889.html), [3](https://www.aliexpress.com/item/10pcs-G21-Micro-USB-5pin-DIP-Female-Connector-For-Mobile-Phone-Mini-USB-Charging-Socket-Curly/32739335401.html), [4](https://www.aliexpress.com/item/50pcs-Lot-Micro-USB-5pin-B-type-Female-Connector-For-Mobile-Phone-Micro-USB-Jack-Connector/32740232877.html)
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|1 |Regulator AMS1117 3.3V |SOT-223|Generic, sometimes overpriced part |AliExpress: [1](https://www.aliexpress.com/item/20PCS-AMS1117-3-3V-AMS1117-1117-3-3V-1A-Voltage-Regulator-LDO-SOT-223/32767557089.html), [2](https://www.aliexpress.com/item/10pcs-AMS1117-3-3-AMS1117-LM1117-1117-3-3V-1A-Voltage-Regulator/32348815272.html); eBay DE: [1](https://www.ebay.de/itm/50-Stueck-AMS1117-3-3-Niedrig-Aussetzer-Spannungsregler-3-3V-1A-SOT-223-GY-/262752156305?hash=item3d2d3fba91)
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|1 |Regulator AMS1117 3.3V |SOT-223|Generic, sometimes overpriced part |AliExpress: [1](https://www.aliexpress.com/item/10pcs-AMS1117-3-3-AMS1117-LM1117-1117-3-3V-1A-Voltage-Regulator/32348815272.html); eBay DE: [1](https://www.ebay.de/itm/50-Stueck-AMS1117-3-3-Niedrig-Aussetzer-Spannungsregler-3-3V-1A-SOT-223-GY-/262752156305?hash=item3d2d3fba91)
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|1 |74HC04 hex inverter |SOIC-14|Generic part |AliExpress: [1](https://www.aliexpress.com/item/20PCS-74HC04D-SOP14-74HC04-SOP-SN74HC04DR-SMD-new-and-original-IC-free-shipping/32545540311.html), [2](https://www.aliexpress.com/item/20PCS-74HC04-SOP/32833871593.html)
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|1 |Crystal 3.579545 MHz (NTSC) or 4.433619 MHz (PAL)|HC49-S |Generic part |AliExpress: [NTSC](https://www.aliexpress.com/item/10pcs-lot-Crystal-Oscillator-3-579545MHz-3-579545-MHz3-579545M-Hz-3-579545M-Mini-Passive-Resonator/32674141136.html), [PAL (untested supplier)](https://www.aliexpress.com/item/4-433MHZ-4-433M-HC-49S-Quartz-crystal-4-433Mhz-4-433m-DIP-Quartz-crystal-resonators/897579150.html)
7577
|1 |PS/2 keyboard connector (female)|THT |AliExpress, some distributors |AliExpress: [green](https://www.aliexpress.com/item/20PCS-Lot-PS2-Green-Plug-Jack-Socket-Connector-6Pin-for-keyboard-mouse/32502046263.html), [purple](https://www.aliexpress.com/item/20PCS-Lot-PS2-Purple-Plug-Jack-Socket-Connector-6P-6Pin-for-keyboard-mouse/32503500361.html)
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## PCB Errata
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Revision 2 of the PCB contains one error:
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- R6 value is given as "22R", should be "75R".
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Revision 1 of the PCB contains two errors:
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- R6 value is given as "22R", should be "75R".

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