Free electronic circuit design and schematic diagram
This is a video tutorial of desoldering. This video shows the technique of desoldering the IC. The wrong technique will cause the overheating to the IC. There are two thing that are required to desolder the IC, they are solder and solder sucker. That would be easy if we use the solder in the left hand and the solder sucker […]
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Effect on the system’s time-domain response is a common problem when designing lowpass filters. The system may fail to recognize significant changes in time because pushing the cuttoff frequency lower slows the step response. The circuit below is presented to solve the problem: On this circuit diagram, lower cuttoff frequency is allowed without sacrificing the step-response time. The delta (difference) […]
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The diode-OR connection is the simplest link between backup battery and a main supply with a load. But, when the battery voltage is greater than main supply voltage, it will not work. To solve this problem we can use the circuit below. Here is the circuit : This circuit has the backup supply of 9V battery and main switch-mode supply […]
Read moreThis video is a tutorial of lamp dimmer using PWM. This video shows the use of PWM for lamp dimmer. In this video, the PWM kit uses a 555 IC. The brightness of the lamp is dimmed by changing the pulse. If we up the pulse slowly, the intensity of the lamp getting brighter. Here is the video :
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There are two types of highly integrated boost converters, the TPS61081 and TPS61080. Both of them require low input voltage of 2.5V and the output is adjustable up to 27 V. The TPS61080’s current limit rating of the integrated power switches is 0.5 A and 1.3 A for TPS61081. Here is the circuit : It is useful for industrial application […]
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This is a Colpitts-crystal oscillator circuit. It is suitable for low frequency crystal oscillator circuits. Using the 2N3823 JFET, this circuit has excellent stability because the temperature will not vary the 2N3823 JFET circuit loading. Here is the circuit : [Source: National Semiconductor Application Note]
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With very low harmonic distortion, 2N4416 JFET is suitable to smoothly oscillate in a circuit. On application where low harmonic content is required for a good mixer circuit, JFET local oscillator is very good. Below is the circuit diagram of Low Distortion Oscillator: And here’s the 20 MHz Oscillator Values C1 = 700 pF L1 = 1.3 mH C2 = […]
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