Free electronic circuit design and schematic diagram
Typical circuit for welding equipment shown on the following circuit diagram. Turn on delay can be controlled accurately with Potentiometer P2. We can discharge C1 at each line zero voltage using DB1 diode bridge and R6-R7 resistors. The voltage charge will be reset at each new half line cycle and the turn-on delay will be maintained the same. Through both […]
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We can use this circuit diagram to adjust the speed of a low-power induction motor, such as those which can be found in fan application. The function of capacitors C1, C2 and C4 is to filter the noise coming from TRIAC commutations. X2 technology is used for C2 capacitor whereas Y2 technology is used for C1 and C4 capacitors. Here’s […]
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A step-down circuit used to approximately divide by two the rms voltage between the line input and the inductive load (L1) is shown on circuit diagram below. A turn-on delay of approximately 7 ms is provided by C2 and R3. We can discharge C2 at each line zero voltage using diode bridge, with diodes D1 and D2 and R2 resistor. […]
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Junction field effect transistors can give exceptionally low input currents when they are used on the input stage of an operational amplifier for ambient temperatures less than about 70’C. However, since it is no simple matter to diffuse high quality FET’s on the same chip as the amplifier , there is no monolithic FET amplifiers available now. Nonetheless, create a […]
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Almost all monolithic amplifiers have good loaded output voltage swings, delivering +-10V at 5 mA with +-15V supplies because they use class-B output stages. It would be require much more current from the integrated circuit, for example, to make the output transistor considerably larger. In addition, the rose dissipation could make troublesome thermal gradients on the chip rising as well […]
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The TDA7088T can be used in mono portable and pocket radios. This is a bipolar integrated circuit. Here’s one of the application circuit diagram: When a minimum of peripheral components (of small dimensions and low cost) is important, we can use TDA7088T. Frequency-locked -loop (FLL) system with an Intermediate Frequency (IF) of about 70 KHz is built on this circuit. […]
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The circuit diagram below is a simple RS-485 circuit. Full-duplex communications (simultaneous transmission and reception) with only two essential packages (IC2 and IC3) is provided by this circuit. For high-noise environments or for long-distance transmission between a computer and it’s peripherals, the simple RS-485 balanced and differential data lines are necessary. Such transmission are difficult, if possible, using the single-ended […]
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