Circuits & Schematics: Design - 5

41. One microcontroller pin drives two LEDs with low quiescent current
    Antonio Muñoz Arturo Mediano
    Circuits Microcontrollers Usage Nexperia BZX84
    .. basis for this Design Idea is a circuit that uses three resistors and a microcontroller-I/O pin to work as input high impedance or ...
    Jun 11, 2024

42. Simple circuit converts 5V to -10 V
    Ken Yang
    Circuits Supply Analog Devices MAX889
    .. typical switched-capacitor charge pump requires no inductors, is easy to design, and can double a positive voltage or convert a positive voltage to an equivalent negative voltage. However, ...
    Jun 10, 2024

43. Solar constant lighting system uses PV-pushback-effect. Part 1 - System description
    Vijay Deshpande
    Circuits Supply Light Solar Texas Instruments LM311
    .. PV power is fully utilized to drive the SDL. Only balance power is drawn from the mains supply. Solar lighting system design Figure 3 presents a circuit diagram of the proposed solar lighting system. It consists of three PV panels ...
    Jun 6, 2024
44. High-current, low-voltage shunt regulator
    Robert Buono
    Circuits Supply Texas Instruments TLV431
    .. design idea describes a high-current (up to 8 A) shunt-regulator built around the TLV431 low-voltage, adjustable, ...
    May 16, 2024
45. Cooling FAN controller using an LM35 (No MCU)
    Hesam Moshiri
    Circuits Beginners STMicroelectronics LM358
    .. noises. C1 and C2 are bypass capacitors and are used to reduce noises. PCB layout Figure 2 shows the PCB layout of the design. It is a two layers PCB board and except for the connectors, all components are SMD. The board size is 3.8 cm ...
    May 15, 2024
46. 85V-260VAC to 5VDC-2.5A flyback switching power supply
    Hesam Moshiri
    Circuits Supply Dongke Semiconductor DK1203
    .. to perform all tests. I am confident that building this circuit enhances your knowledge regarding switching power supply design, except for using it for real applications. Specifications Input voltage: 85-265 VAC Output voltage: 5 VDC ...
    May 7, 2024
47. Drive a blue LED from a 3V battery
    Sergi Sánchez
    Circuits Supply Light ON Semiconductor NCP1729
    .. pose problems when available power-supply voltages don't meet or exceed the LED's 3 V forward-voltage drop. This Design Idea shows how to drive a blue LED from a 3 V battery or another power supply. The circuit in Figure 1 uses ...
    May 3, 2024
48. A groovy apparatus for calibrating miniature high sensitivity anemometers
    Stephen Woodward
    Circuits Measurement
    .. are an important category of environmental sensor. Articles about their design, data capture, and linearization have comprised topics featured in EDN Design Ideas, several quite recently. ...
    May 1, 2024
49. How to build an isolated digital AC dimmer using Arduino
    Hesam Moshiri
    Circuits Arduino Supply NXP BT138-800
    .. and your specific needs. Figure 7. The output waveform in 50% of the power (dim = 5000). References RC snubber circuit design for TRIACs Downloads Gerber files Materials on the topic Datasheet NXP BT138-800 Datasheet ON Semiconductor ...
    Apr 26, 2024
50. Efficient digitally regulated bipolar voltage rail booster
    Stephen Woodward
    Circuits Analogue Design Supply onsemi MC74AC132
    .. amplifier saturation in systems supplied with only a single logic-level power rail has been receiving a lot of activity and design creativity recently. Voltage inverters generating negative rails for keeping RRIO amplifier output circuitry ...
    Apr 26, 2024

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