add hw1.0 description and schematic

README.md

@@ -18,3 +18,7 @@ Kickstarter page: [kickstarter.com](https://www.kickstarter.com/projects/flipper
 * [Bluetooth](wiki/bluetooth.md)
 * [NFC](wiki/nfc.md)
 
+## Hardware
+
+* [Version 1.0](wiki/hw-1.0.md)
+* In progress Version 1.1

wiki/hw-1.0.md

@@ -0,0 +1,21 @@
+# Hardware version 1.0
+
+[device schematic](wiki/flipper_zero_rev_1_0.pdf)
+
+## Errata
+
+* NAND reset IC drive reset net by push-pull output may cause MCU fault and disable internal MCU reset feature.
+* System going to boot-loop state when reset by reset circuit
+* No resistors on external gpio for protecting MCU
+* Wrong value LED series resistor
+* Wrong footprint for CMOS transistors
+* Wrong value IR TX series resistor
+* No need capacitor on IR RX
+* Wrong value IR RX pullup resistor
+* 125 kHz RFID + iButton wrong schematic
+* It seems bad to place main VCC on external GPIO pins. Overcurrent can damage main regulator and cause device broken. User can apply wrong voltage on this pin.
+
+## New RFID + iButton schematic
+
+after many experiments we found good schematic solution for work with RFID and auxiliary follow iButton level (for non-TTL protocol like Cyphral)
+