Content for PWM

PWM

Pulse width modulation (PWM), or pulse-duration modulation (PDM), is a method of reducing the average power delivered by an electrical signal, by effectively chopping it up into discrete parts. The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load. Along with MPPT maximum power point tracking, it is one of the primary methods of reducing the output of solar panels to that which can be utilized by a battery. PWM is particularly suited for running inertial loads such as motors, which are not as easily affected by this discrete switching, because they have inertia to react slow. The PWM switching frequency has to be high enough not to affect the load, which is to say that the resultant waveform perceived by the load must be as smooth as possible.

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Project  PWM Controller with R/E

PWM Controller with R/E

“Last month I spent quite a lot of time on expansion modules for use with the ESP-12E I2C Base Card. While the system worked exceptionally well as a prototyping and firmware testing platform ( as originally intended ), I immediately saw …

Project  Power-Saving PWM Solenoid Controller

Power-Saving PWM Solenoid Controller

“The project described here is a power-saving pulse-width modulator (PWM) controller for solenoids with an internal supply regulator. The board is based on the DRV110 IC which is a PWM current controller which is specifically designed for solenoid and relay …

Project  Powerful Fume Extractor on Articulating Arm

Powerful Fume Extractor on Articulating Arm

“I’ve had couple of soldering fume extractors before. First one didnt have enough power, and second one was just a fixed box without any articulating options, in many cases i could not find good position for it, it was …

Project  Decoding PWM Using an FPGA

Decoding PWM Using an FPGA

“Using a standard RC transmitter (HobbyKing HK-T6A) you will learn how to create and test Verilog to decode 6 channels of PWM. The transmitter outputs 6 PWM channels at 50Hz with each channel ranging from 1000us to 2000us. There …

Project  A digital quartz clock from scratch

A digital quartz clock from scratch

“After 20+ years of programming, I wanted to get some understanding of the electronics that make my career possible. I had built the basic individual logic gates with transistors on a breadboard, but to build anything meaningful I needed loads …

Project  Motor speed regulation without encoder

Motor speed regulation without encoder

“For controlling DC motor speed, often the PWM method is used. Using this method you can accelerate or decelerate the motor speed, but without any feedback, the speed of the motor strongly depends on the conditions, like the motor load …

Project  DC Motor Driver Using Power Mosfets

DC Motor Driver Using Power Mosfets

“DC motors are everywhere, from hobby applications to robotics and industrial areas. Therefore there is wide usage and request for suitable and powerful DC motor drivers. In this article, we will learn to build one. You can control it using …

Project  Robotic Arm Controlled by Arduino and PC

Robotic Arm Controlled by Arduino and PC

“Robotic arms are widely used in industry. Whether it is for assembly operations, welding or even one is used for docking on ISS (International Space Station), they help humans in work or they replace human totally. Arm that I’ve …

Project  Working RC Car Speedometer

Working RC Car Speedometer

“This is a short project that I created as part of a larger RC build of a Lightweight Land Rover. I decided that I fancied having a working speedometer in the dashboard, but I knew that a servo wouldn’t …

Project  Twelve PWM outputs from an ATtiny85

Twelve PWM outputs from an ATtiny85

“This project describes how to get 12 analogue PWM outputs from an ATtiny85, so you can drive 12 LEDs with individual control over each LED’s brightness Each LED can be set to a brightness between 0 (off) and 63 …