$1,500 smart mirror
into my AI assistant

$150 Lululemon Mirror off Marketplace. New Samsung TV board, 4K camera behind the glass.

Build steps TikTok Instagram
The panel lit up blue for the first time
first light
teardownthe plan14 pinswrong cablemountswiringfirst lightnext: ???

How it works

Episodes

Lifting the old Android board outComing soon

PART 6Gut it

Numbering backlight wires with tape flagsComing soon

PART 7Every wire gets a number

Everything laid out in the bottom bayComing soon

PART 8First light

Parts

Samsung TV board$19.99
14-pin harness$12.00
LVDS ribbon$28.49
camera$58.99
IR receiver + remote$14.04
crimp kits + WAGOs$55.93
cables + adapters$23.48
parts$212.92
mirror $1,500$150.00
PartJob
Samsung BN94-06778CDrives the panel, HDMI in
14-pin harnessBoard power, cut and wired to the Megmeet
51-pin LVDS BN96-28391NVideo to the T-con i
Innomaker U30CAM-4K-S14K UVC camera, not wide-angle
WAGO 221Every power join
XH + PA crimp kitsNew PSU and IR pins
USB-C hub, 10 ft USB-C, 1 ft HDMIOne cable to the laptop
Right-angle HDMI + auxLow clearance under the board

Signal path

Laptopoutside USB-C hubback cover 4K cameratop bay, 20° tilt Samsung boardHDMI inLVDS outheadphone out14-pin power WAGOs A to H Megmeet PSUstock Wall + rocker PanelT-con BacklightLED driver Amp+ 2 speakers USB-C 10 ft USB HDMI 51-pin LVDS aux 14-pin harness backlight cable
video / USBaudioDCAC

Wiring

Rails

Source → WAGO → load. Everything except the camera lives in the bottom bay.

12 V5 Vstandby24 VGNDenabledimsignalunused (dashed)
CON2 1–2A · 12 VCN201 7, 9, 11, 12, 13
CON2 3–5B · GNDCN201 5, 6, 8
CON2 6–7C · 5 VCN201 1, 3
CON2 8 + rockerD · standbyCN201 4
CON3 V24 ×2E · 24 VCON101 1–5
CON3 GND ×2F · BL GNDCON101 6–10
CN201 10G · BL enableCON101 12
CN201 14H · BL dimCON101 14

Connectors

Tap a photo for full size.

Megmeet CON2

13-pin XH 2.5 mm · PSU board KB-5150 · silkscreen order, slot 1 at the top
CON2 silkscreen on the Megmeet board
1V12→ A2V12→ A3GND→ B4GND→ B5GND→ B6V5→ C7V5→ C8STB→ D9PS-ON↔ rocker10V511V512GND13GND
SlotSilkStock wire went toNowWAGO
1V12Android boardnew blueA
2V12Android boardnew blueA
3GNDAndroid boardnew blackB
4GNDAndroid boardnew blackB
5GNDAndroid boardnew blackB
6V5Android boardnew yellowC
7V5Android boardnew yellowC
8STBrocker lead (red)new 10 cm leadD
9PS-ONrocker leadstock, untouched–
10V5mic boardunused–
11V5mic boarddepinned–
12GNDmic boarddepinned–
13GNDmic boardunused–
  • Rocker switch bridges 8 STB to 9 PS-ON: rocker on pulls PS-ON up and the main rails start.
  • Slot 8's rocker lead was too thin for a WAGO, so it was depinned rather than cut. New lead in slot 8, rocker lead and the STB jumper share WAGO D.
  • New leads: 22 AWG, short XH pins, CON2-to-board + 20 cm. Blue = 12 V, black = GND, yellow = 5 V.

Megmeet CON3 + CON5

24 V backlight rail · 12 V amp rail
CON3 and CON5 on the Megmeet
1234
CON3
1234
CON5
HeaderPinsSilkStockNow
CON34V24 ×2 GND ×2Cut off the Android-end plugE (24 V), F (GND)
CON54GND ×2 V12 ×2Amp VCC / GNDstock cable, untouched
8-pin header8GND ×4 V24 ×4empty–
  • Before cutting CON3: black probe on CON2 slot 3, beep each CON3 wire. The 2 GND wires beep, the 2 V24 wires don't.
  • Pin order inside CON3 isn't silkscreened per pin. Tag from the beep test, not from wire colour.

Samsung CN201

14-pin power in · BN94-06778C (UN39FH5000FXZA) on BN97-07695D
Hand-marked CN201 pin map
2468101214
135791113
solder side · square pad = 1 · odd row toward the board edge
PinSamsung netRoleThread #iWAGOBoard unplugged
1B5.3V5 V13C5 V
2SW_PWunused14tape off0 V
3B5.3V5 V11C5 V
4A5.3Vstandby 5 V12D5 V
5GNDGND9B0 V
6GNDGND10B0 V
7B13VS_AMP12 V7A12 V
8GNDGND8B0 V
9B13VS_AMP12 V5A12 V
10SW_INVBL enable6G0 V*
11B13VS_PW12 V3A12 V
12B13VS_PW12 V4A12 V
13B13VS_PW12 V1A12 V
14PWM_DIMBL PWM dim2H0 V*
  • Groups, beeped with the harness on the board, unpowered: 5, 6, 8 to the HDMI shell · 11–12–13 · 7–9 · 1–3.
  • Pins depinned (latch pressed with a pick), not cut. Pin 1's wire snapped on extraction and was re-crimped.
  • *10 and 14 are outputs from the board, so they read 0 V until it's plugged in.

Backlight CON101

14-wire foil-shielded cable · LED driver LJ63-15536A on the panel
CON101 on the LED driver board
1234567891011121314
as seen on the LED driver: pin 1 on the right, red wire = 14
WireFunctionRoleWAGO
1VIN24 V inE
2VIN24 V inE
3VIN24 V inE
4VIN24 V inE
5VIN24 V inE
6GNDGNDF
7GNDGNDF
8GNDGNDF
9GNDGNDF
10GNDGNDF
11NCunusedtape off
12ENAenableG
13NCunusedtape off
14EXT_DIMdimH
  • Cut behind the Android-end plug, foil trimmed back 6 cm.
  • Each wire beeped to the CON101 legs and flagged 1–14 with tape before anything else.
  • VIN and GND pair up into WAGO ports: 1+2, 3+4, 5 and 6+7, 8+9, 10.

LVDS ribbon

video, board to panel
The wrong 41-pin ribbon
CN1301 (FHD)T-con PANEL
51-pin FFC, contacts span ~25 mm
Board endCN1301_FHD (blue stiffener end). CN1302_HD unused
Panel endT-con socket marked PANEL
CableBN96-28391N, from a Samsung UN75F6300
Lengthneeds ~750 mm board-to-T-con. Listing estimate ~80 cm from the 23 mm width
Wrong onefirst cable: 41-pin, 500 mm, sold as 51-pin
  • Count contacts before inserting. 41 vs 51 is easy to miss: the narrow one still clicks in, flush to one end.

Audio: CN301 to amp

headphone out → 2-ch class-D amp (12 V from CON5)
The red amp board
TRS
3.5 mm into CN301
LRG
amp 3-pin XH in
3.5 mmSignalLands on
TipLeftamp L
RingRightamp R
SleeveGNDamp GND
  • Stock path was Megmeet → mic board → amp. Mic board removed; the old 3-pin XH input cable was cut and re-terminated onto an aux pigtail.
  • Board clearance is ~3.4 mm, so the plug goes in through a right-angle adapter. The first 90° aux was too bulky; use a low-profile one without a mic ring.
  • First build gave no sound and was remade. Beep tip/ring/sleeve before crimping.

IR receiver: CN702 (optional)

TSOP4838 · legs left to right with the dome facing you
Calipers on the IR receiver
123456
PA 2.0 6-pin into CN702
PinSignalFrom
1OUTTSOP4838 left leg
2GNDmiddle leg
3VSright leg
4–6keysunused
  • Body 6.08 × 6.86 × 3.75 mm, 5.93 mm with dome. Mount: IR mount.
  • My build read OL at the plug and was dropped. The board powers up straight to HDMI, so no remote is needed.

WAGO ports

One port per box. "7+9" = two wires twisted into one port.

A · 12 V221-415 · 5-port · by the board
1CN201 7+92CN201 11+123CN201 134CON2 1 blue5CON2 2 blue
B · GND221-415 · 5-port · by the board
1CN201 5+62CN201 83CON2 3 black4CON2 4 black5CON2 5 black
C · 5 V221-413 · 3-port · by the board
1CN201 1+32CON2 6 yellow3CON2 7 yellow
D1 · standby221-413 · 3-port · beside CON2
1CON2 8 new lead2rocker lead3STB jumper
D2 · standby221-412 · 2-port · by the board
1STB jumper2CN201 4
E · 24 V221-415 · 5-port
1CON101 1+22CON101 3+43CON101 54CON3 V245CON3 V24
F · BL GND221-415 · 5-port
1CON101 6+72CON101 8+93CON101 104CON3 GND5CON3 GND
G · BL enable221-412 · 2-port
1CON101 122CN201 10
H · BL dim221-412 · 2-port
1CON101 142CN201 14

Stock: 4× 5-port, 8× 3-port, 8× 2-port. Power uses 4× 5-port, 2× 3-port, 3× 2-port.

Checks

1 · Continuity, unpowered

ProbeToExpect
CN201 pad nharness wire nbeep, all 14
CN201 5, 6, 8HDMI shellbeep
CN201 1112, 13beep
CN201 79beep
CN201 13beep
CON2 slotssilkscreen netsmatch
CON3 wiresCON2 slot 32 beep (GND), 2 open
CON101 legscut wire ends1:1, flag each
A, C, EB / Fopen (no short)

2 · Voltage, board unplugged

+ probe− probeExpectRead
CN201 7, 9, 11, 12, 13B12 V12.07
CN201 1, 3, 4 (STB)B5 V5.3
CN201 2, 5, 6, 8, 10, 14B0 V0.01
EF24 V–
CON5 V12CON5 GND12 V–

Wall on, rocker on, paper under the bay. Over ±10%: power down, find it, don't plug in.

Wire + crimp spec

WireFermerry 22 AWG stranded. Blue 12 V, black GND, yellow 5 V
CON2 pinsJST XH 2.5 mm, short pins, strip 2.5 mm, tug-test each
IR plugPA 2.0 mm 6-pin
WAGO strip11 mm. Thin harness wire: strip 22 mm, fold in half
WAGO type221-41x lever (24–12 AWG). Not 221-2401 inline (20–12 AWG, won't grip 22)
LengthsCON2 → board spot + 20 cm. Nothing runs full height; camera is USB
Count~50 crimps total
InsulationWAGOs taped to plastic, flat. Paper under the board for first power-on
Samsung board sticker: UN39FH5000FXZA, BN94-06778C
firmware sticker
Solder side of the Samsung board
solder side
CON3 and CON5 silkscreen
CON3 + CON5

Build steps

0 / 0
i
Step 1

Teardown

The original Android board
old brain
Lifting the Android board out
out
The Megmeet power supply
Megmeet stays
Step 2

Map the harness

Tagging the harness wires
tag every wire
The Samsung TV board
new brain
Step 3

Repin CON2

The CON2 plug on the Megmeet
CON2
Step 4

Number the backlight cable

Numbering wires with tape flags
flag 1–14
Step 5

WAGOs

Clicking wires into WAGO connectors
click
A WAGO lever connector
WAGO 221
Step 6

Voltage check

Step 7

Mount + first light

The wrong 41-pin ribbon
41-pin, wrong
Everything laid out in the bottom bay
it fits
The panel lit up blue
first light
Step 8

Audio + USB-C

Cable management in the bottom bay
tidy

3D prints

OpenSCAD · Bambu P1S · PLA on textured PEI, 55 °C, no supports

Camera board snapped into the printed v2 mount in the top bay

Camera mount v2

Fits
38 mm board, 20° down, snap-in
Print
1 h 55, brim
Hardware
3× M4 nuts
STLSCADJigDraft
IR receiver mount render

IR receiver mount i

Fits
TSOP4838, 74 mm stud pitch
Print
34 min, one plate
BaseCapSCAD
Underside of the Samsung board with four printed feet

Board feet

Fits
BN94-06778C corner holes, 3.4 mm tall
Hardware
4× M3×4, washer, nut; VHB
STLSCAD
Printed v1 mount holding the original stick cameraretired

Camera mount v1

Fits
Arducam 16MP USB stick
STLSCAD

Board-to-panel matching from the olm3ca/mirror thread.