Circuits & Schematics Texas Instruments - 10

91. Single switch controls digital potentiometer
    Chuck Wojslaw Gary M Craig
    Circuits Analogue Design Interfaces Digital Texas Instruments SN74HC132
    The control of electronic potentiometers in most today's applications comes from controller-generated signals. However, a significant number of applications exist that require adjustments using manual, front-panel controls. The circuit in ...
    Sep 21, 2023
92. An LED display adapted for DIY projects
    Peter Demchenko
    Circuits Microcontrollers Usage Digital Texas Instruments CD74HC137 CD74HC259
    This expandable LED display for a microcontroller in Figure 1 has a simple interface with only 6 data/control wires and can be easily accommodated to a DIY design. The display has static indication. Figure 1. The expandable LED display for a ...
    Sep 14, 2023

93. 1-IC design monitors ajar doors
    Fred Hicks
    Circuits Automation Beginners Texas Instruments CD4011B
    If someone in your family has the habit of not completely closing a drawer or perhaps the food freezer’s door you’ll appreciate this design. It senses an ajar door and, if the situation isn’t corrected within 20 sec, sounds a ...
    Sep 6, 2023
94. Current-sense monitor and MOSFET boost output current
    Gyula Diószegi János Nagy
    Circuits Supply Texas Instruments TLC271
    A previous Design Idea describes a programmable current source that used a three-terminal LM317 adjustable regulator (Reference 1). Although that circuit lets you program the output current, the load current flowed through the BCD ...
    Aug 31, 2023
95. Fast(er) frequency doubler with square wave output
    Jim McLucas
    Circuits Signal Processing, Filters Texas Instruments SN74LVC1G74 SN74LVC1G86 TLV3501 TLV9052
    Whenever I find myself harboring a constantly nagging thought, I know I will eventually have to get busy and find a way to put it to rest. When I read EDN’s Design Ideas, I look for the range of frequencies over which the circuit will ...
    Aug 24, 2023
96. Dual RRIO op amp makes buffered and adjustable triangles and square waves
    Stephen Woodward
    Circuits Oscillators Texas Instruments TLV2372
    Rail-to-rail input and output (RRIO) op amps, both FET and BJT, have been around for a long time, but the possibilities they provide for versatile waveshape generation with simple circuits can still surprise. Figure 1 is an example, outputting a ...
    Aug 17, 2023
97. Use a photoelectric-FET optocoupler as a linear voltage-controlled potentiometer
    Sajjad Haidar
    Circuits Analogue Design Texas Instruments LM358A
    You can use a photoelectric FET as a variable resistor or a potentiometer in combination with a fixed resistor. The H11F3M photoelectric FET has an isolation voltage of 7.5 kV, enabling you to safely control high-voltage circuit parameters. The ...
    Aug 14, 2023
98. Low power voltage-to-frequency converter makes a wireless probe for testing an inductive power supply
    Eliane Garnier Francis Rodes Salma Alozade
    Circuits Wireless Measurement Supply Texas Instruments LMC7211
    Powering portable telemetry systems for long-term monitoring presents interesting design challenges. Batteries are unsuitable for certain critical applications, and, in these circumstances, designers typically use wireless inductive links to ...
    Aug 3, 2023
99. Sine reference is synchronous with ac line
    P Seshanna
    Circuits Analogue Design Supply Texas Instruments LM358
    Many applications require a sinusoidal reference voltage synchronized to the ac line voltage. You cannot derive such a reference voltage directly from the ac line because the waveform of the ac line is distorted because of nonlinear loads connected ...
    Jul 31, 2023
100. Light a white LED from half a cell
     Anthony Smith
     Circuits Supply Light Texas Instruments SN74AUC1G14
     Whether you use them as indicators or to provide illumination, LEDs are hard to beat in efficiency, reliability, and cost. White LEDs are rapidly gaining popularity as sources of illumination, as in LCD backlights, but with forward voltages ...
     Jul 20, 2023

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