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by Arieljo
Wed May 15, 2019 10:21 pm
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Re: Controlling temperature chamber using Peltier and PWM signal with external power source

Hey! Just to give an update to you guys. I just conducted a few tests using Peltier (the type that I am using I mentioned previously) to heat up my chamber and it is possible to reach 50 degrees C in my test chamber (volume is currently 10x10x10 cm). I placed heatsinks on both sides (hot and cold si...
by Arieljo
Sat May 04, 2019 3:16 pm
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Re: Controlling temperature chamber using Peltier and PWM signal with external power source

Hi Gavinmc42, Thanks for your suggestion, and the others too! I have briefly looked into using Nichrome wires, but we discussed that it would be a bit dangerous for us to implement, as this test chamber is going to be running for several months at a time, and the risk of it burning the test chamber ...
by Arieljo
Tue Apr 30, 2019 10:08 am
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Re: Controlling temperature chamber using Peltier and PWM signal with external power source

Thank you guys for all the reply! I'm still open to some ideas, so I will do a bit more research on the other ideas as well. 1st - your layout for that SSR device is incorrect. The 3 lug side is relay supply and control. The two lug side is normal open **switch**. Isn't that what I actually show in ...
by Arieljo
Mon Apr 29, 2019 6:25 pm
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Re: Controlling temperature chamber using Peltier and PWM signal with external power source

That doesn't sound good! :shock: I Googled the item and the alternative seems to be aliexpress, defaulting to Russian!. I also found a link to Aliexpress for the one with 4 channels https://www.aliexpress.com/store/product/4-Channel-SSR-Solid-State-Relay-High-low-Trigger-5A-3-32V-For-Uno-R3/1205023_...
by Arieljo
Mon Apr 29, 2019 4:40 pm
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Re: Controlling temperature chamber using Peltier and PWM signal with external power source

Hahaha, hopefully not :lol: :lol:

Thanks a lot for your help! I'll update you if I do have more questions :D
by Arieljo
Mon Apr 29, 2019 3:54 pm
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Re: Controlling temperature chamber using Peltier and PWM signal with external power source

Thanks for the quick reply pcmanbob, Sorry that the link doesn't work, weirdly it works for me :? . Anyway here's the link again https://www.grandado.com/products/collectie-1-st-nice-1-kanaals-ssr-solid-state-power-levert-hoge-lage-trigger-5a-12-v-relais-voor-arduino-uno-r3?gclid=CjwKCAjwwZrmBRA7Eiw...
by Arieljo
Mon Apr 29, 2019 12:47 pm
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Re: Controlling temperature chamber using Peltier and PWM signal with external power source

Hi pcmanbob, I found this DC/DC SSR which should work with 3-32 VDC INPUT. I do not really understand however what they mean by 40VDC/5A OUT, could you explain this to me? So, my plan is to use SSR to modulate the power by PWM signal from RPi. Considering that RPi GPIO pin only outputs 3V3, and this...
by Arieljo
Sat Apr 27, 2019 7:56 pm
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Re: Controlling temperature chamber using Peltier and PWM signal with external power source

Hi. You can't use a relay if you intend to use pwm control because a relay can't switch that fast. You will need to design and build a transistor based power controller, or you could used a motor driver if you can find one designed to operated at 12V at around 5A or better. Hi pcmanbob, Thanks for ...
by Arieljo
Sat Apr 27, 2019 10:22 am
Forum: Beginners
Topic: Controlling temperature chamber using Peltier and PWM signal with external power source
Replies: 26
Views: 1867

Controlling temperature chamber using Peltier and PWM signal with external power source

Hi all! I am planning on building a small chamber in which I want to heat up the temperature up to around 50 degrees Celcius. My idea is to use Peltier elements (with heat sink and possibly a fan?) connected to the external power source and powered fully until it reaches the desired temperature, the...

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