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LastZactionHero
RP2040-based DEF CON silent disco badge — KiCad project + tooling
| Reference | Value | Description |
|---|---|---|
| U1 | TP4056 | Li-Ion 1A linear charger (ESOP-8) |
| U2 | ME6211C33M5G | 500 mA 3.3V LDO |
| U3 | WM2606220057 | |
| U4 | RP2040 | |
| U5 | TM8211 | Stereo DAC, LSBJ I2S (PT8211 clone) |
| U6 | TDA1308 | Dual headphone amp (rail-to-rail) |
| U7 | TSOP4838 | 38 kHz IR demodulating receiver, side-view |
| C1,C3,C4,C7,C12,C14 | 1u | ME6211 VIN bypass,ME6211 VOUT bypass,TP4056 VCC bypass |
|---|
| C2,C21-C24,C31 | 10u | DAC VDD bulk,L channel DAC→amp coupling,R channel DAC→amp coupling,TP4056 BAT bulk,TSOP VS bulk,VGND bypass |
|---|
| C5,C6 | 15p |
|---|
| C8 | 100nF | Unpolarized capacitor |
|---|
| C9-C11,C13,C15-C18,C20,C30 | 100n | DAC VDD decoupling,TSOP VS decoupling |
|---|
| C25,C26 | 220u | L output coupling (electrolytic, 6.3V),R output coupling (electrolytic, 6.3V) |
|---|
| C27-C29,C32 | 10n | SK9822 #1 bypass,SK9822 #2 bypass,SK9822 #3 bypass,SK9822 #4 bypass |
|---|
| CHANNEL1,SYNC1,VOL+1,VOL-1 | TS-1187A | Channel button (CH), 6mm tactile,Sync (tap-to-sync) button,Volume down,Volume up |
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| D1 | IR LED 940 nm | 940 nm IR transmit LED, 1206 (anode=pad1 per datasheet) |
|---|
| H1-H4 | MountingHole |
|---|
| J1 | USB_C_Receptacle_USB2.0_16P | USB-C 16P top-mount (GCT USB4085; USB4520/USB4500 mid-mount drop-in if preferred) |
|---|
| J2 | JST-PH 2P | JST-PH 2P battery (BAT+, BAT-) |
|---|
| J3 | microSD | microSD push socket, hinged tray |
|---|
| J5 | SJ1-3523N | 3.5mm stereo TRS jack (CUI SJ1-3523N), through-hole edge-mount |
|---|
| LED1-LED4 | SK9822 | SK9822 #1 of 4 chained (5050),SK9822 #2 of 4 chained (5050),SK9822 #3 of 4 chained (5050),SK9822 #4 of 4 chained (5050) |
|---|
| R1,R2 | 5.1k | USB-C CC1 pulldown (UFP),USB-C CC2 pulldown (UFP) |
|---|
| R3 | 2.4k | TP4056 PROG → 500 mA |
|---|
| R4-R6,R18,R19 | 100k | L feedback,R feedback,VBAT divider bottom,VBAT divider top,~CHRG pullup to 3V3 |
|---|
| R7-R9,R15,R20,R21,R23 | 10k | RUN pull-up to +3V3 (RP2040 reset noise immunity),Resistor,VGND bottom,VGND top,microSD card-detect pull-up to +3V3 |
|---|
| R10,R12 | 1k |
|---|
| R11 | DNF |
|---|
| R13,R14 | 27 |
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| R16,R17 | 47k | L amp input,R amp input |
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| R22 | 150 | IR LED current limit for direct GPIO drive (~12 mA pulsed) |
|---|
| SW1 | SS-12D00 | Slide power switch (SS-12D00 / MSK-12C02 compatible) |
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| TP1 | BOOTSEL |
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| TP2 | GND |
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| Y1 | ABM8-272-T3 |
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