diff --git a/frontend/src/__tests__/__snapshots__/examples-netlist-snapshot.test.ts.snap b/frontend/src/__tests__/__snapshots__/examples-netlist-snapshot.test.ts.snap
index 38b747e0..65496e2c 100644
--- a/frontend/src/__tests__/__snapshots__/examples-netlist-snapshot.test.ts.snap
+++ b/frontend/src/__tests__/__snapshots__/examples-netlist-snapshot.test.ts.snap
@@ -1024,7 +1024,7 @@ R_vm_vmR n0 0 10Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > and-gate-alarm 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > and-gate-alarm 1`] = `
 "* Velxio circuit
 V_src n1 0 DC 5
 R_sw1 n1 n2 1000000000
@@ -1041,7 +1041,7 @@ D_led1 led1_sense_mid 0 LED_RED
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > battery-voltage-monitor 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > battery-voltage-monitor 1`] = `
 "* Velxio circuit
 R_r2 n0 n1 10000
 R_autopull_n0 n0 0 100Meg
@@ -1050,7 +1050,7 @@ R_autopull_n1 n1 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > binary-counter-leds 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > binary-counter-leds 1`] = `
 "* Velxio circuit
 R_r0 n0 n5 220
 R_r1 n1 n6 220
@@ -1081,7 +1081,7 @@ R_autopull_n8 n8 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > bjt-common-emitter 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > bjt-common-emitter 1`] = `
 "* Velxio circuit
 R_rb1 n0 n2 47000
 R_rb2 n2 0 10000
@@ -1095,7 +1095,7 @@ R_rin n4 n2 10000
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > capacitor-charge-curve 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > capacitor-charge-curve 1`] = `
 "* Velxio circuit
 R_r1 n0 n2 10000
 C_c1 n2 n1 0.00009999999999999999 IC=0
@@ -1106,7 +1106,7 @@ R_autopull_n2 n2 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > darlington-high-current 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > darlington-high-current 1`] = `
 "* Velxio circuit
 R_rb n1 n5 10000
 R_rl n0 n6 220
@@ -1127,7 +1127,7 @@ R_autopull_n6 n6 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > diode-rectifier 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > diode-rectifier 1`] = `
 "* Velxio circuit
 V_sg1 n1 0 SIN(0 5 50)
 D_d1 n1 n0 D1N4007
@@ -1137,7 +1137,7 @@ R_rl n0 0 1000
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > esp32-dual-adc 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > esp32-dual-adc 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_pot1_top vcc_rail n0 10000
@@ -1148,7 +1148,7 @@ R_pot2_bot n1 0 1
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > esp32-pwm-led-rgb 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > esp32-pwm-led-rgb 1`] = `
 "* Velxio circuit
 R_rr n0 n6 220
 R_rg n1 n4 220
@@ -1164,7 +1164,7 @@ R_autopull_n6 n6 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > full-adder 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > full-adder 1`] = `
 "* Velxio circuit
 R_bA n0 n5 1000000000
 R_bB n1 n5 1000000000
@@ -1189,7 +1189,7 @@ R_autopull_n7 n7 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > l293d-motor-control 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > l293d-motor-control 1`] = `
 "* Velxio circuit
 B_u1_ch1a n4 0 V = u(V(n3)-2.5) * u(V(n1)-2.5) * V(n0)
 R_u1_ch1a_load n4 0 10Meg
@@ -1204,7 +1204,7 @@ R_autopull_n3 n3 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > l293d-speed-pwm 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > l293d-speed-pwm 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_pot_top vcc_rail n3 10000
@@ -1221,7 +1221,7 @@ R_autopull_n2 n2 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > led-current-limiting 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > led-current-limiting 1`] = `
 "* Velxio circuit
 R_r1 n0 n2 330
 V_led1_sense n2 led1_sense_mid DC 0
@@ -1234,7 +1234,7 @@ R_autopull_n2 n2 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > lm317-adjustable-psu 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > lm317-adjustable-psu 1`] = `
 "* Velxio circuit
 V_bat n0 bat_int DC 9
 R_bat_esr bat_int n1 1.5
@@ -1248,7 +1248,7 @@ R_autopull_n0 n0 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > logic-probe 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > logic-probe 1`] = `
 "* Velxio circuit
 V_gLed_sense n3 gLed_sense_mid DC 0
 D_gLed gLed_sense_mid n2 LED_GREEN
@@ -1267,7 +1267,7 @@ R_autopull_n4 n4 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > mega-multi-led 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > mega-multi-led 1`] = `
 "* Velxio circuit
 V_led0_sense n9 led0_sense_mid DC 0
 D_led0 led0_sense_mid n8 LED_RED
@@ -1315,7 +1315,28 @@ R_autopull_n16 n16 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > mosfet-pwm-led 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > mixed-and-transistor-driver 1`] = `
+"* Velxio circuit
+B_u1 n7 0 V = 5 * u(V(n0)-2.5) * u(V(n2)-2.5)
+R_u1_load n7 0 1Meg
+R_rb n7 n5 1000
+Q_q1 n3 n5 n4 Q2N2222
+R_rl n1 n6 220
+V_motor_sense n6 motor_sense_mid DC 0
+D_motor motor_sense_mid n3 LED_GREEN
+R_autopull_n0 n0 0 100Meg
+R_autopull_n1 n1 0 100Meg
+R_autopull_n2 n2 0 100Meg
+R_autopull_n3 n3 0 100Meg
+R_autopull_n4 n4 0 100Meg
+R_autopull_n6 n6 0 100Meg
+.model Q2N2222 NPN(IS=1E-14 VAF=100 BF=200 IKF=0.3 XTB=1.5 BR=3 CJC=8E-12 CJE=25E-12 TR=100E-9 TF=400E-12 ITF=1 VTF=2 XTF=3 RB=10 RC=.3 RE=.2)
+.model LED_GREEN D(Is=1e-22 N=1.9)
+.op
+.end"
+`;
+
+exports[`netlist snapshot — circuits (41 examples) > mosfet-pwm-led 1`] = `
 "* Velxio circuit
 R_rl n0 n4 220
 V_led1_sense n4 led1_sense_mid DC 0
@@ -1333,7 +1354,7 @@ R_autopull_n4 n4 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > multi-led-bar 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > multi-led-bar 1`] = `
 "* Velxio circuit
 R_r0 n0 n6 220
 R_r1 n1 n7 220
@@ -1370,7 +1391,7 @@ R_autopull_n10 n10 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > nand-sr-latch 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > nand-sr-latch 1`] = `
 "* Velxio circuit
 R_setBtn n5 n6 1000000000
 R_rstBtn n4 n6 1000000000
@@ -1392,7 +1413,7 @@ R_autopull_n6 n6 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > nano-sensor-station 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > nano-sensor-station 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_ntc_ntc vcc_rail n1 11441.484668193882
@@ -1403,7 +1424,7 @@ R_ldr_pull n0 0 10000
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > npn-led-switch 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > npn-led-switch 1`] = `
 "* Velxio circuit
 R_rb n1 n4 1000
 R_rc n0 n5 220
@@ -1422,7 +1443,7 @@ R_autopull_n5 n5 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > ntc-temperature 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > ntc-temperature 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_ntc_ntc vcc_rail n0 10000
@@ -1431,7 +1452,7 @@ R_ntc_pull n0 0 10000
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > opamp-comparator 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > opamp-comparator 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_pot_top vcc_rail n0 10000
@@ -1492,7 +1513,7 @@ RL3 22 28 100K
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > opamp-difference 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > opamp-difference 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_r1 n0 n2 10000
@@ -1553,7 +1574,7 @@ RL3 22 28 100K
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > opamp-inverting 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > opamp-inverting 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_pot_top vcc_rail n0 10000
@@ -1612,7 +1633,7 @@ RL3 22 28 100K
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > opamp-schmitt-trigger 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > opamp-schmitt-trigger 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_pot_top vcc_rail n0 10000
@@ -1671,7 +1692,7 @@ RL3 22 28 100K
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > opamp-voltage-follower 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > opamp-voltage-follower 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_pot_top vcc_rail n0 10000
@@ -1726,7 +1747,7 @@ RL3 22 28 100K
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > optocoupler-signal 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > optocoupler-signal 1`] = `
 "* Velxio circuit
 R_rled n1 n2 270
 D_u1_led n2 u1_mid DLED_OPTO
@@ -1744,7 +1765,7 @@ R_autopull_n4 n4 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > parallel-resistors 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > parallel-resistors 1`] = `
 "* Velxio circuit
 R_rs n0 n2 10000
 R_r1 n2 n1 10000
@@ -1757,7 +1778,7 @@ R_autopull_n2 n2 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > photoresistor-light 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > photoresistor-light 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_ldr_ldr vcc_rail n0 285714.28571428574
@@ -1766,7 +1787,7 @@ R_ldr_pull n0 0 10000
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > pnp-high-side-switch 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > pnp-high-side-switch 1`] = `
 "* Velxio circuit
 R_rb n0 n4 1000
 R_rl n2 n5 220
@@ -1785,7 +1806,7 @@ R_autopull_n5 n5 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > pot-adc-reader 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > pot-adc-reader 1`] = `
 "* Velxio circuit
 V_VCC_RAIL vcc_rail 0 DC 5
 R_pot_top vcc_rail n0 10000
@@ -1794,7 +1815,7 @@ R_pot_bot n0 0 1
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > power-supply-7805 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > power-supply-7805 1`] = `
 "* Velxio circuit
 V_bat n0 bat_int DC 9
 R_bat_esr bat_int 0 1.5
@@ -1806,7 +1827,7 @@ R_autopull_n0 n0 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > rc-low-pass-filter 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > rc-low-pass-filter 1`] = `
 "* Velxio circuit
 R_r1 n0 n2 10000
 C_c1 n2 n1 0.000009999999999999999 IC=0
@@ -1817,7 +1838,7 @@ R_autopull_n2 n2 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > relay-led-switch 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > relay-led-switch 1`] = `
 "* Velxio circuit
 R_rb n1 n3 1000
 Q_q1 n5 n3 n2 Q2N2222
@@ -1843,7 +1864,7 @@ R_autopull_n6 n6 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > schottky-reverse-protection 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > schottky-reverse-protection 1`] = `
 "* Velxio circuit
 V_bat n0 bat_int DC 9
 R_bat_esr bat_int n2 1.5
@@ -1857,7 +1878,7 @@ R_autopull_n2 n2 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > voltage-divider 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > voltage-divider 1`] = `
 "* Velxio circuit
 R_r1 n0 n1 10000
 R_r2 n1 n2 10000
@@ -1868,7 +1889,7 @@ R_autopull_n2 n2 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > wheatstone-bridge 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > wheatstone-bridge 1`] = `
 "* Velxio circuit
 R_r1 n0 n1 10000
 R_r2 n0 n2 10000
@@ -1882,7 +1903,7 @@ R_autopull_n3 n3 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > xor-toggle-detector 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > xor-toggle-detector 1`] = `
 "* Velxio circuit
 R_sw1 n0 n5 1000000000
 R_sw2 n1 n5 1000000000
@@ -1901,7 +1922,7 @@ R_autopull_n5 n5 0 100Meg
 .end"
 `;
 
-exports[`netlist snapshot — circuits (40 examples) > zener-regulator 1`] = `
+exports[`netlist snapshot — circuits (41 examples) > zener-regulator 1`] = `
 "* Velxio circuit
 V_bat n0 bat_int DC 9
 R_bat_esr bat_int n2 1.5
diff --git a/frontend/src/data/examples-circuits.ts b/frontend/src/data/examples-circuits.ts
index 5906ac56..24d0a029 100644
--- a/frontend/src/data/examples-circuits.ts
+++ b/frontend/src/data/examples-circuits.ts
@@ -856,6 +856,47 @@ void loop() {
   // LOGIC GATES (6 examples)
   // ════════════════════════════════════════════════════════════════════════════
 
+  {
+    id: 'mixed-and-transistor-driver',
+    title: 'Mixed: MCU + AND gate + transistor (coexistence test)',
+    description:
+      'Coexistence of digital and analog in ONE circuit: the Arduino drives two ' +
+      'logic levels (one steady HIGH "enable", one blinking), a physical AND gate ' +
+      'combines them, and the AND output switches an NPN transistor that drives the ' +
+      '"motor" LED. The LED should blink — proving MCU -> logic gate -> transistor ' +
+      '-> load works through the digital and analog (ngspice) motors together.',
+    category: 'circuits',
+    difficulty: 'intermediate',
+    code: `// MCU + AND gate + transistor coexistence.
+// pin 5 = steady enable, pin 6 = blink. AND(5,6) -> transistor -> motor LED.
+void setup() { pinMode(5, OUTPUT); pinMode(6, OUTPUT); }
+void loop() {
+  digitalWrite(5, HIGH);                 // enable
+  digitalWrite(6, (millis() / 500) & 1); // ~1 Hz blink
+}`,
+    components: [
+      UNO,
+      { type: 'velxio-logic-gate-and', id: 'u1', x: 360, y: 120, properties: {} },
+      { type: 'wokwi-resistor', id: 'rb', x: 480, y: 130, properties: { value: '1000' } },
+      { type: 'wokwi-bjt-2n2222', id: 'q1', x: 580, y: 160, properties: {} },
+      { type: 'wokwi-resistor', id: 'rl', x: 560, y: 40, properties: { value: '220' } },
+      { type: 'wokwi-led', id: 'motor', x: 560, y: 100, properties: { color: 'green' } },
+    ],
+    wires: [
+      // MCU drives the two AND inputs
+      w('w1', ['arduino-uno', '5'], ['u1', 'A']),
+      w('w2', ['arduino-uno', '6'], ['u1', 'B']),
+      // AND output -> base resistor -> transistor base
+      w('w3', ['u1', 'Y'], ['rb', '1']),
+      w('w4', ['rb', '2'], ['q1', 'B']),
+      // Load: 5V -> Rl -> LED -> collector ; emitter -> GND
+      w('w5', ['arduino-uno', '5V'], ['rl', '1'], '#ff3030'),
+      w('w6', ['rl', '2'], ['motor', 'A']),
+      w('w7', ['motor', 'C'], ['q1', 'C']),
+      w('w8', ['q1', 'E'], ['arduino-uno', 'GND'], '#000000'),
+    ],
+  },
+
   {
     id: 'and-gate-alarm',
     title: 'AND Gate Alarm',