The shape and pinout
Leg 1: connect mass
Leg 2: Trigger input (input pulses)
Leg 3: Out put (output)
Leg 4: Reset (reset)
Leg 5: Control voltage (voltage control)
legs 6: threshold (threshold - threshold)
leg 7: discharge (discharge)
leg 8: connect Vcc
+ Pin 1 (GND) GND connection to retrieve the IC supply line, also known as the foot or leg joint.
+ Pin 2 (TRIGGER): This is a foot lower input voltage comparator and is used as the first leg of the first latch input or frequency than comparable ap.Mach here PNP transistors used with standard voltage level is 2 / 3Vcc .
+ Pin 3 (OUTPUT): truth is truth to get out the logic signal. The status of the output signal is determined according to the level 0 and 1. 1 is that it corresponds to a high of nearly equal Vcc if (PWM = 100%) and a 0 is equivalent to 0V but in fact this level 0 not be 0V but it ranges from (12:35 -> 0.75V).
+ Pin 4 (RESET): Use the state norm. When the connector pins 4 masse, the output is low. When connected to a pressure 4 feet high, depending on the state of the output voltage on pins 2 and 6. but that in order to create oscillating circuits commonly connected to Vcc pins.
+ Pin 5 (VOLTAGE CONTROL): use alter the standard voltage IC 555 in accordance with the transformer outside or use external resistor connected to GND. This leg could not connect but also for noise reduction is often connected to GND pin 5 through 0.01uF to 0.1uF capacitor from the noise filter capacitors and voltage keep stable standards.
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