Free electronic circuit design and schematic diagram
This is a Water Level Indicator with alarm circuit. This circuit is used to indicate the amount of water present in the overhead tank. Not only that, but this circuit also gives an alarm when the tank is full. CD4066 is used to indicate the level of the water through LEDs. Here is the schematic diagram of the circuit: The […]
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This is Thevenin equivalent tutorial video part 4. This video shows how to calculate Thevenin equivalent with control source and an independent source using current loop. In this video, to calculate the Thevenin voltage Ref and V1 are used. First, the circuit is tested using open circuit test to obtain Voc. Then, to obtain Isc, the circuit is tested in […]
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This is Thevenin equivalents video tutorial part 3. This video shows how to calculate Thevenin equivalents with control source and an independent source. IN this video, the Thevenin voltage between p and q is calculated using open circuit test. In this video, circuit maker is used to calculate the Voc. When the circuit running, Voc is obtained about 4.179V. To […]
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This is Thevenin equivalents video tutorial part 2. This video shows another way to calculate Thevenin equivalents on the open circuit. In this video the Thevenin equivalents is calculated using two current loop. From first loop, the result of V1 is 12.75V. Voc can be calculated using V1, and the result is 10.88V. Besides that, in this video also shown […]
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This is Thevenin equivalents video tutorial part 1. This video describes about the basic of Thevenin equivalents. This video shows how to calculated thevenin voltage and Thevenin resistance. The Thevenin resistance can be calculated by dividing the thevenin voltage with current. So we can simplify the circuit using Thevenin equivalent. View this video on Youtube
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This is a decibel meter circuit. This circuit is used to measure sound pressure level (SPL) from about 60 to 70 dB. In this circuit, transistor stage and one LM324 op-amp section are used to amplify the sound that is picked up by an 8 ohm speaker. As voltage comparators, the circuit uses The remaining 3 sections of the LM324 […]
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This is a circuit of Frequency Doubler using 4011. This circuit uses one CMOS quad, two input NAND gate package type 4011. This circuit consist of two differentiating networks R1/C1, R2/C2, an inverter IC1B and NAND gate IC1A, IC1D, IC1C and function as input and output buffers. Figure below shows the schematic diagram of the circuit and the pulses in […]
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