Pulse Width Modulators (PMW) electronic circuits

Pulse Width Modulators (PWM)
PWM Circuits: # - G H - O P - S T - Z

Last Updated: November 22, 2021 03:00 PM

Circuits Designed by Dave Johnson, P.E. :

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-778-8407

Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:

Tank Heater- a PWM power controller used to control the temperature in a tank for a tarantula __ Contact P. Townshend - EduTek Ltd

The +12 V power supply- Scroll down: The small current parts ( not the motor itself) could be powered from a +12 V voltage regulator. Then the input voltage must be larger than +15 V. The regulator survives a current of maximum 1 A with a heatsink. __ Contact Pico Technology

Timer with 555- Some useful circuits using the LM555 IC. Scroll to find the Timer with 555 circuit __ Designed by Jose Pino

Transistor pair lowers PWM IC's start-up current - 03/18/99 EDN Design Ideas: An auxiliary winding usually provide as power for the popular UC384X-based offline switch-mode power supplies (SMPSs). This winding feeds the main PWM controller. PDF contains multiple circuits, scroll to find this circuit. Design by Christophe Basso, Motorola Semiconductor, Toulouse, France

Two-channel audio Amplifier drives stepper Motor- 12/01/06 EDN Design Ideas: Pulse-width-modulated stereo power amplifier saves components Design by Phill Leyva and Bill Quach, Maxim Integrated Products, Sunnyvale, CA

Unused Port Adds a PWM/Analog Channel to a Microcontroller- 8-Oct-09 EDN Design Ideas: Take advantage of unused pins to generate a PWM signal and then filter it into analog Design by Vishwas Vaidya, Tata Motors Ltd, Pune, India

Use a Low-Cost PWM Ramp Generator In Switch-Mode Power Supplies- 04/08/10 EDN Design Ideas: Include this circuit in a switching-power-supply design. Design by Dwayne Reid, Edmonton, AB, Canada

Use a PWM fan controller in an EMI-susceptible- 02/16/06 EDN Design Ideas: Control it with either an external negative-temperature-coefficient thermistor or a PIC microcontroller and its SMBus serial-data bus Design by Dimitri Danyuk, Niles Audio Corp

Variable Frequency PWM- Schematic only, no circuits description. __ Designed by Tony van Roon VA3AVR

Video Design Idea: Leverage PWM output & add a low-cost DAC to your system- 07/19/07 EDN Design Ideas: Bonnie Baker demonstrates a simple way to add DAC functionality to a microcontroller-based system using only an op amp and two passive components Design by Bonnie Baker, senior applications engineer at Texas Instruments and regular EDN columnist

Voltage Inverter Employs PWM- 07/14/11 EDN Design Ideas: Use two diodes and two capacitors to generate a negative voltage. This design idea describes a circuit employing a small microcontroller-based sensor module with only three connections: 5V dc, an RS-232 transmit-data output, and ground. A dedicated sing Design by Jeff Wilson, STMicroelectronics, Schaumburg, IL

VU & PPM Audio Metering- A versatile and useful VU meter circuit, can also operate as a Peak Program Meter __ Designed by Rod Elliott ESP

Wireless RF PWM Dual Motor Controller- This is a very simple Wireless RF transmitter circuit that consists of the Holtek HT-12E encoder chip and AM 418MHZ-transmitter module ( WZ-X01, other similar device can be used). Using the hybrid RF xmit/receive modules make building the RF remote control a lot easy __ Contact info @ wzmicro.com

PWM Circuits: # - G H - O P - S T - Z