• LED Azul (MN13-1001)) x2
• LED Blanco (C512A-WNS/WJ))
• LED Amarillo (CTL1206FYW1T) x2
• Dos pilas de 3V en serie (total 6V) (1070TR))
• Resistencias adecuadas para cada nuevo LED, calculadas según la siguiente fórmula:
  $R = \frac{V_{CC} - V_F}{I_F}$
  Donde $V_{CC}$ es el voltaje de las pilas (6V), $V_F$ es el voltaje de avance del LED, y $I_F$ es la corriente de funcionamiento del LED. Asumimos corriente típica de funcionamiento de 20mA (0.02A).

• LED Azul: Consideramos un voltaje de avance típico $V_F = 3.3V$.
  $R_{\text{azul}} = \frac{6V - 3.3V}{0.02A} = 135\Omega \approx 150\Omega$
• LED Blanco: Consideramos un voltaje de avance típico $V_F = 3.2V$.
  $R_{\text{blanco}} = \frac{6V - 3.2V}{0.02A} = 140\Omega \approx 150\Omega$
• LED Amarillo: Consideramos un voltaje de avance típico $V_F = 2.0V$.
  $R_{\text{amarillo}} = \frac{6V - 2.0V}{0.02A} = 200\Omega \approx 220\Omega$

1. Resistencias (150Ω o 220Ω según se calculó) a la pata positiva ($+$) de las pilas.
2. Conexiones de LEDs:
   • LED Azul:
     • Conectar resistencia de 150Ω al ánodo (A) de los LEDs azules.
     • Conectar el cátodo (K) de los LEDs azules a los transistores correspondientes.
   • LED Blanco:
     • Conectar resistencia de 150Ω al ánodo (A) del LED blanco.
     • Conectar el cátodo (K) del LED blanco al transistor correspondiente.
   • LED Amarillo:
     • Conectar resistencia de 220Ω al ánodo (A) de los LEDs amarillos.
     • Conectar el cátodo (K) de los LEDs amarillos a los transistores correspondientes.
   • Nuevo circuito:

Plaintext
## Conexiones en el circuito original:
* Añadir resistencias como 'R3' (150Ω) y R4 (220Ω)

- Conectar (R3: P1) al positivo de los LEDs azules (LED3:A).
- Conectar (R3: P2) al cátodo de los LEDs azules (LED3:K).
- Conectar (R4: P1) al positivo del LED blanco (LED4:A).
- Conectar (R4: P2) al cátodo del LED blanco (LED4:K).
- Conectar (R5: P1) al positivo del LED amarillo (LED5:A).
- Conectar (R5: P2) al cátodo del LED amarillo (LED5:K).

... y actualizar el GND:
- Conectar GND de todas las resistencias al (-) de las pilas (GND).

Notas: 
- Asegúrate de que la batería sea de 6V.
- Las conexiones internas de transistores y otros componentes no se alteran.

Si necesitas agregar más detalles, ¡avísame!

• Capacitors (C1 and C2): 10µF capacitors, which are critical for timing the oscillation of the astable multivibrator.
• Resistors (R1 and R2): Each with a resistance of 47kΩ, these resistors, in combination with the capacitors, define the frequency of oscillation.
• Transistors (Q1 and Q2): MMBT3904 NPN transistors act as the switching elements. Their switching creates the astable multivibrator’s oscillating output.
• LEDs (LED1 and LED2): Serve as visual indicators for the circuit's operation.
• Battery (BATT1): Provides a 3.0V power supply to the circuit.

• Power Supply: BATT1 provides the required 3.0V to the circuit.
• Oscillation Creation: The charge and discharge cycles of capacitors C1 and C2, controlled by resistors R1 and R2, create the oscillation.
• LED Blinking: The square wave output toggles LEDs LED1 and LED2, making them blink in an alternating pattern.

• Net 44094b86cc25690e16b1f0565c2c455b: Connects the negative terminal of BATT1 to the emitter (E) pins of both Q1 and Q2.
• Net 4b05bb946658129000c5137bae88ac85: Connects the positive terminal of BATT1, anode (A) pins of both LEDs, and P1 pins of both resistors R1 and R2, indicating their connection to the power supply.
• Net a32cc1debb0bc6c1b55c0d6496892257: Links LED2’s cathode (K), the collector (C) of Q1, and the anode (A) of C1.
• Net 81006788c096422c935f78bdf97a4a7b: Connects the cathode (K) of C2, P2 pin of R2, and base (B) of Q1.
• Net 01f392eec5d93439f67176edcb055a0c: Ties together the anode (A) of C2, collector (C) of Q2, and cathode (K) of LED1.
• Net 3fc4c14d665e4882691d1ebec0243ffc: Joins the P2 pin of R1, cathode (K) of C1, and base (B) of Q2.

• Capacitors (C1 & C2): Both are specified with a capacitance value of 10μF and a maximum reverse voltage of 16V. These capacitors play a crucial role in determining the frequency of the oscillation in the astable multivibrator circuit.
• Resistors (R1 & R2): Both resistors have a resistance value of 47kΩ. In conjunction with the capacitors, these resistors help set the time constant for the charging and discharging cycles of the capacitors, thus influencing the frequency and duty cycle of the output waveform.
• LEDs (LED1 & LED2): These light-emitting diodes are designed to blink alternately, with a forward voltage of 1.7V. The blinking effect is the visual indicator of the circuit's oscillation.
• Transistors (Q1 & Q2): Both are MMBT3904 transistors, a type of NPN bipolar junction transistor (BJT), used here to switch the path of current in the circuit, effectively controlling the charging and discharging of the capacitors and thereby sustaining the oscillation.
• Battery (BATT1): Provides a power supply of 3.0V to the circuit. The source of DC power for the circuit's operation.

1. Astable Multivibrator Functioning:
   • The heart of the circuit is formed by the two transistors (Q1 and Q2), two capacitors (C1 and C2), and two resistors (R1 and R2) configured in such a way to generate a square wave without requiring any external triggering. The transistors alternately switch on and off, creating a feedback loop that oscillates.
   • The charging and discharging of C1 and C2 through R1 and R2, respectively, are responsible for the oscillation. When one capacitor charges through its associated resistor, the corresponding transistor is turned on, which in turn discharges the other capacitor, turning off the other transistor, and the cycle repeats.
2. LED Blinking Mechanism:
   • LED1 and LED2 are connected in such a way that they alternately turn on and off, corresponding to the oscillation of the multivibrator. This is achieved by the switching action of Q1 and Q2, which either allows or cuts off current to the LEDs.
3. Key Connections:
   • The negative terminal of BATT1 is connected to the emitters of both Q1 and Q2, establishing the ground reference for the circuit.
   • The positive terminal of BATT1 is connected through R1 to LED1 and through R2 to LED2, providing the power supply path.

1. Decrease the Resistor Value: Currently, LED1 is connected in series with resistor R1 according to the net 4b05bb946658129000c5137bae88ac85, which includes R1:(P1), LED1:(A),.... Decreasing the value of R1 will increase the current through LED1, thereby increasing its brightness. However, be cautious not to exceed the maximum current rating of LED1. Since you are using a 47kΩ resistor (R1), you could try a lower value, but ensure to calculate the current to keep it within the safe operating limits of the LED.
   For a rough calculation, if you know the forward voltage (Vf) of LED1 and your battery voltage (Vbatt), you can calculate the current using Ohm's law $I = \frac{Vbatt - Vf}{R}$ where R is the resistance in ohms. For LED1 with a forward voltage of 1.7V and assuming your battery voltage is 3.0V, the current with a 47kΩ resistor is approximately:
   $I = \frac{3.0V - 1.7V}{47000Ω} \approx 28\mu A$
   Reducing the resistor will increase this current, thereby increasing brightness. Ex: For a 22kΩ resistor:
   $I = \frac{3.0V - 1.7V}{22000Ω} \approx 59\mu A$
2. Increase the Battery Voltage: You are currently using a 3.0 V battery (BATT1). Increasing the battery voltage will also increase the current through LED1, making it brighter. However, this is limited by the specifications of your components, so you need to ensure all components can safely handle the increased voltage, especially the LEDs and the transistors (Q1, Q2).
3. Replace LED1 with a Higher Efficiency LED: If possible, consider using an LED with a higher luminous intensity (brightness) for the same forward current, or one that requires less current for the same level of brightness. This involves selecting an LED with a better lumens-per-watt rating but ensuring it matches your circuit's requirements, such as the forward voltage and current.
4. Pulse Width Modulation (PWM) Technique: Although more complex, PWM involves turning the LED on and off at a rate faster than the human eye can detect. By varying the duty cycle (the proportion of time the LED is on versus off), you can effectively control the perceived brightness of the LED without changing the current when it's on. This method requires additional circuitry or a microcontroller.

• (V_{batt}) = 3.0V (Battery voltage)
• (V_f) = 1.7V (Forward voltage of LED1)
• (R) = 47kΩ (Current resistor in series with LED1)

1. Original current through LED1:
   $I_{original} = \frac{3.0V - 1.7V}{47000Ω} \approx 28\mu A$
2. To increase the brightness by approximately 20%, we aim to increase the current by 20%. So the target current, (I_{target}), would be:
   $I_{target} = I_{original} \times 1.2 = 28\mu A \times 1.2 \approx 33.6\mu A$
3. Using our target current to find the new resistor value needed:
   $R_{new} = \frac{V_{batt} - V_f}{I_{target}} = \frac{3.0V - 1.7V}{33.6\mu A} \approx 38.69kΩ$

• Replace R1 with a 39kΩ resistor.

1. Open your project.
2. Navigate to the schematic where R1 is placed.
3. Select R1 by clicking on it.
4. Look for the properties panel (usually on the right side of the screen) where component parameters are displayed.
5. Find the resistance value (currently set to 47kΩ) for R1.
6. Change the value from 47kΩ to 39kΩ.
7. Save your schematic to apply the changes.

1. Update the BOM (Bill Of Materials) to reflect the change in resistor value. This ensures that when ordering components or manufacturing your PCB, the correct 39kΩ resistor is used.

1. Power down your circuit by disconnecting the battery or power supply to ensure a safe working environment.
2. Locate R1 in your circuit.
3. Desolder or remove the 47kΩ resistor (R1) from your circuit. When desoldering, use proper tools and follow safety precautions to avoid damaging other components or the PCB.
4. Obtain a 39kΩ resistor. Make sure it has the same or adequate power rating and package size for your application.
5. Insert and solder the new 39kΩ resistor in place of the original 47kΩ resistor.
6. Reconnect the power and test the circuit to verify that LED1's brightness has increased as expected.

• Capacitor (C1, C2): Almacena y libera energía eléctrica. En este circuito, son parte esencial para el funcionamiento del multivibrador astable, proporcionando los intervalos de tiempo que definen el parpadeo del LED.
• Resistor (R1, R2): Limita o regula el flujo de corriente eléctrica y divide el voltaje. Los resistores en este circuito, junto con los transistores, ayudan a controlar la carga y descarga de los capacitores, lo cual es esencial para mantener el circuito oscilando.
• LED (LED1, LED2): Diodo emisor de luz. Convierte la energía eléctrica en luz. En este circuito, se utilizan para indicar visualmente la oscilación del circuito multivibrador astable, es decir, parpadean.
• Transistor (Q1, Q2): Actúa como un interruptor o amplificador en un circuito. Aquí, los transistores se utilizan para alternar qué LED está encendido y cuál está apagado, permitiendo la oscilación del circuito.
• Batería (BATT1): Fuente de energía eléctrica. Proporciona la energía necesaria para que todos los componentes del circuito funcionen.

1. Component Exclusion from BOM (Bill of Materials):
   • Several components, specifically some pins from $C2$, $R1$, and $R2$, are marked with "Exclude from BOM: true". This typically signifies either a mistake in the project or an intentional design decision, such as using these pins for testing or non-standard purposes. Generally, all pins of a component are crucial for its functionality and should be included in the BOM unless there's a clear design rationale for exclusion.
2. Undefined Properties:
   • Some pins on $LED2$, $R2$, and $Q1$ have properties listed as "undefined: Route Branch Point". This could lead to confusion or errors in PCB layout or simulation. It's important to ensure that all properties, especially those critical for electrical and physical connections, are clearly defined.
3. Power Supply Considerations:
   • The battery ($BATT1$) specified has a voltage of 3.0V. Given that the LEDs ($LED1$ and $LED2$) have a forward voltage of 1.7V each and considering the voltage drop across the transistors and resistors, the circuit may work, but the margin is slim. Ensure that the battery voltage is sufficient to consistently drive the circuit, particularly as the battery depletes.
4. Resistor Values:
   • Both resistors ($R1$ and $R2$) have values of 47kΩ. While 47kΩ is a common value in many circuits, considering this is an astable multivibrator, the resistance value directly impacts the oscillation frequency and the LED blinking rate. Ensure these values meet your intended frequency and timing requirements.
5. Capacitance Values:
   • Both capacitors ($C1$ and $C2$) have a capacitance of 10µF, which, along with the resistors, will determine the frequency of the astable multivibrator. Make sure these values provide the desired oscillation frequency for your application.
6. Net Connections Check:
   • All mentioned net connections appear to comply with a standard astable multivibrator configuration. However, thorough verification of each net connection against the circuit's functional requirements is advised. This includes ensuring that each component is connected as intended for the circuit to operate correctly.
7. Component Ratings:
   • Ensure that the maximum reverse voltage rating of the capacitors and the voltage rating of other components like resistors and LEDs are not exceeded during circuit operation. Overlooking these ratings can lead to component failure.

• Transistores (Q1 y Q2): Actúan como los principales elementos de conmutación dentro del circuito multivibrador, alternando entre estados de conducción y corte.
• Resistencias (R1 y R2): Proporcionan polarización a los transistores y, junto con los condensadores, determinan la frecuencia de oscilación del circuito.
• Condensadores (C1 y C2): Junto con las resistencias, definen el tiempo que cada transistor permanecerá en estado de conducción, afectando la frecuencia y el ciclo de trabajo de la señal generada.
• LEDs (LED1 y LED2): Actúan como indicadores visuales, parpadeando en respuesta a la oscilación del circuito.
• Batería (BATT1): Proporciona la fuente de alimentación para el circuito.

1. Cuando el circuito se energiza, los transistores comienzan en estados iniciales aleatorios debido a ligeras diferencias en sus características o en el ruido ambiental.
2. Suponiendo que Q1 se sature primero (conduzca), este estado hará que C2 comience a cargarse a través de R2.
3. Cuando el voltaje en C2 alcanza un cierto umbral, Q2 empezará a conducir, lo que a su vez hará que Q1 se corte (deje de conducir).
4. Esto permite que C1 comience a cargarse a través de R1, y eventualmente, este cambio de voltaje hará que Q1 conduzca de nuevo, repitiendo el ciclo.

1. Capacitors: C1 and C2 (Würth Elektronik, 10uF)
2. Resistors: R1 and R2 (Stackpole Electronics Inc, 47k ohm)
3. LEDs: LED1 and LED2 (Venkel)
4. Transistors: Q1 and Q2 (MMBT3904 by MDD)
5. Battery: BATT1 (Keystone Electronics, 3.0V)

• Transistors Q1 and Q2 - These NPN transistors switch on and off alternately, creating a flip-flop effect. Each transistor's base is connected to the other's collector, hence causing the transistors to alternatively switch states.
• Capacitors C1 and C2 - These capacitors control the time it takes for each transistor to switch between states. The time depends on the RC time constant, given by $T = RC$ where T is the time constant, R is the resistance given by the resistors R1 and R2, and C is the capacitance value of C1 and C2.
• Resistors R1 and R2 - These resistors are connected to the base of the transistors Q1 and Q2 respectively, and along with C1 and C2, they determine the frequency of the output square wave.
• LEDs LED1 and LED2 - These LEDs will blink alternately, guided by the flip-flop action of the transistors.
• Battery BATT1 - This component provides the necessary voltage for the circuit to operate.

• C1 and C2 are capacitors with capacitance of 10uF. These two capacitors are used in the feedback loop of the multivibrator. They charge and discharge alternately, which helps in switching the states of the transistors Q1 and Q2.
• R1 and R2 are resistors with resistance of 47k Ohms. They determine the operation frequency of the multivibrator in combination with the capacitors C1 and C2.
• LED1 and LED2 are the Light Emitting Diodes. These devices light up when current runs through them. In this circuit, they blink alternately to indicate the oscillation periods.
• Q1 and Q2 are MMBT3904 transistors. They act as the switching mechanism in this multivibrator. The on and off states of these two transistors define the high and low states of the output square wave.
• BATT1 is the battery with a voltage of 3V which powers the circuit.

1. Transistors Q1, Q2 (MPN: MMBT3904): These are the active devices in the circuit that periodically switch states to generate the oscillation.
2. Resistors R1, R2 (MPN: RMCF0805JT47K0; 47k ohms): These resistors are connected to the transistors and help determine the frequency of oscillation.
3. Capacitors C1, C2 (MPN: 875105359001; 10uF): These capacitors are also crucial in determining the frequency of oscillation.
4. LEDs LED1, LED2 (MPN: CTL1206FYW1T): These LEDs will blink at the frequency generated by the circuit.
5. Battery BATT1 (MPN: 1070TR): This is the power source for the circuit.

• When power is applied, both transistors are in the same state, lets assume that both are OFF.
• Noise in the circuit causes one to turn ON before the other; assume Q1 turns ON first.
• When Q1 is ON, its collector current goes through R2 and LED2, causing LED2 to light up.
• The current also charges C2 which gradually increases the base current of Q2 (also connected to R2), slowly turning it ON.
• Once Q2 is ON, its collector current goes through R1 and LED1, turning on LED1. C1 begins charging and cuts off Q1 base current, forcing Q1 to turn OFF rapidly.
• The cycle repeats with C2 now discharging, which gradually decreases Q2 base current, repeating the cycle in reverse.

1. LED Azul: Típicamente, los LEDs azules tienen una caída de voltaje de aproximadamente 3.0 a 3.3V.
2. LED Blanco: Típicamente, los LEDs blancos tienen una caída de voltaje de aproximadamente 3.0 a 3.3V.
3. LED Amarillo: Típicamente, los LEDs amarillos tienen una caída de voltaje de aproximadamente 2.0 a 2.2V.

• Cada pila va a proporcionar 3V. Conectadas en serie, entregan un voltaje total de 6V.

• Forward Voltage: 3.0V

• Forward Voltage: 3.0V

• Forward Voltage: 3.0V

• Forward Voltage: 2.0V

• Forward Voltage: 2.0V

• Conectar LED1 según las conexiones actuales y usar un resistor de 150Ω.

• Conectar LED2 según las conexiones actuales y usar un resistor de 150Ω.

• Conectar NEW_LED_WHITE:A a BATT1: (+) usando un resistor de 150Ω y NEW_LED_WHITE:K a Q1:C.

• Conectar NEW_LED_YELLOW1:A a BATT1: (+) usando un resistor de 200Ω y NEW_LED_YELLOW1:K a Q2:C.

• Conectar NEW_LED_YELLOW2:A a BATT1: (+) usando un resistor de 200Ω y NEW_LED_YELLOW2:K a R1:P1.

• Connectar BATT1 en serie para obtener 6V:
  • BATT1: (+) a Punto de conexión.
  • Punto de conexión a BATT2:(-).

1. New LED Blanco:
   • MPN: Algún LED blanco. Forward voltage: 3.0V. Designador: LED3
   • Resistor: 150Ω. Designador: R3
2. New LED Amarillo 1:
   • MPN: Algún LED amarillo. Forward voltage: 2.0V. Designador: LED4
   • Resistor: 200Ω. Designador: R4
3. New LED Amarillo 2:
   • MPN: Algún LED amarillo. Forward voltage: 2.0V. Designador: LED5
   • Resistor: 200Ω. Designador: R5
4. Batería adicional para conexión en serie con BATT1:
   • MPN: 1070TR. Voltage: 3.0V. Designador: BATT2

• R6: 150Ω para LED1
• R7: 150Ω para LED2

• Baterías en serie:
  • Conectar BATT1:(+) a P1.
  • Conectar P1 a BATT2:(-).

• Connect $R3:1$ a BATT2:(+).
• Connect $R3:2$ a $LED3:A$.
• Connect $LED3:K$ a $Q1:C$.

• Connect $R4:1$ a BATT2:(+).
• Connect $R4:2$ a $LED4:A$.
• Connect $LED4:K$ a $Q2:C$.

• Connect $R5:1$ a BATT2:(+).
• Connect $R5:2$ a $LED5:A$.
• Connect $LED5:K$ a $R1:P1$.

• Connect $R6:1$ a R1:P1.
• Connect $R6:2$ a $LED1:A$.
• Connect $R7:1$ a R2:P1.
• Connect $R7:2$ a $LED2:A$.

• Connect BATT1:(-) a Q2:(E), Q1:(E), BATT2:(-)

1. Añadir nuevos componentes:
   • Añadir tres nuevos LEDs: LED3, LED4, LED5.
   • Añadir cinco nuevos resistores: R3, R4, R5, R6, R7.
   • Añadir una nueva batería: BATT2.
2. Actualizar conexiones:
   • Hacer las nuevas conexiones según las indicaciones.

Plaintext
LED3: LED blanco, 3V forward voltage.
LED4: LED amarillo, 2V forward voltage.
LED5: LED amarillo, 2V forward voltage.
R3: 150Ω resistor.
R4: 200Ω resistor.
R5: 200Ω resistor.
R6: 150Ω resistor.
R7: 150Ω resistor.
BATT2: Segunda batería de 3V para ser conectada en serie con BATT1.

1. Conexión de las baterías en serie:
   • Conectar BATT1:(+) a una nueva unión (denominémosla P1).
   • Conectar P1 a BATT2:(-).
   • Conectar BATT2:(+) al resto del circuito donde previously BATT1:(+) estaba conectado.
2. LED Blanco (LED3) y su resistencia:
   • Conectar R3:1 a BATT2:(+).
   • Conectar R3:2 a LED3:A.
   • Conectar LED3:K a Q1:C.
3. LED Amarillo 1 (LED4) y su resistencia:
   • Conectar R4:1 a BATT2:(+).
   • Conectar R4:2 a LED4:A.
   • Conectar LED4:K a Q2:C.
4. LED Amarillo 2 (LED5) y su resistencia:
   • Conectar R5:1 a BATT2:(+).
   • Conectar R5:2 a LED5:A.
   • Conectar LED5:K a R1:P1.
5. LED Azul 1 (LED1) y su resistencia:
   • Conectar R6:1 a R1:P1.
   • Conectar R6:2 a LED1:A.
6. LED Azul 2 (LED2) y su resistencia:
   • Conectar R7:1 a R2:P1.
   • Conectar R7:2 a LED2:A.
7. Conexión de GND:
   • Conectar BATT1:(-) a Q2:E, Q1:E, y BATT2:(-).

• Conexión de Baterías:
  • Connect BATT1:(+) a P1.
  • Connect P1 a BATT2:(-).
• Resistor y LED Blanco:
  • Connect R3:1 a BATT2:(+).
  • Connect R3:2 a LED3:A.
  • Connect LED3:K to Q1:C.
• Resistor y LED Amarillo 1:
  • Connect R4:1 a BATT2:(+).
  • Connect R4:2 a LED4:A.
  • Connect LED4:K to Q2:C.
• Resistor y LED Amarillo 2:
  • Connect R5:1 a BATT2:(+).
  • Connect R5:2 to LED5:A.
  • Connect LED5:K to R1:P1.
• Resistor y LED Azul 1:
  • Connect R6:1 to R1:P1.
  • Connect R6:2 to LED1:A.
• Resistor y LED Azul 2:
  • Connect R7:1 to R2:P1.
  • Connect R7:2 to LED2:A.
• Conexión de GND:
  • Connect BATT1:(-) to Q2:E, Q1:E, y BATT2:(-).