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  1. sam.moshiri

    Low Noise 45V-4A Dual Rail Power Supply Using Enhanced Capacitance Multiplier

    The core element of any electronic device is the power supply. Any instability or malfunction of the power supply causes the device to malfunction or demonstrate weird behavior. In some sensitive applications, we need a dual voltage-rail power supply to prepare a high current and low noise...
  2. sam.moshiri

    85V-260VAC to 5VDC-2.5A Flyback Switching Power Supply

    The key part of any electronic device is the power supply. Any instability or malfunction of the power supply part causes the device to stop working or demonstrate weird behavior. In this article/video, I introduced an AC-to-DC flyback Switching power supply that converts 85V-260VAC to...
  3. sam.moshiri

    Digital AC Energy Measurement Circuit: Voltage, Current, Power, PF, KWh

    Dealing with the 110V/220V AC mains voltage and measuring the AC load parameters are regarded as a challenge for electronic designers, both in circuit design and calculations. The situation becomes more complex when dealing with inductive loads because they cause a phase shift between voltage...
  4. sam.moshiri

    5V-1A DC to DC Buck Converter using MP9486

    DC-to-DC buck converters are utilized ubiquitously in electronic devices. Three major types of non-isolated DC-to-DC converters are introduced: Buck, Boost, and Buck-Boost. The most frequently employed type is the Buck converter. In this article/video, I introduce a compact buck converter board...
  5. sam.moshiri

    DIY 433MHz 4-Channels Wireless Switcher Circuit

    433MHz/315MHz remote controls are everywhere around us, used to control devices such as turning ON/OFF the lights or a TV, or in applications such as opening/closing parking or villa entrance, … etc. Such remotes are available in the market in various shapes and sizes; however, most are equipped...
  6. sam.moshiri

    220VAC to 8VDC 24W Flyback Switching Power Supply

    The most important part of any electronic device is the power supply section. Any instability or malfunction in this part causes the device to stop its operation or show weird behavior. In this article/video, I introduced an AC to DC Flyback Switching power supply that converts 220V-AC to 8V-DC...
  7. sam.moshiri

    DIY Laser Range Finder (1mm Accuracy)

    In this article/video, I used an RP2040 Zero board, a VL53L0X Laser time-of-flight ranging sensor, and a 2.4” TFT display to build a graphical laser rangefinder unit that can be used to monitor the distance, check the liquid level, etc. The board is also equipped with a relay and a buzzer that...
  8. sam.moshiri

    Adjustable Low EMI Switching Power Supply

    A power supply is an essential tool on every electronics bench. The TPS54202 is a highly efficient 2A synchronous buck converter with a wide 28V input voltage range and low EMI figures, making it suitable for various applications. These features make the TPS54202 an excellent choice for building...
  9. sam.moshiri

    Stereo Digital FM Transmitter Circuit

    In this project, I have introduced a compact stereo digital FM transmitter circuit that operates in the frequency range of 87MHz to 108MHz. The frequency can be adjusted using two tactile push-buttons, with a 0.1MHz step size. The heart of the circuit is an ATMega8 microcontroller, which...
  10. sam.moshiri

    👉 35V-5A Adjustable Switching Power Supply (DC to DC Buck Converter)

    A DC-to-DC converter is one of the most commonly used circuits in electronics, especially in power supply applications. There are three major types of DC-to-DC converters (non-isolated): Buck, Boost, and Buck-Boost. Sometimes a buck converter is also called a step-down converter and a boost...
  11. sam.moshiri

    30A AC Soft Starter (Inrush Current Limiter)

    Are you tired of dealing with the damaging effects of inrush currents on your industrial devices? Look no further than an AC inrush current limiter (soft starter). Inrush current, also known as surge current, is the large amount of current that flows into a load at start-up. This can cause...
  12. sam.moshiri

    DIY Wireless Home Automation (Control and Monitoring)

    Nowadays home automation is a trending topic among electronic enthusiasts and even the mass population. People are busy with their life challenges, so an electronic device should take care of the home instead! The majority of such devices need internet or Wi-Fi for connectivity or they don’t...
  13. sam.moshiri

    220V-AC to 12V-DC 18W Switching Power Supply

    Flyback is the most common circuit topology to build galvanically isolated AC to DC or DC to DC converters. Flyback circuit is cheap and relatively easy to manufacture, therefore nowadays the majority of home or industrial appliances are powered using AC to DC Flyback converters. In general, a...
  14. sam.moshiri

    A Standalone Full Bridge DC Motor Driver

    The Full-Bridge (H-Bridge) is the most popular driver circuit to control brushed DC motors. The main advantage of a full bridge driver is the ability to change the rotation direction of the motor, without manually reversing the supply wires. I’ve already published the Half-bridge and H-bridge...
  15. sam.moshiri

    40V-30A Adjustable Switching Power Supply

    https://www.youtube-nocookie.com/embed/xyNHRRr3blo?feature=oembed any question/comment is welcome
  16. sam.moshiri

    Graphical Temperature & Humidity Control Unit Using a Raspberry Pi Pico

    Raspberry Pi Pico is a cute piece of hardware. It is equipped with a powerful dual-core RP2040 microcontroller that offers 2M (up to 16M) Flash and 264K SRAM memories. Such specifications make it suitable for a variety of hobby and industrial applications. In this article/video, I used a Pico...
  17. sam.moshiri

    High Precision Digital AC Energy Meter Circuit

    Dealing with the 220V-AC mains voltage and measuring the AC loads' true power, voltage, and current parameters are always considered a big challenge for electronic designers, both in circuit design and calculations. The situation gets more complex when we deal with the inductive loads because...
  18. sam.moshiri

    36V-3A Adjustable Efficient DC to DC Step-Down Converter

    A DC-to-DC converter is one of the most commonly used circuit topologies in electronics, especially in power supply applications. There are three major types of DC-to-DC converters (non-isolated): Buck, Boost, and Buck-Boost. Sometimes a buck converter is also called a step-down converter and a...
  19. sam.moshiri

    3-Wires/4-Wires FAN Control and Over Temperature Protection using LM35 and ATTiny13

    Proper thermal dissipation is an essential rule for nowadays electronics. The best operating temperature for the electronic components is 25 degrees (standard room temperature). Thermal dissipation in some commercial devices is not done properly which affects the lifetime and performance of the...
  20. sam.moshiri

    3-Wires/4-Wires FAN Control and Over Temperature Protection using LM35 and ATTiny13

    Proper thermal dissipation is an essential rule for nowadays electronics. The best operating temperature for the electronic components is 25 degrees (standard room temperature). Thermal dissipation in some commercial devices is not done properly which affects the lifetime and performance of the...
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