adel26 / Pulse Width Modulation (PWM) Controller

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Funcionamiento de Circuito PWM

flux

1:04

Aquí tienes un resumen de los componentes que deberías considerar adquirir para tu circuito PWM aplicado al motor de limpiaparabrisas:

Table

ComponenteFunción en el circuitoValor/EspecificaciónReferencia en Flux
LM555CMGeneración de la señal PWMAlimentado a 12 VLM555CM
Resistencia fija (para la red de temporización)Define el tiempo de carga del capacitor del 555Aproximadamente 4.7 kΩ (valor de ejemplo)Busca un resistor en la familia Res-0603-US-Template Simplified Footprint No Prop configurado a 4.7 kΩ
Resistencia variable / PotenciómetroAjuste del ciclo de trabajo (PWM)Idealmente 10 kΩ (aunque en el diseño actual se usa uno de 100 kΩ; se recomienda un rango menor para mayor precisión)P0915N-FC15BR100K (considera cambiarlo por uno de 10 kΩ si lo encuentras)
Capacitor para tiempo y desacopleEstablece la frecuencia y actúa como filtrado en la fuente del 555Un capacitor de 100 nF (puede ser para temporización y desacoplo)Busca un capacitor de 100 nF en el catálogo, por ejemplo usando la familia de Cap-0603-Template No Prop y selecciona la opción de 100 nF
Diodo de rueda libreProtección contra picos generados por el motor inductivo[1N4007W] (soporta hasta 1 A y 1000 V en inversa)1N4007W
MOSFETConmutación de la carga (control del motor)Debe tolerar picos de la carga; el [SIR680ADP] es adecuadoSIR680ADP
Notas adicionales:
  • Frecuencia y temporización: Con una red de 4.7 kΩ y un capacitor de 100 nF, la frecuencia aproximada se sitúa en el orden de 1 kHz (usando la fórmula del 555), lo cual es adecuado para esta aplicación.
  • Fuente de 12 V/1 A: Asegúrate de que el motor no supere el límite de corriente en condiciones normales y considera añadir protección (por ejemplo, un fusible) para evitar problemas ante picos.
  • Potenciómetro: Aunque el diseño actual emplea uno de 100 kΩ, para este uso se sugiere idealmente uno de 10 kΩ para tener un rango de ajuste más preciso y evitar que se conecte demasiada señal lenta.
Esta selección te ofrece una base sólida para transmitir una señal PWM controlada al motor de las plumillas. Si requieres detalles adicionales sobre la configuración o ajustes en la red de temporización, estoy aquí para ayudarte.
361 days
jamesletran

jamesletran

y ese capacitor de 100microfaradios es electrolitico? debo conectarlo paralelo al motor o en el 555
360 days

flux

0:23

El capacitor de 100 µF suele ser electrolítico y, en este contexto, se utiliza típicamente para estabilizar la fuente de 12 V (filtrado de rizado) o amortiguar picos de tensión en el sistema del motor, no para la red de temporización del LM555. Es decir:
  • Para el temporizador (LM555):
    Se recomienda usar un capacitor de bajo valor, como 100 nF, que se coloca cerca de la alimentación del 555 para desacoplar y definir la frecuencia.
  • Para la alimentación/motor:
    Un capacitor electrolítico de 100 µF se conecta en paralelo a la entrada de alimentación (entre +12 V y GND) para suavizar la tensión y ayudar a absorber picos o caídas cuando el motor arranca o se detiene.
En resumen, el capacitor de 100 µF no se conecta “en el 555” sino en paralelo a la fuente o al motor, según el propósito de filtrado de la tensión.
Confirmación y clarificación
Consulta sobre inrush
Decisión de conexión
Verificación de ubicación
360 days
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PWM_OUT
RV1
PWM_OUT
C2
Not Recommended for New Designs
Capacitance
47nF
PWM
LED1
R3
Resistance
10kΩ
R1
Resistance
1kΩ
PWM_OUT
C1
Capacitance
10nF
VIN
VIN
R4
Resistance
10kΩ
VIN
D3
D2
IC1
Not Recommended for New Designs

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Pulse Width Modulation (PWM) Controller

Pulse Width Modulation (PWM) Controller thumbnail
This project is a Pulse Width Modulation (PWM) Controller, built around an LM555 timer IC. It controls a load connected to a MOSFET, with adjustments via a potentiometer, and uses capacitors, resistors and diodes for various functions. #PWM #controller #project #Template #projectTemplate

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