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Controlling heat of the unit could be fundamentally done by employing triac or SCR based chopper designs or through thermostat based cut off circuits.
Semiconductors like triacs specifically become suitable when a continuously variable heat control is required such as for resistive heaters.
However the same can be also applied by using thermostats with sensors like thermistors or thermocouples, designed to cut off the AC mains at a desired preset threshold, and switch it ON again when the temperature returns back to normal.
This category brings you a compilation of mains operated heater control circuits. The AC input could be from your home mains outlet at 220V or at 120V depending on the particular country specification, or in an industrial complex from 3 phase 440V lines.
The designs presented below show how to control temperature of a given gadget or appliance using the explained circuit ideas either automatically or through manual switching.
In this post we learn how to scavenge discarded microwave oven parts for making a useful soldering iron heat controller circuit which can then be used for maintaining controlled heat over a connected soldering iron tip ensuring safe soldering operations, that may be quite crucial and handy if you are working with SMD parts. By … Read moreUsing Microwave Oven Parts to build a Soldering Iron Heat Controller
The post explains how to make small homemade induction heater circuit for laboratories and shops for carrying out small scale heating jobs such as melting ornaments, or boiling small quantity of liquids using electricity or battery The idea was requested by Mr. Suni and Mr. naeem Circuit Objectives and Requirements Our challenge is to make … Read moreInduction Heater for Labs and Shops
The article explains a step by step tutorial regarding designing your own homemade basic induction heater circuit, which can be also used as an induction cooktop. Basic Induction Heater Concept You might have come across many DIY induction heater circuits online but nobody seem to have addressed the crucial secret behind implementing a perfect and … Read moreHow to Design an Induction Heater Circuit
The idea of acquiring free energy from induction cookwares using an external bifilar coil was suggested by one of the keen enthusiasts and a regular visitor of this blog. Let’s learn more regarding the details of this interesting free energy device, as explained by the author himself. WARNING: THIS CONCEPT ATTEMPTS TO VIOLATE THE “LAW … Read moreFree Energy from Induction Cooktop
In this article we are going to construct a couple of simple Arduino based automatic temperature controlled dc fan circuits which will switch ON a fan or any other gadgets connected to it, when the ambient temperature reaches a pre-determined threshold level. We are going to utilize DHT11 sensor and arduino for this project. By: … Read more2 Automatic Temperature Controlled DC Fan Circuits
A programmable sequential timer along with a triac dimmer is configured for making this kiln temperature controller circuit, further details are explained in the following article. The idea was requested by Mr. Joe. 220V Kiln Controller with Timer I’m hoping you have some time to have a crack at a design I’m after. I’ve been … Read moreKiln Temperature Controller Circuit