Circuits & Schematics: Design - 9

81. 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

82. 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

83. 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
84. 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
85. 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
86. 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
87. 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
88. 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
89. How to make a noise-free infrared obstacle detection module
    Hesam Moshiri
    Circuits Measurement Robots Vishay TSOP1738KA1
    .. PCB board mostly designed by SMD components which only take a small 3.2 cm × 1.8 cm board size. Figure 2. PCB board design of the IR obstacle detection circuit. As you can see on the PCB silkscreen, you must install an isolation ...
    Apr 17, 2024
90. Single phase mains cycle skipping controller sans harmonics
    Jayapal Ramalingam
    Circuits Supply Diodes NE555
    .. this controller skips a certain number of power cycles in between, to vary power to the heaters. In this typical design, 10 full cycles are taken as base. Timer U3 (555) through R2, R4, and C1 decides this by giving output pulses ...
    Apr 15, 2024

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