Add discrete step-up converter option

PCB/Lib/geki_main.kicad_sym

@@ -2,6 +2,175 @@
 	(version 20231120)
 	(generator "kicad_symbol_editor")
 	(generator_version "8.0")
+	(symbol "HT7750A"
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(property "Reference" "U"
+			(at 0 7.62 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Value" "HT7750A"
+			(at 6.35 -7.62 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Footprint" "Package_TO_SOT_SMD:SOT-23-5_HandSoldering"
+			(at 0 -22.86 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "https://www.ti.com/lit/ds/symlink/tps61022.pdf"
+			(at 0 -25.4 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "5V Step-up Converter"
+			(at -1.016 -9.652 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "ki_keywords" "step-up"
+			(at 0 0 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "ki_fp_filters" "Texas*RWU0007A*VQFN*2x2mm*P0.5mm*"
+			(at 0 0 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(symbol "HT7750A_1_1"
+			(rectangle
+				(start -7.62 5.08)
+				(end 7.62 -5.08)
+				(stroke
+					(width 0)
+					(type default)
+				)
+				(fill
+					(type background)
+				)
+			)
+			(pin power_in line
+				(at -10.16 -2.54 0)
+				(length 2.54)
+				(name "CE"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+				(number "1"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+			)
+			(pin power_out line
+				(at 10.16 2.54 180)
+				(length 2.54)
+				(name "VOUT"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+				(number "2"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+			)
+			(pin no_connect line
+				(at 10.16 -2.54 180)
+				(length 2.54)
+				(name "NC"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+				(number "3"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+			)
+			(pin power_in line
+				(at 0 -7.62 90)
+				(length 2.54)
+				(name "GND"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+				(number "4"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+			)
+			(pin output line
+				(at -10.16 2.54 0)
+				(length 2.54)
+				(name "LX"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+				(number "5"
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+			)
+		)
+	)
 	(symbol "MPR121QR2_BOARD"
 		(exclude_from_sim no)
 		(in_bom yes)

PCB/main/fp-info-cache

@@ -1,4 +1,4 @@
-24008228478717009
+24008281153734049
 Audio_Module
 Reverb_BTDR-1H
 Digital Reverberation Unit, http://www.belton.co.kr/inc/downfile.php?seq=17&file=pdf (footprint from http://www.uk-electronic.de/PDF/BTDR-1.pdf)

PCB/main/geki_main.kicad_prl

@@ -1,7 +1,7 @@
 {
   "board": {
-    "active_layer": 31,
-    "active_layer_preset": "All Layers",
+    "active_layer": 0,
+    "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_netclasses": [],
     "hidden_nets": [
@@ -19,13 +19,13 @@
     "ratsnest_display_mode": 0,
     "selection_filter": {
       "dimensions": false,
-      "footprints": false,
+      "footprints": true,
       "graphics": true,
       "keepouts": false,
       "lockedItems": true,
       "otherItems": false,
       "pads": false,
-      "text": false,
+      "text": true,
       "tracks": true,
       "vias": true,
       "zones": false
@@ -66,7 +66,7 @@
       35,
       36
     ],
-    "visible_layers": "fffffff_ffffffff",
+    "visible_layers": "ffc3cff_7fffffff",
     "zone_display_mode": 0
   },
   "git": {

PCB/main/geki_main.kicad_pro

@@ -490,7 +490,7 @@
       "plot": "../../Production/PCB/geki_main/",
       "pos_files": "",
       "specctra_dsn": "",
-      "step": "geki_main_3d_v11.step",
+      "step": "geki_main_3d_v13.step",
       "svg": "",
       "vrml": "iidx_pico.wrl"
     },

README.md

@@ -83,7 +83,8 @@ It's CC-NC. So DIY for yourself and for your friend, don't make money from it. A
   https://www.digikey.com/short/fmm54dzq
 
 * 1x Small 3V to 5V DC-DC step up or up-down converter (U6). Make sure its output is 5V and input range covers 3.3V. If the one you get has different pinout, you need to hand wire it.  
-  https://www.dfrobot.com/product-1766.html
+  https://www.dfrobot.com/product-1766.html  
+  Alternatively, on PCB version v1.3 or later, there's an option for discrete components to replace the DC-DC module. You need an HT7750A in SOT23-5 (SOT25) package, a 22uH or 33uH inductor no larger than 5020, a Schottky diode (SS14, SS24, SS34, etc), and 2x 22uF 1206 capacitors.
 
 * 8x 0603 0.1uF (0.1~1uF all fine) capacitors (C1 to C8), OPTIONAL but strongly recommended.
 * 2x 0603 5.1kohm resistors (R1, R2) for the USB.

README_CN.md

@@ -82,7 +82,8 @@
   https://www.digikey.com/short/fmm54dzq
 
 * 1x 迷你的 3V 到 5V DCDC 转换器，升压或者升降压的都可以 (U6)。注意输出一定要 5V，输入电压范围要能够覆盖 3.3V。如果你买到的模块引脚不对，你需要手工飞线。  
-  https://www.dfrobot.com/product-1766.html
+  https://www.dfrobot.com/product-1766.html  
+  在 PCB v1.3 或者更新版本上，你可以选择使用离散元件替代 DC-DC 模块。你需要一个 SOT23-5 (SOT25) 封装的 HT7750A, 一个 22uH 或者 33uH 的电感，一个肖特基二极管 (SS14, SS24, SS34 等)，和 2x 22uF 1206 电容。
 
 * 8x 0603 0.1uF (0.1~1uF 都可以) 电容 (C1 to C8), 可选，但是建议都焊上。
 * 2x 0603 5.1kohm 电阻 (R1, R2) ，给 USB 口用的.