Circuits & Schematics Vishay

1. How to make a noise-free infrared obstacle detection module
   Hesam Moshiri
   Circuits Measurement Robots Vishay TSOP1738KA1
   An obstacle detection unit is an essential part of a variety of projects, such as robotics and security applications. The infrared sensors are widely used for these types of applications. The main drawback of some circuit designs is that the ...
   Apr 17, 2024
2. Oscillating Output Improves System Security
   Ana Gómez Jorge Marcos
   Circuits Automation Security Vishay IRFD110
   Many electronic-control systems have digital outputs that use transistors. One method of improving the security in these outputs is to use an oscillating signal to represent a logic-high state instead of a fixed voltage level (Figure 1). This type ...
   Dec 19, 2022

3. Isolated AC linear power control
   Sajjad Haidar
   Circuits Automation Supply Vishay VOM1271T
   Power control using the linear region of an active device, such as a MOSFET, is not an efficient option. However if the range of power control is restricted to the lower or upper end of the range, using the linear region is not a bad choice. For ...
   Apr 7, 2022
4. Delay Circuitry Controls Supply-Voltage Startup Sequence
   John Betten
   Circuits Supply Vishay SI2308DS Si2337DS
   For some ICs, supply voltages should be applied in a particular sequence. One example is the subscriber line interface circuit (SLIC), which, depending on the application, may require several negative and/or positive voltages. The larger voltages ...
   Dec 13, 2021
5. Automatic "Off" Switch Prevents Draining Car's Battery
   Paul Moffat
   Circuits Automotive Automation Supply Vishay IRF540
   I was using a thermoelectric cooler for a camping trip and discovered the next morning that my car battery was dead from the load. I never expected a 3.5-A load to drain the battery in eight hours. So I went about making a circuit that could be ...
   Dec 1, 2021
6. Triangle Waves Drive Simple Frequency Doubler
   Jim McLucas
   Circuits Oscillators Vishay 1N914 SD101
   If you use a function generator, you may occasionally require a sine-wave output at a higher frequency than the generator can provide. If your function generator also produces a triangle-wave output, you can use a frequency doubler to extend the ...
   May 26, 2021
7. Circuit makes simple high-voltage inverter
   Circuits Supply Power Vishay BYV26C BYV28-50 IRFP450 UF5406
   A simple high-voltage MOSFET inverter solves the problem of driving a high-side MOSFET, using a low-voltage transistor, Q 1 , and a special arrangement involving D 6 (Figure 1). This inverter is much faster than those that optocouplers drive, so ...
   Jan 26, 2021
8. Use an optocoupler to make a simple low-dropout regulator
   Circuits Supply Vishay SFH617A
   Marc Ysebaert EDN Although a monolithic low-dropout regulator has superior dynamic characteristics, the discrete regulator in this Design Idea is so simple that you can adapt it to many purposes. Using a common transistor, it has a dropout voltage ...
   Jun 14, 2018
9. Achieve simple IR-data transmission from a PC's serial port
   Andreas Grün
   Circuits Interfaces Vishay TSOP17
   Often, you need to transmit a couple of bits or bytes of data to a microcontroller without a direct cable connection. One simple way to achieve this goal is to use a widely available IR receiver, such as a TSOP17xx or similar receiver from Vishay ...
   May 23, 2018
10. Simple toggle circuits illustrate low power-MOSFET leakage
    Circuits Analogue Design Vishay IRF530 SI4490DY
    Tom Bruhns EDN The novelty circuit in Figure 1 illustrates the extremely low gate-leakage current typical of modern power MOSFETs. You can find parts that, in a moderately dry environment, will hold their state for days at a time. In operation, if ...
    Mar 11, 2018

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