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ES:Control de motor DC con un PWM con un Timer 555.
El objetivo fue replicar la frecuencia de PWM que genera una salida analoga de un atarjeta Arduino de 500Hz. Por esta razon se seleciono el capacitor de 0.3 micro faradios y el pot de 10Kohms.
Ttotal=0.693*C*(Ra+Rb) como Ra+Rb es la resistencia total del pot1=0.00207seg aprox 481Hz, y con el diodo entre la parte central del pot y el capacitaro, para que al cargar pase solo por Ra parte del pot conectada a 12V, y al descargar pase por Rb seccion del pot entre descarga y capacitor. Las resistencias de 100Ohms son de proteccion.
Transistor bipolar NPN.
Primero 2N3904
Segundo potencia TIP122
EN: DC motor control with a PWM with a 555 Timer.
The objective was to replicate the PWM frequency generated by an analog output of a 500Hz Arduino board. For this reason, the 0.3 microfarad capacitor and the 10Kohms pot were selected.
Ttotal=0.693*C*(Ra+Rb) as Ra+Rb is the total resistance of the pot1=0.00207sec approx 481Hz, and with the diode between the central part of the pot and the capacitor, so that when charging it passes only through Ra part of the pot connected to 12V, and when discharging it passes through Rb section of the pot between discharge and capacitor. The 100Ohms resistors are for protection.
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