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4 changes: 2 additions & 2 deletions PCB/v2.x/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -108,7 +108,7 @@ The droids use XBee Zigbee 3.0, so the controller joins that network through the
Recommended bringup order:
1. Current-limited supply on VSYS, with no carrier fitted: press power for 1 s, then check 3V3 and idle current.
2. Flash over USB with no button held, with SW_BOOT1 held at power-on if the chip does not enumerate. Confirm `PWR_HOLD` reads high.
3. Time the shortest press that stays on, at 3.3 V and 4.2 V. The simulation gives under 0.3 s at worst, so a 1 s press is well clear. Run a USB upload with no button held, then confirm a watchdog reset reboots the board. Power off at least 20 times, on USB and on battery, and scope `PWR_EN` and `PWR_LATCH_G`: the board must stay off every time, since the simulation's margin has not been measured.
3. Time the shortest press that stays on, at 3.3 V and 4.2 V. The simulation gives under 0.4 s at worst, so a 1 s press is well clear. Run a USB upload with no button held, then confirm a watchdog reset reboots the board. Power off at least 20 times, on USB and on battery, and scope `PWR_EN` and `PWR_LATCH_G`: the board must stay off every time, since the simulation's margin has not been measured.
4. OLED and ICM-42670-P on I2C.
5. SK6812 RGB LED.
6. Buttons, using the pin table.
Expand All @@ -123,7 +123,7 @@ Recommended bringup order:
- Battery → bq25185 (charger and power path, 4.2V, 500mA) → TLV62569 (3.3V buck) → 3V3 for everything, including the carrier.
- Power switch: soft latch (AO3401A PFET + AO3400A NFET) controls the TLV62569 EN pin. USB does not hold it on.
- Boot: press the power button for about a second → latch enables 3V3 → RXD0's pull-up holds the latch through D_OR2 as soon as the chip has power → firmware drives RXD0 high.
- Shutdown: firmware sees a hold on IO21 → graceful shutdown → RXD0 low → the gate decays through R_LATCH_G1 → C_LATCH_FB1 kicks it clear of threshold as PWR_EN falls → power cut after about 0.6-2 s, counted from release if the button is still held.
- Shutdown: firmware sees a hold on IO21 → graceful shutdown → RXD0 low → the gate decays through R_LATCH_G1 → C_LATCH_FB1 kicks it clear of threshold as PWR_EN falls → power cut after about 0.8-2.6 s, counted from release if the button is still held.
- bq25185 STAT1 and STAT2 go to IO15 and IO14 (open drain, 10kΩ pull-ups to 3V3).
- Battery voltage: VSYS through R_VSYS1/R_VSYS2 to IO7, reading VSYS/3.
- Below about 3.3 V on the battery the buck passes it through, and the DRV5055's minimum is 3.0 V, so the firmware cutoff should sit above that.
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2 changes: 1 addition & 1 deletion PCB/v2.x/diagrams/power_control_layout.md
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Expand Up @@ -19,7 +19,7 @@ A press-to-start, software-held latch: the button turns the board on, the MCU ha
| R_GATE1 | 100kΩ | 0402 | Q_PWR1 gate pull-up — off by default |
| R_LATCH_G1 | 1MΩ | 0402 | Q_LATCH1 gate pull-down — off by default; sized to not starve the diode-OR's drive (callout D) |
| C_LATCH_G1 | 1µF | 0402 | Latch-gate filter — keeps the ~2ms battery-insertion transient from lifting `PWR_LATCH_G` (callout I) |
| C_LATCH_FB1 | 470nF | 0603 | `PWR_EN` to `PWR_LATCH_G` — gives the latch hysteresis at power-off (callout J) |
| C_LATCH_FB1 | 1µF | 0603 | `PWR_EN` to `PWR_LATCH_G` — gives the latch hysteresis at power-off (callout J) |
| R_BTN_PU1 | 100kΩ | 0402 | Button sense pull-up to **3V3** (not VSYS) — MCU reads pressed (0V) vs idle (3.3V); callout H |
| R_INV_BASE1 | 100kΩ | 0402 | Dedicated VSYS pull-up for Q_INV1's base — decoupled from `PWR_BTN_SENSE` (callout F) |
| D_INV_ISO1 | BAT54W-7-F | SOT-323 | Schottky isolator: lets a press pull Q_INV1's base low without loading `PWR_BTN_SENSE` |
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3 changes: 1 addition & 2 deletions PCB/v2.x/production/bom/snips_controller-bom.csv
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Expand Up @@ -10,7 +10,7 @@ Refs,Quantity,Value,Footprint,MF,MPN,LCSC,Mouser,DigiKey,Hand,DNP
"R_LATCH_G1","1","1MΩ ±1% 62.5mW | 0402WGF1004TCE | UNI-ROYAL | 0402","Resistor_SMD:R_0402_1005Metric","UNI-ROYAL(Uniroyal Elec)","0402WGF1004TCE","C26083","","","",""
"D_OR1,D_OR2","2","1N4148W switching diode 75V 150mA | 1N4148W | ST | SOD-123","Diode_SMD:D_SOD-123","ST(Semtech)","1N4148W","C81598","","","",""
"R_TRIG1","1","1kΩ ±1% 62.5mW | 0402WGF1001TCE | UNI-ROYAL | 0402","Resistor_SMD:R_0402_1005Metric","UNI-ROYAL(Uniroyal Elec)","0402WGF1001TCE","C11702","","","",""
"C_EN1,C_OLED_1","2","1µF 50V X5R ±10% | CL10A105KB8NNNC | Samsung | 0603","Capacitor_SMD:C_0603_1608Metric","Samsung Electro-Mechanics","CL10A105KB8NNNC","C15849","","","",""
"C_EN1,C_LATCH_FB1,C_OLED_1","3","1µF 50V X5R ±10% | CL10A105KB8NNNC | Samsung | 0603","Capacitor_SMD:C_0603_1608Metric","Samsung Electro-Mechanics","CL10A105KB8NNNC","C15849","","","",""
"C_LATCH_G1","1","1µF 6.3V X5R ±10% | CL05A105KQ5NNNC | Samsung | 0402","Capacitor_SMD:C_0402_1005Metric","Samsung Electro-Mechanics","CL05A105KQ5NNNC","C107372","","","",""
"C_IMU_2","1","2.2µF 10V X7R ±10% | CL10B225KP8NNNC | Samsung | 0603","Capacitor_SMD:C_0603_1608Metric","Samsung Electro-Mechanics","CL10B225KP8NNNC","C100082","","","",""
"L_BUCK1","1","2.2µH ±20% 2.9A 44mΩ power inductor | SRN4018-2R2M | Bourns | SMD 4x4mm","Inductor_SMD:L_Bourns-SRN4018","Bourns","SRN4018-2R2M","C913207","","","",""
Expand All @@ -22,7 +22,6 @@ Refs,Quantity,Value,Footprint,MF,MPN,LCSC,Mouser,DigiKey,Hand,DNP
"R_USB_DM1,R_USB_DP1","2","27Ω ±1% 62.5mW | RC0402FR-0727RL | Yageo | 0402","Resistor_SMD:R_0402_1005Metric","Yageo","RC0402FR-0727RL","C138021","","","",""
"C_MCU_3","1","39pF 50V NP0 ±5% | CC0402JRNPO9BN390 | Yageo | 0402","Capacitor_SMD:C_0402_1005Metric","Yageo","CC0402JRNPO9BN390","C106223","","","",""
"R_I2C_SCL1,R_I2C_SDA1","2","4.7kΩ ±1% 62.5mW | 0402WGF4701TCE | UNI-ROYAL | 0402","Resistor_SMD:R_0402_1005Metric","UNI-ROYAL(Uniroyal Elec)","0402WGF4701TCE","C25900","","","",""
"C_LATCH_FB1","1","470nF 25V X7R ±10% | CL10B474KA8NNNC | Samsung | 0603","Capacitor_SMD:C_0603_1608Metric","Samsung Electro-Mechanics","CL10B474KA8NNNC","C1623","","","",""
"R_RGB1","1","470Ω ±1% 62.5mW | 0402WGF4700TCE | UNI-ROYAL | 0402","Resistor_SMD:R_0402_1005Metric","UNI-ROYAL(Uniroyal Elec)","0402WGF4700TCE","C25117","","","",""
"R_CC1,R_CC2","2","5.1kΩ ±1% 62.5mW | 0402WGF5101TCE | UNI-ROYAL | 0402","Resistor_SMD:R_0402_1005Metric","UNI-ROYAL(Uniroyal Elec)","0402WGF5101TCE","C25905","","","",""
"R_FB2","1","56.2kΩ ±1% 62.5mW | RC0402FR-0756K2L | Yageo | 0402","Resistor_SMD:R_0402_1005Metric","Yageo","RC0402FR-0756K2L","C183355","","","",""
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-B_Cu.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-B_Mask.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-B_Paste.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-B_Silkscreen.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-Edge_Cuts.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-F_Cu.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-F_Mask.gbr
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%TF.GenerationSoftware,KiCad,Pcbnew,10.0.5*%
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-F_Paste.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-F_Silkscreen.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-In1_Cu.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-In2_Cu.gbr
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-NPTH.drl
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M48
; DRILL file KiCad 10.0.5 date 2026-11-01T11:55:16
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FMAT,2
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/gerbers/snips_controller-PTH.drl
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M48
; DRILL file KiCad 10.0.5 date 2026-11-01T11:55:16
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2 changes: 1 addition & 1 deletion PCB/v2.x/production/gerbers/snips_controller-job.gbrjob
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Expand Up @@ -5,7 +5,7 @@
"Application": "Pcbnew",
"Version": "10.0.5"
},
"CreationDate": "2026-11-01T11:55:16-08:00"
"CreationDate": "2026-11-01T19:51:01-08:00"
},
"GeneralSpecs": {
"ProjectId": {
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Binary file modified PCB/v2.x/production/gerbers/snips_controller.zip
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Binary file modified PCB/v2.x/production/jlcpcb/Snips_2_0.zip
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/placement/snips_controller-all.pos
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@@ -1,4 +1,4 @@
### Footprint positions - created on 2026-11-01T11:55:16 ###
### Footprint positions - created on 2026-11-01T19:51:01 ###
### Printed by KiCad version 10.0.5
## Unit = mm, Angle = deg.
## Side : All
Expand All @@ -11,7 +11,7 @@ C_HALL1 100nF_16V_X7R_±10%_|_CL05B104KO5NNNC_|_Samsung_|_0402
C_IMU_1 100nF_16V_X7R_±10%_|_CL05B104KO5NNNC_|_Samsung_|_0402 C_0402_1005Metric 127.2000 -125.9000 0.0000 bottom
C_IMU_2 2.2µF_10V_X7R_±10%_|_CL10B225KP8NNNC_|_Samsung_|_0603 C_0603_1608Metric 124.7000 -125.7000 180.0000 bottom
C_IMU_3 10nF_50V_X7R_±10%_|_CL05B103KB5NNNC_|_Samsung_|_0402 C_0402_1005Metric 127.1800 -128.5000 180.0000 bottom
C_LATCH_FB1 470nF_25V_X7R_±10%_|_CL10B474KA8NNNC_|_Samsung_|_0603 C_0603_1608Metric 137.4000 -80.8000 180.0000 bottom
C_LATCH_FB1 1µF_50V_X5R_±10%_|_CL10A105KB8NNNC_|_Samsung_|_0603 C_0603_1608Metric 137.4000 -80.8000 180.0000 bottom
C_LATCH_G1 1µF_6.3V_X5R_±10%_|_CL05A105KQ5NNNC_|_Samsung_|_0402 C_0402_1005Metric 135.0050 -74.8900 180.0000 bottom
C_STICK1 100nF_16V_X7R_±10%_|_CL05B104KO5NNNC_|_Samsung_|_0402 C_0402_1005Metric 145.5050 -76.2050 -90.0000 bottom
C_SYS_1 10µF_25V_X5R_±10%_|_CL21A106KAYNNNE_|_Samsung_|_0805 C_0805_2012Metric 134.7000 -94.2500 0.0000 bottom
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6 changes: 3 additions & 3 deletions PCB/v2.x/production/placement/snips_controller-pnp_bottom.gbr
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%FSLAX46Y46*%
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
G04 Created by KiCad (PCBNEW 10.0.5) date 2026-11-01 11:55:17*
G04 Created by KiCad (PCBNEW 10.0.5) date 2026-11-01 19:51:02*
%MOMM*%
%LPD*%
G01*
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D10*
%TO.C,C_LATCH_FB1*%
%TO.CFtp,C_0603_1608Metric*%
%TO.CVal,470nF 25V X7R ±10\u0025 | CL10B474KA8NNNC | Samsung | 0603*%
%TO.CVal,1µF 50V X5R ±10\u0025 | CL10A105KB8NNNC | Samsung | 0603*%
%TO.CMnt,SMD*%
%TO.CRot,0*%
X137400000Y-80800000D03*
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4 changes: 2 additions & 2 deletions PCB/v2.x/production/placement/snips_controller-pnp_top.gbr
Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
%TF.GenerationSoftware,KiCad,Pcbnew,10.0.5*%
%TF.CreationDate,2026-11-01T11:55:17-08:00*%
%TF.CreationDate,2026-11-01T19:51:02-08:00*%
%TF.ProjectId,snips_controller,736e6970-735f-4636-9f6e-74726f6c6c65,rev?*%
%TF.SameCoordinates,Original*%
%TF.FileFunction,Component,L1,Top*%
%TF.FilePolarity,Positive*%
%FSLAX46Y46*%
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
G04 Created by KiCad (PCBNEW 10.0.5) date 2026-11-01 11:55:17*
G04 Created by KiCad (PCBNEW 10.0.5) date 2026-11-01 19:51:02*
%MOMM*%
%LPD*%
G01*
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