Free electronic circuit design and schematic diagram
Below is video tutorial about PC based control. PC based control is widely used in proses automation, machine controllers, industrial controllers and PLC. PC is developed in early 1990 when the chip processor is very expensive. The chip need special handling like special power supply and cooling. Intel and AMD have realized they can used a standard PC for controlling. […]
Read moreBelow is video tutorial about basic of level measurement. As we know, we have been measuring level since the days of the Pharaoh, but why is it still so hard? That’s because most process engineer do not think level is control function but process function. Control Editor in Choef Walt Boyes will explain about the basic of measuring level and […]
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Below is a schematic diagram of blocking monostable circuit. The normal state of the transistor is off because the 10 k resistor has been removed. The conduction will be started using a positive pulse at node “a” and the transformer will do the rest. The transistor will again be turned off (by a hefty negative pulse to the base) after […]
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Circuit below is circuit of a transistor blocking oscillator. The transformer is phased. This cause any increase in collector current pulls the base up, further increasing the current. The transformer may the the most appropriate but not the most optimum. Any fluctuation in the collector current is fed back and reinforced because the 10k resistor biases the transistor. The base […]
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The UJT below is configured to produce a sawtooth wave at a frequency of 104 Hz. The capacitor begins to charge through the 4.7 kOhm resistor when the circuit is initially powered up. The current suddenly flows from the UJT emitter (E) to the UJT Base (B1) when the voltage across the capacitor rises to a certain point. This will […]
Read moreBelow is video tutorial about ADC architecture. This video discuss about the advantage and disadvantage of 3 ADC architecture. First is the approximation ADC. This ADC is widely used for medium resolution and medium speed. The second architecture is used for extremely high resolution . They are curerntly used in application like measurement, voice band, and radio. Finally, the third […]
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Below is a classic tone stack from the Big Muff distortion pedal. Basically, it’s a pair of filters whose output is combined through the 100k mix pot. The 39k/.01 filter attenuates the highs and only passes low frequency. But, the 3900pF/22k filter does the opposite. This filter passes the high frequency and filters out the lows. The 100k pot blends […]
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