Top 3 GreatScott! videos of 2019 Random/Unscripted Q&A #6
video description
We have load shedding/blackouts on and off here in South Africa and with africa being quite hot, if the power goes out, I have no fan and can't sleep. A few guys where I work have the same issue. Getting maybe 3 hours of sleep and then having to get up at 5am to go to work gets old pretty quick. Also, the fan helps keep mosquitoes away which in certain parts of the world can help prevent malaria.
People in other parts of the world will have a similar requirement. The video will be worth while. Companies like Makita make the DCF300Z fan and although it looks like what I need and seems to have the battery life and airflow one would want, it's VERY expensive. You have to buy the fan, battery, and charger all separately. Also, if it's battery powered, it's portable.
I kinda know what is needed to build something like this, but I have little knowledge on what would be the correct parts and how they all fit together.
Motor: Living in a 3rd world country, a salvaged 12V DC motor would be the easiest and cheapest option to get, but how powerful should it be if I want decent airflow? 10w? 15w? 30w?
Battery pack: A lithium battery pack does not add up to 12v if you use lithium cells like you find in laptop battery packs. Would the motor controller be able to bring the voltage down from something like 14. 4v to 12v or would we need something to step it down as well?
How can one make the battery pack expandable so you could possibly add more capacity later?
Charging: Would be great if it can be plugged in and run off power from the wall, but then automatically switch to battery if the power goes out. Then switch back to wall power (And charge battery) when power comes back on. much like a laptop.
Motor Controller: Would something with 2-3 fixed speeds be better than something with variable knob?
It seems no one really makes something like this. All the battery fans I've been able to find online require an external charger or you have to remove the battery to plug it into the wall. None of the fans I've found seems to give you the best of both worlds like a laptop's power setup does.
Something similar to the Makita DCF300Z would be perfect and I do believe the video would be worth while. It's completely understandable if you don't feel such a build is worth while, no harm in asking: )
Date: 2020-09-05
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Comments and reviews: 9
Zagga's
Hi great scott, how are you? you talked a little about almost having your moped stolen which I know can be frustrating, motorbike theft is a HUGE problem here in the UK & I have been thinking of ways to make a motorcycle useless without the owners input/consent using electronics but it seems almost all security systems can be bypassed if enough time is spent figuring out how it works, I do have electronics knowledge but not as much as you have & since I can't come up with any useable ideas at the moment I thought maybe it could be a cool future project for you? I know there is a huge flaw protecting a motorbike this way as it can still be taken away & dismantled for parts & also having the project & information here on YouTube would give thieves the opportunity to learn & disable such a device so this is a difficult one but part of the problem here in the UK is alot of the stolen motorcycles are being used to commit other crimes such as robbery & motorcycle hijacking, because the police can't catch them. being able to render a motorbike useless with a difficult to get around system could stop alot of violent crime.
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Hi great scott, how are you? you talked a little about almost having your moped stolen which I know can be frustrating, motorbike theft is a HUGE problem here in the UK & I have been thinking of ways to make a motorcycle useless without the owners input/consent using electronics but it seems almost all security systems can be bypassed if enough time is spent figuring out how it works, I do have electronics knowledge but not as much as you have & since I can't come up with any useable ideas at the moment I thought maybe it could be a cool future project for you? I know there is a huge flaw protecting a motorbike this way as it can still be taken away & dismantled for parts & also having the project & information here on YouTube would give thieves the opportunity to learn & disable such a device so this is a difficult one but part of the problem here in the UK is alot of the stolen motorcycles are being used to commit other crimes such as robbery & motorcycle hijacking, because the police can't catch them. being able to render a motorbike useless with a difficult to get around system could stop alot of violent crime.
reply
David
Hey GreatScott could u please help me an provide some good study material for beginners? I have a little home project where I want to connect a 12V LED stripe as a ceiling lamp. I would like to know how to change the electricity so that everything will be save and sound.
Also could you tell us where do u usually get ur stuff (like wires and PCPs etc. Cheers for answering!
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Hey GreatScott could u please help me an provide some good study material for beginners? I have a little home project where I want to connect a 12V LED stripe as a ceiling lamp. I would like to know how to change the electricity so that everything will be save and sound.
Also could you tell us where do u usually get ur stuff (like wires and PCPs etc. Cheers for answering!
reply
Daniel
Idea: low-cost tiny (as possible) battery-powered GPS tracker - can be used in a million ways to protect ur stuff- also if you keep getting your packages stolen from your door/home - setup a fake delivery box with one hidden inside (stick inside another electronic for max stealth) and see where it ends up- give the end location to local police
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Idea: low-cost tiny (as possible) battery-powered GPS tracker - can be used in a million ways to protect ur stuff- also if you keep getting your packages stolen from your door/home - setup a fake delivery box with one hidden inside (stick inside another electronic for max stealth) and see where it ends up- give the end location to local police
reply
Pablo
hi i want to build a led luminaire for planted aquarium, but i dont know how to do it, i know that plants use more of the blue and red spectrum for photosynthesis, being within the wavelength of 470-700 nm being that green and yellow are hardly used, so the question is how to make it efficient and beautiful, help me. greetings from Brazil.
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hi i want to build a led luminaire for planted aquarium, but i dont know how to do it, i know that plants use more of the blue and red spectrum for photosynthesis, being within the wavelength of 470-700 nm being that green and yellow are hardly used, so the question is how to make it efficient and beautiful, help me. greetings from Brazil.
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Tausif
I know you are working on the brushless drone project. Could you make a Brushed drone related video? I think the brushed drone will satisfy a lot of your viewers including me who are waiting for good quadcopter content from the one and only Greatscott! :D
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I know you are working on the brushless drone project. Could you make a Brushed drone related video? I think the brushed drone will satisfy a lot of your viewers including me who are waiting for good quadcopter content from the one and only Greatscott! :D
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Jererca
Hey Scott, review that thing with soldering irons using a transformer, If that its true, build one using common materials(try to not make any complicated circuit)
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Hey Scott, review that thing with soldering irons using a transformer, If that its true, build one using common materials(try to not make any complicated circuit)
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cwbh10
I think the more limiting factor for the DIY oscilloscope will be the ADC's bandwidth and at what point it becomes non-linear in its readings
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I think the more limiting factor for the DIY oscilloscope will be the ADC's bandwidth and at what point it becomes non-linear in its readings
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Anton
Request: Could you make a series of building an microcontrolled bench psu, not modular 0-32 3a, something around 0-48v 6a for example: D
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Request: Could you make a series of building an microcontrolled bench psu, not modular 0-32 3a, something around 0-48v 6a for example: D
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me
1. How to make bidirectional home automation without display?
2. how to use more then 2 relays in bidirectional home automation?
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1. How to make bidirectional home automation without display?
2. how to use more then 2 relays in bidirectional home automation?
reply
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