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  1. sam.moshiri

    Low Noise Adjustable Power Supply (30V-4A, CC-CV)

    A tip: As I mentioned in the video, in the last revision of the PCB board (which is available for you), the distance between electrolytic capacitors and the power resistors has been increased, however, if you still have concerns about this, you can use 470uF-50V capacitors instead of 1000uf-50V...
  2. sam.moshiri

    Low Noise Adjustable Power Supply (30V-4A, CC-CV)

    Power supplies are one of the most popular topics in electronics. There are two major types of regulated power supply: linear and switching. Both power supply types introduce some advantages and disadvantages, however, a linear power supply offers better line and load regulation figures and it...
  3. sam.moshiri

    A Full Digital FM receiver with Arduino and TEA5767 Module

    FM transmitters/receivers are among the top favorite circuits of any electronic enthusiast. In this article/video, I have introduced a complete digital FM receiver design that has equipped with an LCD screen and three push-buttons. It can search for the FM signals from 76MHz to 108MHz manually...
  4. sam.moshiri

    Component Tester (V-I Curve Tracer) Using The Oscilloscope XY Mode

    In this video, I've talked about the XY mode/feature of a Siglent SDS1104X-E oscilloscope and used it in a combination with a Siglent SDG1025 waveform generator to show how you can build an interesting component tester (V-I curve tracer) to test silicone diodes, Zener Diodes, Schottky diodes...
  5. sam.moshiri

    H Bridge PWM DC Motor Driver + PCB

    Thanks
  6. sam.moshiri

    H Bridge PWM DC Motor Driver + PCB

    An H-Bridge (Full-Bridge) driver is quite popular in driving loads such as brushed DC motors and it is widely used in robotics and industry. The main advantages of using an H-Bridge driver are: high efficiency, rotation direction change, and braking the motor. In this article/video, I have...
  7. sam.moshiri

    A Free and Open-Source Hand Sanitizer Dispenser

  8. sam.moshiri

    A Free and Open-Source Hand Sanitizer Dispenser

    Features   High stability and no sensitivity to the ambient light Laser-cut acrylic (plexiglass) enclosure Cost-effective Flow control capability of the hand-sanitizer/alcohol (efficiency) Through-hole components (easy to solder) Single-layer PCB board (easy to fabricate)...
  9. sam.moshiri

    Powerful Digital AC Dimmer Using STM32

    References Article: https://www.pcbway.com/blog/technology/4000W_Standalone_Digital_AC_Dimmer_Using_STM32.html [1]: TLP521 Datasheet: https://www.futurlec.com/Datasheet/LED/TLP521.pdf [2]: BTA26 Datasheet: https://www.mouser.com/datasheet/2/389/cd00002264-1795706.pdf [3]: AN437, ST...
  10. sam.moshiri

    Non Contact Hand Sanitizer Dispenser, Easy, Cheap, No Arduino!

    You're welcome. it doesn't have a controller. the intention was to find the easiest and cheapest solution. Please follow the video and provided resources.
  11. sam.moshiri

    Non Contact Hand Sanitizer Dispenser, Easy, Cheap, No Arduino!

    As we all know, the COVID-19 outbreak hit the world and changed our lifestyle. In this condition, Alcohol and hand sanitizers are vital fluids, however, they must be used properly. Touching alcohol containers or hand sanitizers with infected hands can spread the virus to the next person. In this...
  12. 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...
  13. 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...
  14. 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...
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. sam.moshiri

    BDLC direct drive 400 vdc

    if you change the mosfets of this circuit, it can handle the voltages up to 600V-DC
  20. sam.moshiri

    750W DC Motor Speed Controler 0-100% with Schematic and PCB Layout

    This is a nice circuit also (built with PCB)
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