Intro to Reading Schematics – A Basic Whirlpool Electric Dryer This article will schematically show where voltages appear in a Whirlpool Dryer circuit for different operating modes and failure states. This information can be useful to technicians that want to use voltage checks in addition to their other troubleshooting methods. Please note that this article […]
Important Note This blog is intended for experienced or supervised technicians. Always take appropriate safety precautions when dealing with live circuits. For informational purposes only. Never attempt to repair circuit boards in appliances or HVAC systems unless you are directly supervised by a professional engineer and doing so under approved ISO and UL processes. Alphabetical […]
Using voltage drops in addition to static resistance checks and dynamic current flow measurements can greatly improve your ability to effectively troubleshoot HVAC and Appliance issues. Don’t forget:“Diverting 10 min/day of social media time towards learning something new, is 5 hours of newfound monthly knowledge.” – SM To DONATE to the Tech Circuit – CLICK HEREAlphabetical […]
Introduction: PWM, or Pulse Width Modulation, aside from being the preferred method for controlling LED lighting, is a common way to control DC motors as compared to simple varied DC voltage. This is because with PWM, the motor still receives full power in the form of pulses, while at the same time, varied average power […]
Intro – What is a Relay Driver or Relay Control Circuit? A relay driver circuit acts as a buffer between the control board´s intelligence and the relatively high current drawn from the relay coil. A microcontroller typically will output a high or low logic level (3.3 or 5v for a high, and 0 volts for […]
Welcome to The Tech Circuit, where the focus is: “Electronics for Field Techs”. The Tech Circuit is all about electronic troubleshooting, theory, circuits, reading schematics, and every other electric or electronics topic as it applies to Appliances, HVAC, and other Field-Tech disciplines. The purpose is to help field technicians better understand the underlying electrical/electronic reasons […]