• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

Circuits for Beginners | Basic Circuits | LED Driver | Hobby Circuits | Transistor Circuits

New-Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright | Videos

You are here: Home / 4060 IC Circuits / Kiln Temperature Controller Circuit

Kiln Temperature Controller Circuit

Last Updated on July 6, 2019 by Swagatam 3 Comments

ask questions through comments

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

  1. I'm hoping you have some time to have a crack at a design I'm after.
  2. I've been trying to find a design for a kiln controller on the web to no avail.
  3. The main parameters would be a preheat cycle approx 1 hour, followed by a 3 step ramp up to an end point of 560c.
  4. Having temp displayed via an LCD and possibly a timer set through this would be great.
  5. My kiln element is currently 240v AC and drawing 17 amps.

The Design

The proposed kiln oven temperature controller circuit with timer can be built using the following explained cascaded sequential timers whose timings can be independently adjusted.

Referring to the above circuit design, the design is basically built around three identical IC 4060 timer stages and a standard light dimmer circuit enhanced with a high power triac for supporting the specified 17 amp kiln heater coil.

The entire kiln timer controller circuit can eb understood from the followng points:

The extreme left side IC 4060 timer circuit has all the component details which needs to be exactly replicated for the subsequent cascaded stages as these stages are identical with their componets and working specs. These stages are rigged to produce sequential timing outputs and activating the relevant relays in response to the set individual timings.

When the indicated power switch is pressed, the SCR at extreme left latches and grounds the pin#12 of the IC enabling it to initiate the counting process.

During this period its pin#3 is held at logic low ensuring that the attached BC547 and the relay stay switched OFF.

Also since the pin#12 of the second and the third IC are rendered at the positive supply level, these ICs stay disabled while the first IC is activated and counting.

As soon as the set time delay elapses, pin#3 of the left most IC goes high, activating the concerned relay and also latching the pin#3 high situation via the 1N4148 diode connected with pin#11.

The above activation causes the pin#12 of the second C to get grounded via the BC547 collector, which in turn enables the second IC 4060 now begins counting, and the process is repeated identically activating the second relay after the set elapsed delay.

The third IC and the relay follows the same pattern sequentially.

The relay contacts can be seen connected with 3 series 100k resistors which become the part of the triac dimmer circuit, and the total value of these resistors determine the conduction level of the triac which in turn decide the heat level of the attached heater coil.

Initially while the first IC 4060 is counting, all the three resistor become involved in series allowing the lower preheat process to begin.

When the first relay activates it shorts one of the 100K resistors causing higher conduction through the triac and higher current to flow through the heater, raising the temperature of the kiln proportionately to a higher level, this is repeated by the second relay also, elevating the kiln temperature a little more, ....until the final relay clicks causing the kiln temperature to soar to the required 560 degrees.

If you have any more queries regarding the discussed kiln temperature timer controller circuit, please feel free to jot them in through comments.

Calculating the Timing Components

The following formula can be used for assessing the various time periods for the individual ICs:

f(osc) = 1 / 2.3 x Rt x Ct

2.3 is a constant term which does not need any change.

In order to ensure an accurate output delays, the following condition must be maintained across the selected components:

Rt << R2 and R2 x C2 << Rt x Ct.

get free help for circuit diagrams

You'll also like:

  • 1.  Induction Heater for Labs and Shops
  • 2.  Temperature Controller Circuit for Reptile Racks
  • 3.  Temperature Controlled Relay Switch Circuit
  • 4.  Timer Circuits with Auto Pause and Memory During Power Failures
  • 5.  100 °C to 1000 °C Thermocouple Temperature Meter Circuit
  • 6.  Simple Timer Circuit Using IC 4060

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Subscribe for the Latest Posts


 

Reader Interactions

Comments

    Have Questions? Please post your comments below for quick replies! Comments should be related to the above artcile Cancel reply

    Your email address will not be published. Required fields are marked *

  1. Gabriel Fusaru says

    February 9, 2021 at 10:07 am

    Why not using a basic controller to generate the sequential timing? A “bluepill” board (STM32F103) is less than 5$ and can be programmed easily.

    Reply
  2. Ken says

    August 4, 2019 at 12:17 am

    I have made a couple of oven/kiln temperature controllers using the Arduino UNO for the temperature regulator, thermocouple and amplifier for temperature sensing and a triac switch as the final power control element. The design is really quite simple and they worked quite nicely. One way to make life difficult for yourself on temperature controllers is to attempt to use voltage control which is very non linear with respect to power and so causes problems with the regulator. A far better approach is to use pulse width modulation with a period of, say, 10 seconds (not the Arduino pwm).
    If this is of any interest to you I could go into it further.

    Reply
    • Swagatam says

      August 4, 2019 at 10:37 am

      The circuit shown above uses a triac chopper concept, which is also a form of PWM applied to an AC. A triac chopper based heat control for a resistive load is probably the most efficient form of load control, in terms of cost as well as power saving.

      As suggested by you a 10 sec variable pulse can be also used as effectively, no problems with that! But with a triac chopper the switching will be constant and smooth.

      Reply

Primary Sidebar



Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (52)
  • 4060 IC Circuits (25)
  • 555 IC Circuits (98)
  • 741 IC Circuits (19)
  • Amplifiers (59)
  • Arduino Engineering Projects (83)
  • Audio Projects (94)
  • Battery Chargers (83)
  • Car and Motorcycle (94)
  • Datasheets (46)
  • Decorative Lighting (Diwali, Christmas) (32)
  • DIY LED Projects (89)
  • Electronic Components (97)
  • Electronic Devices and Circuit Theory (35)
  • Electronics Tutorial (110)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Fun Projects (12)
  • GSM Projects (9)
  • Health Related (19)
  • Heater Controllers (28)
  • Home Electrical Circuits (100)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (64)
  • Mini Projects (156)
  • Motor Controller (66)
  • MPPT (7)
  • Oscillator Circuits (24)
  • PIR (Passive Infrared) (8)
  • Power Electronics (33)
  • Power Supply Circuits (75)
  • Radio Circuits (9)
  • Remote Control (47)
  • Security and Alarm (61)
  • Sensors and Detectors (118)
  • SG3525 IC (5)
  • Simple Circuits (74)
  • SMPS (29)
  • Solar Controllers (60)
  • Timer and Delay Relay (53)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (40)
  • Ultrasonic Projects (14)
  • Water Level Controller (45)


Circuit Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator


You can also Chat with me here:

Facebook
Twitter
YouTube
Instagram
My Facebook-Page
Quora



© 2022 · Swagatam Innovations

We use cookies on our website to give you the best experience.
Cookie settingsAccept All
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Please visit the Privacy Policy Page for more info.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Non-necessary
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
SAVE & ACCEPT