Hello, I'm about to post a question to sStack eExchange. Hello, I'm about to post a question to Stack Exchange.

Hello, I'm about to post a question to sStack eExchange. Hello, I'm about to post a question to Stack Exchange.

I deleted the equations and most of the formatting to make it more readable. I deleted the equations and most of the formatting to make it more readable.

I'm trying to design a growing box that will keep a stable temperature for the germination of seeds. I'm trying to design a growing box that will keep a stable temperature for the germination of seeds.

I'm trying to design a growing box that will keepmaintain a stable temperature for germination of seeds. I'm trying to design a growing box that will maintain a stable temperature for germination of seeds.

“Germination of seeds” is not technically wrong but I would say “seed germination” Another way to say this: “I’m trying to design a growing box that will keep the temperature stable (enough) for seed germination.”

I'm not sure what the isonsulation of the box will be, but I'm considering either a plastic box, or an old refrigerator. I'm not sure what the insulation of the box will be, but I'm considering either a plastic box, or an old refrigerator.

I'm not sure what the isonsulation of the box will be, but I'm considering either a plastic box, or an old refrigerator. I'm not sure what the insulation of the box will be, but I'm considering either a plastic box, or an old refrigerator.

The target temperature is 30°C (86°F). The target temperature is 30°C (86°F).

The target temperature is 30°C (86°F). The target temperature is 30°C (86°F).

I need to choose the right heating element, and determine what power supply to use for that heating element. I need to choose the right heating element and determine what power supply to use for that heating element.

I've already done some calculations forto reaching this goal. I've already done some calculations to reaching this goal.

I've already done some calculations for reaching this goal. I've already done some calculations for reaching this goal.

I can’t put my finger on what it is, but this sentence reads a little strange to me. You get your point across though so I think it is fine. I might instead say “I’ve already done some calculations to work towards this goal.”

First of all, I need to determine how much power is required to heat up the box to the target temperature. First of all, I need to determine how much power is required to heat up the box to the target temperature.

First of all, I need to determine how much power is required to heat up the box to the target temperature. First of all, I need to determine how much power is required to heat up the box to the target temperature.

Let's assume that the house temperature is 20°C and I want to heat it up to 30°C in 30 minutes. Let's assume that the temperature is 20°C and I want to heat it up to 30°C in 30 minutes.

Let's assume that the house temperature is 20°C and I want to heat it up to 30°C in 30 minutes. Let's assume that the house temperature is 20°C and I want to heat it up to 30°C in 30 minutes.

You can also say “ambient temperature” to refer to the surroundings/environment

I used an equation from https://www.engineeringtoolbox.com/heat-up-energy-d_1055.html forto determininge the energy required to heat up a substance. I used an equation from https://www.engineeringtoolbox.com/heat-up-energy-d_1055.html to determine the energy required to heat up a substance.

So the required power to heat up the box to the target temperature in 30 minutes is 6.7 watts. So the required power to heat up the box to the target temperature in 30 minutes is 6.7 watts.

So the required power to heat up the box to the target temperature in 30 minutes is 6.7 watts. So the required power to heat up the box to the target temperature in 30 minutes is 6.7 watts.

For a more formal piece of writing, I would use a transition word like “Therefore” rather than “So”: “Therefore, the required power...”

It isThis si the first time Ithat I have calculated something like this. This si the first time that I have calculated something like this.

It is the first time I have calculated something like this. It is the first time I have calculated something like this.

You could also say “This is my first time doing a calculation like this.”

TPlease tell me if I made a mistake. Please tell me if I made a mistake.

Your version is technically fine, but since you are posting on a forum I added the “please” for etiquette and to make the sentence a request rather than a command.

Does this mean that I need a heating element that consuminges 6.7 watts? Does this mean that I need a heating element that consumes 6.7 watts?

Am I on the right track, or is it complete nonsense what I wrote abovwhat I wrote above complete nonsense? Am I on the right track, or is it what I wrote above complete nonsense?

Am I on the right track, or is it complete nonsense what I wrote abovwhat I wrote above complete nonsense? Am I on the right track, or is what I wrote above complete nonsense?

What would you recommend me as a power supply for this task? What would you recommend as a power supply for this task?

From what I know, the lessower the resistance, the greater the power. From what I know, the lower the resistance, the greater the power.

But is it okay to use that smalla resistance that low in a circuit? But is it okay to use a resistance that low in a circuit?

If you have any other recommendation, feel free to share ithem. If you have any other recommendation, feel free to share them.