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  1. sam.moshiri

    How to Multiply the Output Current of LM317

    LM317 is one of the most popular adjustable regulator chips. The output voltage of the regulator can be adjusted from 1.25V to 35V. However, the chip can deliver currents up to 1.5A which is not enough for some power applications. In this article/video, I will discuss two methods of LM317...
  2. sam.moshiri

    Adjustable Double-Output Power Supply (Linear)

    Features: AC – DC Conversion Double output voltages (Positive – Ground – Negative) Adjustable positive and negative rails Just a Single-Output AC transformer Output noise (20MHz-BWL, no load): Around 1.12mVpp  Low noise and stable outputs (ideal to power Opamps) Output...
  3. sam.moshiri

    Programmable Police LED Flasher

    The STM8S001J3 is an 8-bit microcontroller that offers 8 Kbytes of Flash program memory, plus an integrated true data EEPROM. It is referred to as a low-density device in the STM8S microcontroller family. This MCU offered in a small SO8N package. In this article, we are going to build a...
  4. sam.moshiri

    97% Efficient DC to DC Buck Converter [3A, Adjustable]

    A tiny DC to DC buck converter board is useful for many applications, especially if it could deliver currents up to 3A (2A continuously without heatsink). In this article, we will learn to build a small, efficient, and cheap buck converter circuit. References Full Article...
  5. sam.moshiri

    Battery Capacity Measurement, Identify a Fake Battery, [Lithium-NiMH-NiCd]

    YouTube: https://youtu.be/AJvhhS8I3Ps Features: Identify a fake Lithium-Ion/Lithium-Polymer/NiCd/NiMH battery Adjustable constant current load (can also be modified by the user) Capable of measuring the capacity of almost any kind of battery (below 5V) Easy to solder, build, and use, even...
  6. sam.moshiri

    How to measure differential signals using an oscilloscope

      Differential signal measurement in practice To measure a differential signal, we have two options, one is using a differential probe and second is using a two channels oscilloscope. A differential probe is expensive but handles a better accuracy. Using two/four channels oscilloscope...
  7. sam.moshiri

    How to build an adjustable switching power supply using LM2576 [Buck Converter, CC-CV]

    Switching power supplies are known for high efficiency. An adjustable voltage/current supply is an interesting tool, which can be used in many applications such as a Lithium-ion/Lead-acid/NiCD-NiMH battery charger or a standalone power supply. In this article, we will learn to build a variable...
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