Electrical Circuits in my Greenhouse


Electric heating has many advantages compared to the water.Firstly, the electric heaters can be controlled automatically.Secondly, the installation of such a system is much easier than setting up the water circuit.And, thirdly, modern devices are economical, so space heating in the winter will not be too expensive.Next, we provide the most efficient heating greenhouses electricity scheme.

First of all, it should be noted that several variants of the heaters can be used for the electric heating of the garden buildings.The simplest solution would be a system of floor heating installation of the heating cable.An alternative solution would be to connect infrared heaters that are installed on the ceiling.And the last, the most time-consuming option - connection of the electric boiler, which will heat the coolant water for convectors or underfloor heating.Let us consider in detail the projects of each of these systems.

heating cable Dehumidifiers The electric ...
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A free series of textbooks on the subjects of electricity and electronics. A must for every engineering student and a good reference and refresher for experienced engineers.

Thanks to Tony R. Kuphaldt for the free training tutorials.

Volume I - DC Electric Circuits (pdf ~6MB)
Chapter 2: OHM'S LAW
Chapter 13: CAPACITORS
Chapter 15: INDUCTORS
Chapter 16: RC AND L/R TIME...

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The cases presented to the hotline greenhouse controllers, using frequency ratio control, energy saving, the advantages of small harmonic interference .

Circuit works

The greenhouse to the hotline from the power circuit and controller circuit heating control circuit , as shown in Figure.

Power circuit from the fuse FU, power transformer T, rectifier diode VDl-VD3, resistors Rl, three-terminal voltage regulator integrated circuit ICl and filter capacitor Cl form .

Heating control circuit consists of resistors R2-R5, capacitor C2, voltage regulator diode VS, Schmitt trigger NAND gate integrated circuit IC2 (DI-D3), JK flip-flop integrated circuit IC3 (Al, A2, counting / pulse distribution IC IC4, selector switches S, transistor V, thyristor composed of VT and to the hotline EH . AC 220V voltage by T Buck , VDl-VD3 rectified , all the way through Rl limit , ICl regulator to +6 V, as IC2-1C4 of the working power ; another pass through R2 -limiting ,...

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Which circuit controls this outlet?

A basic knowledge of house wiring techniques is needed, and circuits must be analyzed and tested. A separate drawing of the service panel, showing each fuse or circuit breaker, is needed for labeling each circuit.

Draw a floor plan of each room in the house that has electrical connections. Include outside porches, storage buildings or garages. Use symbols to identify switches, outlets and lights.

Find the main shutoff switch and electrical panel. Locate subpanels, if there are any, and draw a diagram that shows each circuit breaker or fuse in the panel. Mark an identification number or letter next to each circuit breaker or fuse.

Turn on all the lights in the house, including lamps that are plugged into wall outlets. Turn off one circuit by switching off the circuit breaker or unscrewing the fuse. All of the lights that go off are on that circuit. Mark that circuit's identification number or letter next to the light...

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Before circuit breakers, mankind had fuses. They are single-use current interrupter with a component that melts if the current traveling through a circuit grows to excessive levels; thus, the fuse is used up and the electrical circuit remains protected and intact.

So, what do fuses do exactly? Well, fuses are usually just thin pieces of wire enclosed in heat-resistant glass or some other type of material. These fuses are plugged into the circuit and act as a conduit for the electricity flowing through it. You can think of fuses as a bridge that allows current to travel across the circuit. The wire (or other component) in the fuse is designed to tolerate a certain level of current. When the current flowing through the circuit experiences a surge, the wire melts or disintegrates, creating a gap that the current cannot cross. Going back to the bridge metaphor, the bridge has a weight limit. A surge of current is like a really heavy truck that caused the bridge to collapse....

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This project actually started because I had just bought a new PC leaving my old one doing nothing but sitting in a corner. It was still a perfectly good PC running windows XP at a reasonable speed for all but the most demanding of applications and I was determined to use it for something. The something was based on an idea I had some time ago to automate my greenhouse. I got this idea after fitting electric windows which opened and closed at the flick of a switch rather than boring old window stays. It created an opportunity for automating the ventilation function.
As I saw it there were four areas I had to work on to make this project happen.
1. Decide exactly what I meant by automating the greenhouse. i.e. the specifications
2. Choose / design the sensors and actuators
3. Decide how to connect all these to the PC
4. Write the software
Seems simple when you say it quickly ! Anyway, setting about this in pseudo...

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The post discusses a simple electronic temperature regulator circuit which could be specifically used for regulating greenhouse temperatures. The idea ws requested by Mr. Leo.

The Request

I am looking for a guide to build a basic temp regulator circuit. I have
a solar charger bought from lidl,(SLS 2200 A1) which has outputs for 5,
7.5 & 9.5v DC 0.5A. it will be used for soil heating in a

My idea is to use black drip irrigation pipe as a 'solar
panel' to heat the water and with a low volume pump regulate the temp
under a propagation tray. Any advise is greatly appreciated.

I have
seen similar setups for egg incubators , fridge temp controls, etc. but
need it at an allotment, so only power source is small panel. also if
possible would it be possible to increase capacity of internal battery
and have a heating element added. Thank once again. Leo

The Design

Before getting into the main...

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Green house intelligent control system is designed to protect the plants from more cool and hot weather and additional control system is included to save power by making fans and lights automatically turn on and off with the help of intelligent control system. In this project, the intelligent control system is developed using microcontroller and sensors. Green house system has a very important use now a days in the agriculture field.Some plants need the specific amount of water for their proper growth and more productivity, therefore farmer should provide them the proper quantity of water. But it’s difficult for the farmer to get a estimation for quantity of moisture in soil. But in this project moisture sensor is used to to provide this facility with a intelligent control system.

Main functionality of project

Block diagram below shows the main functionality of green house intelligent control system. Four sensors are used to measure different parameters of green...

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Edgefx offers variety of Electrical projects which are all 100% output guaranteed for engineering students of final year. Core electrical and embedded electrical based projects in DC & AC MACHINES, TRANSMISSION LINES, High Voltage, covering PF correction, cable fault detectors, home automation, wireless power transfer, PID, PLC, Islanding of grid, energy management etc. in single phase and 3 phase applicable to industry and domestic areas. Many IEEE origin papers solved to maximum extent that a student can understand is supported by detailed audio visual explanations.

Following are some examples of Electrical Projects for engineering students provided by Edgefx Technologies:

APFC to MINIMIZE PENALTY IN INDUSTRIAL POWER CONSUMPTION: Automatic Power Factor Compensation (APFC) is achieved by engaging number of shunt capacitor in parallel to inductive loads. The time lag between zero voltage and zero current is fed to a microcontroller that drives relays from its output...

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Basically, the principle involved is the conservation of energy:

Energy In (Sunlight) = Energy Out (Infrared Radiation to Space) + Sunlight Reflected to Space

In the picture below, notice how there are various processes on earth involving the movement of solar energy, but all the energy enters and exits via space, and because of earth’s rotation about the sun there is an equilibrium that balances on an annual basis.

The Greenhouse Effect works as follows:

The rate of energy (as heat) emitted from the earth’s surface to space is governed by the earth’s surface temperature. The greenhouse effect imposes a resistance between the earth’s surface and space. As resistance to heat flow increases, the earth’s surface temperature must increase to maintain constant flow.

Consider this electrical analog:

The object is to maintain constant current (measured by amp meter A). As the resistance increases,...

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LED constant current driver

These days there are tons of commercial LED grow light fixtures available for purchase, ranging from tens to thousands of dollars. The ones that realistically mimic the light output of professional grow lights typically use 10s to 100s of the 1W (1 watt) or 3W LED components. With a per-piece cost of $1-$5, these fixtures often cost hundreds of dollars.

Given the large fixed cost of the components themselves, I decided to try and save on the labor costs and build my own high-power LED lighting system. I based my design heavily off the instructions on Dan Goldwater's LED power supply tutorial. Specifically, I started from the constant-current design in Step 6.

To save on shipping, I mostly used components I could get locally:

IRF520N HEXFET power transistor (in place of Fairchild FQP50N06L) 2N3904 NPN transistor (in place of Fairchild 2N5088BU) 100 kOhm resistor 2x 0.47 ohm (up to 5W) and 2x 1.0 ohm (up to 10W) power...
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How To Heat A Greenhouse Without Electricity

There are two main concepts concerning heating a greenhouse without electricity.

The first is by collecting the sun’s warmth as sunlight hits upon a dense material called thermal mass, such as rock and water. Thermal mass will absorb a lot of heat throughout the day and release that heat when temperatures drop at night. Utilizing thermal mass in a greenhouse is easy since it already receives much sunlight.

The second concept is with composting, since compost piles produce heat as the microorganisms within them break down the organic materials into compost.


small stones or gravel

white paint

black paint

paint brushes

cinder blocks

water container(s)

ceramic pots

wire mesh

organic materials (leaves, twigs, etc.)

Step 1:

Put down a layer of small stones or gravel in your greenhouse. This creates a layer of thermal...

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An electrical circuit is a device that uses electricity to perform a task, such as run a vacuum or power a lamp. The circuit is a closed loop formed by a power source, wires, a fuse, a load, and a switch. Electricity flows through the circuit and is delivered to the object it is powering, such as the vacuum motor or lightbulb, after which the electricity is sent back to the original source; this return of electricity enables the circuit to keep the electricity current flowing. Three types of electrical circuits exist: the series circuit, the parallel circuit, and the series-parallel circuit; depending on the circuit type, it may be possible for electricity to continue flowing should a circuit stop working. Two concepts, Ohm's Law and source voltage, can affect the amount of electricity flowing through a circuit, and therefore, how well an electrical circuit functions.

How it Works

Most devices that run on electricity contain an electrical circuit; when connected to a...

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We are extremely pleased with our decision to invest in a solar energy system, and thrilled with our decision to partner with Frank from Green House Solar. From

the outset, Frank was extremely patient and thorough answering our many questions. Knowing very little about what can be an overwhelming process, Frank took his time to go through our options to ensure we were comfortable with our decision.

We spoke to several reputable companies throughout the state. Several pushed leasing, which was not the right path for us. Ultimately we narrowed our decision down to two. On the one hand was a true project manager/salesman that was fantastic in his responsiveness, competitively priced, and promised to stay on top of things as the install process unfolded. On the other hand was Frank, who was largely a one-man show, less flashy with sales materials, but far more genuine is his commitment to the process from start to finish and in his belief in the solar energy benefits, both...

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Lessons In Electric Circuits

A free series of textbooks on the subjects of electricity and electronics

Copyright (C) 2000-2017, Tony R. Kuphaldt

These books and all related files are published under the terms and conditions of the Design Science License. These terms and conditions allow for free copying, distribution, and/or modification of this document by the general public.

A copy of the Design Science License is included at the end of each book volume. For more information about the License, visit https://www.gnu.org/licenses/dsl.html

As an open and collaboratively developed text, this book is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Design Science License for more details.

Access individual volumes, I through VI:

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600 Watt Grow Light by Digital Greenhouse Overview

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Choice of Bulb - Choose HPS or MH, and take advantage of big savings when you add a second bulb!

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Suggested coverage: 4' x 4' - 7' x 7' area

600 Watt Grow Light Base system includes:

• 600w Digital Greenhouse Ballast
• 10' Grounded Power Cord
• LightWing Reflector
• HTGSupply 600 watt HPS High Output Horticultural bulb
• 15' Mogul Socket / Cord Set

This 600 Watt Grow Light Includes A Premium Digital Greenhouse Ballast

Lighter, smaller, and more versatile than standard...

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Shown above is a very simple Dark Detecting circuit. It's quite similar to the one found in every day solar garden lights. It uses the solar cell and a PNP Transistor as it's dark detecting sensor.

(After completing this project I wished I would have gone with a Joule Thief setup. You can find many guides on Instructables for making a simple Joule Thief, and even a dark detecting Joule Thief. It's probably in your best interest to go that route if you can.)

I'm using a simple perf board to hold all the parts together. You could easily freehand this, but I had some boards handy and decided to use them.

Before you get going, try this out on a Breadboard. Seriously. Even though I've made this circuit 100 times, I STILL managed to put the transistor in backwards! (Which, not to everyone reading this, the TRANSISTOR IS IN BACKWARD in all of my photos until the end.)

First, place your parts on the perf board. Give yourself plenty of room. I started with the...

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