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control de temperatura LM335 con operacionales ajuste 10mVoltios
2y
Sure, I can guide you through designing a temperature control circuit using the LM335 temperature sensor and an operational amplifier. The LM335 delivers 10mV per Kelvin, so you can use this for Celsius measurement directly. If you're looking to have an adjustable range, you could incorporate a potentiometer.
Here are the components you'll need for this design:
- LM335 Temperature Sensor
- Op-amp, such as the LM358
- Resistor for the LM335 Kelvin to Celsius Conversion (10kΩ typically)
- A Potentiometer for calibrating the output (value would depend on the adjustment range)
And here is a basic connection scheme:
- Connect the anode of the LM335 to the +Vcc supply. Connect the cathode to one end of a 10kΩ resistor. Connect this same end also to an ADC input of a microcontroller if you need a digital signal for further use.
- Connect the other end of the 10kΩ resistor to the ground. This will also serve as our analog temperature signal.
- To use the op-amp for amplifying this signal to a useable extent, power your LM358 from the same +Vcc and ground. Connect the inversing (-) input to the junction of the 10kΩ and the LM335.
- Connect the non-inverting (+) input of the LM358 to one terminal of your potentiometer. The Center terminal of the potentiometer is connected to the Ground. The other terminal decides the limit to which potential adjustment will go.
- Connect the output of the op-amp to where you need your temperature signal.
Please let me know if you need to interface this to a MCU or digital system, as there are some considerations for the Digital-Analog Conversion process.
2y
1
; control de temperatura lm35
2y
El LM35 es un sensor de temperatura lineal cuyo voltaje de salida varía linealmente con la temperatura. El voltaje de salida puede ser utilizado como una señal analógica que puede ser leída por un microcontrolador o estar conectada a un comparador para un sistema de control sencillo.
Aquí hay un ejemplo de cómo podrías conectar el LM35 (U1) y el LM741 (U2), que se puede utilizar como comparador, para un control de temperatura básico.
El LM35 tiene tres terminales:
- "+VS" (terminal de suministro de voltaje)
- "GND" (tierra)
- "Vout" (voltaje de salida)
La conexión sugerida es la siguiente:
- Conecta el terminal "+VS" de LM35 (U1) a tu fuente de voltaje.
- Conecta la terminal "GND" de LM35 (U1) a la tierra de tu sistema.
- Conecta la terminal de salida "Vout" de LM35 (U1) al terminal no inversor "+" del LM741 (U2).
Ahora, el LM741. Es un amplificador operacional, pero en este caso se utilizará como comparador de voltaje:
- Conecta el terminal "V-" del LM741 (U2) a la tierra.
- Una resistencia y un potenciómetro se pueden usar para crear un divisor de voltaje en el terminal inversor "-" del LM741 (U2). Esto actuará como el umbral de temperatura.
- El terminal "V+" del LM741(U2) se conecta a una fuente de voltaje.
- El terminal "OUTPUT" del LM741(U2) dará la salida de tu control de temperatura.
Ten en cuenta que este es un control básico y podrías necesitar complementarlo con otras funciones como una alarma de alta temperatura o un sistema de enfriamiento automáticamente controlado. Estas funciones adicionales podrían requerir más componentes como transistores, relés o un microcontrolador.
2y
3
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luiswhv
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Voutdel IC U1, que puede proporcionar una salida lineal de 10mV/°C. Para obtener una salida de 1V/°C, necesitamos un amplificación de 100 veces.+VSdel LM35CZ/NOPB (U1) a tu fuente de alimentación.GNDdel LM35CZ/NOPB (U1) a tierra.Voutdel LM35CZ/NOPB (U1) al pata+(entrada no inversora) del amplificador operacional LM741 (U2).Terra(-) de U2 a tierra.V+de U2 a tu fuente de alimentación.OUTPUTy la entrada-) y R2 (conectada entre la entrada-y GND). Para obtener una ganancia de 100, podemos seleccionar R2 de 10KΩ y R1 de 1MΩ. Las ganancias exactas pueden variar.