Page 1 of 1

How to reduce the price of this?

Posted: Tue Dec 18, 2018 9:00 pm
by jacobthefox
Hi, so I'm looking into doing my first raspberry pi project, making a laptop. I've put together all the parts I should need, but it's come up to £140 which is quite hefty. That isn't even including the case which'll probably add another £20.

Is there anyway to reduce the price of this? The arduino is for a trackpad modification. Here's the amazon list link:
http://amzn.eu/41m6tMj

Thanks.

Re: How to reduce the price of this?

Posted: Tue Dec 18, 2018 10:56 pm
by Imperf3kt
We're sorry. The Web address you entered is not a functioning page on our site.
Whatever your list contains, it sounds about right price wise. Not much you can do, the Pi is cheap, accessories are not.

Re: How to reduce the price of this?

Posted: Wed Dec 19, 2018 8:42 am
by jacobthefox
Okay, thanks.

Re: How to reduce the price of this?

Posted: Wed Dec 19, 2018 9:01 am
by fruitoftheloom
jacobthefox wrote:
Tue Dec 18, 2018 9:00 pm
Hi, so I'm looking into doing my first raspberry pi project, making a laptop. I've put together all the parts I should need, but it's come up to £140 which is quite hefty. That isn't even including the case which'll probably add another £20.

Is there anyway to reduce the price of this? The arduino is for a trackpad modification. Here's the amazon list link:
http://amzn.eu/41m6tMj

Thanks.
To put into perspective see:

https://cpc.farnell.com/pi-top/pt01-gy- ... dp/SC14385

https://www.argos.co.uk/product/8086923

Re: How to reduce the price of this?

Posted: Wed Dec 19, 2018 9:19 am
by bensimmo
The Amazon link doesn't work for me, but look at the China sites, AliExpress, Banggood etc.

Or find scrap parts from other things.

Re: How to reduce the price of this?

Posted: Wed Dec 19, 2018 6:41 pm
by Imperf3kt
fruitoftheloom wrote:
Wed Dec 19, 2018 9:01 am
jacobthefox wrote:
Tue Dec 18, 2018 9:00 pm
Hi, so I'm looking into doing my first raspberry pi project, making a laptop. I've put together all the parts I should need, but it's come up to £140 which is quite hefty. That isn't even including the case which'll probably add another £20.

Is there anyway to reduce the price of this? The arduino is for a trackpad modification. Here's the amazon list link:
http://amzn.eu/41m6tMj

Thanks.
To put into perspective see:

https://cpc.farnell.com/pi-top/pt01-gy- ... dp/SC14385

https://www.argos.co.uk/product/8086923
The pi-top mentions not including a Pi.
It also states it contains hazardous material!?
I assume this just means the battery, but...

Re: How to reduce the price of this?

Posted: Wed Dec 19, 2018 6:54 pm
by mooblie
This is an interesting alternative project:

https://makezine.com/projects/build-ras ... ur-pocket/

It makes a Pi-powered computer in a clam-shell case the size of a pack of playing cards when shut.

I wouldn't underestimate the wide range of different skills needed though. It will, of course, void any warranty on any parts you use too, including the Pi. More a novel idea, than a realistic practical computer. But it might give you some ideas.

Fun nevertheless!

Re: How to reduce the price of this?

Posted: Wed Dec 19, 2018 7:24 pm
by Imperf3kt
mooblie wrote:
Wed Dec 19, 2018 6:54 pm
This is an interesting alternative project:

https://makezine.com/projects/build-ras ... ur-pocket/

It makes a Pi-powered computer in a clam-shell case the size of a pack of playing cards when shut.

I wouldn't underestimate the wide range of different skills needed though. It will, of course, void any warranty on any parts you use too, including the Pi. More a novel idea, than a realistic practical computer. But it might give you some ideas.

Fun nevertheless!
Note the choice of a Pi2b.
This kind of project will not work for any Pi 3 model, so if the processing power of a Pi3B, 3B+ or even 3A+ is desirable, this project cannot be done.
That may change with the Pi4, but we will just have to wait for it to exist first.

Re: How to reduce the price of this?

Posted: Wed Dec 19, 2018 7:30 pm
by DarkPlatinum
1. Raspberry Pi 3B+ £35
2. Screen £50-60? (not sure as what size you want)
3. Cheap keyboard plus trackpad £8 max https://www.ebay.co.uk/itm/UK-Wireless- ... :rk:2:pf:0
4. Case £20
5. Anything else?

Total around £130 or so

Re: How to reduce the price of this?

Posted: Wed Dec 19, 2018 8:33 pm
by Imperf3kt
DarkPlatinum wrote:
Wed Dec 19, 2018 7:30 pm
1. Raspberry Pi 3B+ £35
2. Screen £50-60? (not sure as what size you want)
3. Cheap keyboard plus trackpad £8 max https://www.ebay.co.uk/itm/UK-Wireless- ... :rk:2:pf:0
4. Case £20
5. Anything else?

Total around £130 or so
Do you install the operating system on recycled cardboard?
How do you power it?
Does the screen work via WiFi?

Add to list:
Power supply
Micro SD card
HDMI cable

Re: How to reduce the price of this?

Posted: Thu Dec 20, 2018 10:44 am
by jacobthefox
Whoa, didn't see all of these replies. Here's the part list:

Raspberry pi 3 B+
5 inch screen (£30)
Folding keyboard (Keeping form factor down)
2500mah Adafruit lipo
Adafruit charger

I've already got a microsd card and HDMI cable. I'm thinking of getting the case custom 3d printed, which will be expensive, I'm aware.

Re: How to reduce the price of this?

Posted: Thu Dec 20, 2018 7:31 pm
by DarkPlatinum
Imperf3kt wrote:
Wed Dec 19, 2018 8:33 pm
Do you install the operating system on recycled cardboard?
How do you power it?
Does the screen work via WiFi?
Funny you should say that, because I doo on't

£8 for micro sd
£4 for hdmi
10000mah battery (not sure as I don't think you can buy one of this capacity)

Re: How to reduce the price of this?

Posted: Thu Dec 20, 2018 7:37 pm
by DarkPlatinum
jacobthefox wrote:
Thu Dec 20, 2018 10:44 am
2500mah Adafruit lipo
Adafruit charger

I've already got a microsd card and HDMI cable.
Are you powering the screen with the lipo as well? If so, your not going to have a good amount of time to use your Pi.

Based on this site: https://spellfoundry.com/raspberry-pi-b ... alculator/

I am guessing your Pi should get around 4 and a half hours time without the screen being powered from the battery. It might just be best for you to get a seperate 10000mAh powerbank to power your screen

Re: How to reduce the price of this?

Posted: Thu Dec 20, 2018 8:13 pm
by HawaiianPi
If your goal is to learn something and get DIY experience, then go for it.

If your goal is to have an inexpensive portable computer, get a cheap Chromebook. It will cost less and be a much more functional device.

Re: How to reduce the price of this?

Posted: Thu Dec 20, 2018 8:37 pm
by bensimmo
For ease, go for a 10 or 20Ah all in one battery. Take the case of and you'll have a double cell LiPo layout, a power on/off button a charger and two USB power out's (something similar to that). One output for the Pi at 2/2.5A and one for the screen if needed.

be about £15/£20 from Amazon depending on deal.

It'll save you from the charger, the 5V booster and you'll get a lot longer run time (for more weight and size though)

Re: How to reduce the price of this?

Posted: Thu Dec 20, 2018 8:45 pm
by Imperf3kt
bensimmo wrote:
Thu Dec 20, 2018 8:37 pm
For ease, go for a 10 or 20Ah all in one battery. Take the case of and you'll have a double cell LiPo layout, a power on/off button a charger and two USB power out's (something similar to that). One output for the Pi at 2/2.5A and one for the screen if needed.

be about £15/£20 from Amazon depending on deal.

It'll save you from the charger, the 5V booster and you'll get a lot longer run time (for more weight and size though)
At the expense of being unable to use it while charging and being unsure if the regulator actually supplies the current it states.

Hint: most don't. They're usually constructed from the cheapest possible equipment that gets the job done satisfactorily. Since that job is supposed to be charging a mobile phone battery, maintaining a stable 5 volts is very low on the priority list. As long as it doesn't dip below 4.35v, it's fine... For phone charging, but not powering a Pi which does not like going below 4.65v

Re: How to reduce the price of this?

Posted: Fri Dec 21, 2018 10:07 am
by bensimmo
My Amazon and Aukey all work fine, I can only go off my experience.

These aren't Poundland bargains.

Most the lipo convertor will only get to 1A, which is not really the best for this project.