Circuits & Schematics Texas Instruments

1. Use a 555 timer as a switch-mode power supply
   Circuits Supply Texas Instruments LM555 LM556 LF411
   Aaron Lager EDN Most switch-mode power supplies rely on a PWM (pulse-width-modulated) output that is controlled via voltage feedback. A 555-timer IC can inexpensively perform PWM. The circuit in Figure 1 shows how to turn a 555 PWM circuit into an ...
   02-03-2020
2. Low-power CMOS oscillator has push-pull output
   Circuits Oscillators Texas Instruments CD74HC14
   Shyam Tiwari EDN Digital oscillators often generate TTL- or CMOS-level outputs, referred to ground. Generating a symmetric bipolar output with respect to ground presents a challenge. In this design, four 1.5 V flashlight cells create 3 V voltage ...
   10-02-2020
3. Simple Circuit Turns PWM Into A Digitally Adjustable Precision Reference
   Circuits Supply Texas Instruments LM431
   Rick Mally Electronic Design The circuit uses the ubiquitous LM431 shunt regulator to implement a second-order Sallen-Key low pass filter together with a level shifte. Designs frequently require the conversion of a microprocessor’s pulse ...
   25-01-2020
4. Single-Chip Circuit Delivers Direction Information In Encoders
   Circuits Measurement Texas Instruments SN74HC14 SN74HC74
   Guido Nopper Electronic Design Incremental-rotation or linear encoders are very common, but normally they do not provide a direction signal. This design shows an easy way to detect forward or reverse direction. Incremental encoders normally provide ...
   30-12-2019

5. Create A 12-V Split Rail From A 5-V Bias
   Circuits Supply Texas Instruments LM5001
   Robert M. Hanrahan Electronic Design With digital semiconductor technology driving system power supplies to lower voltages for higher performance and lower system power, sensitive analog sensor circuits face a growing problem. Much of the inherent ...
   08-11-2019
6. Diodes derive logarithms and exponentials to optically sense AC/DC current
   Circuits Analogue Design Measurement Texas Instruments LM324
   Stephen Woodward EDN In theory, the design of current sensing circuitry, typically based on simple measurement of the IR voltage developed across a resistor placed in series with the current to be sensed, looks like an easy task. In theory. But in ...
   20-10-2019
7. Single-button lock provides high security
   Circuits Security Digital Texas Instruments CD4017B CD4019B CD4072B CD4093B CD4538BC
   Maxwell Strange EDN Figure 1 is the block diagram of an easily programmed, single-button combination lock. You operate the lock by using a series of short and long pulses from a momentary switch that masquerades as a doorbell button. The circuit ...
   03-10-2019
8. RGB Video-Sync Separator Interfaces VGA Monitor Using Basic Components
   Circuits Video Texas Instruments CD74HC14 CD74HC86
   Dave Conrad Electronic Design By providing simultaneous output of composite video, this video-sync separator design offers an alternate method for providing horizontal (H) and vertical (V) sync signals that support RGB video output to ...
   01-10-2019
9. Reliable 555 timer doesn't falsely trigger
   Circuits Texas Instruments LM555
   John Dawson EDN Circuits employing the popular 555 timer circuits are often reliable under many conditions. When you use them in electrically noisy environments, however, the timer can produce a false trigger, no matter how well you filter its ...
   18-09-2019
10. Generate Noisy Sine Waves with a Sound Card
    Circuits Audio Oscillators Measurement Texas Instruments LM386
    José M Miguel EDN Testing audio-noise-reduction circuits, PLLs (phase-locked loops), and audio-frequency filters may require a noisy sine wave, one that is summed with white noise. Using a typical computer sound card, free software, and an ...
    03-09-2019

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