omarm
Posts: 35
Joined: Fri Jun 16, 2017 1:36 am

Pi 3 - buy kit or buy separate? + Do I need heat sink?

Wed May 16, 2018 3:38 pm

Rasberry Pi 3 Model B - cost about £32.

Kit cost about £50 - includes 16GB SD class 10 with OS installed + case + charger.

I can save a pound or 2 buying separate - but is it worth it?

Thanks.

scotty101
Posts: 3221
Joined: Fri Jun 08, 2012 6:03 pm

Re: Pi 3 - buy kit or buy separate? + Do I need heat sink?

Wed May 16, 2018 3:43 pm

Unless you are using your Pi in a very hot environment and running complex calculations on it you do not need a heat sink. It is designed to "throttleback" if it gets too hot.

The kit is ok. Will work out a little cheaper for you but don't rely on the "pre-installed OS" working. Keep the SD card and burn the very latest Raspbian on it.
Always good to have a case.
Electronic and Computer Engineer
Pi Interests: Home Automation, IOT, Python and Tkinter

fruitoftheloom
Posts: 17817
Joined: Tue Mar 25, 2014 12:40 pm

Re: Pi 3 - buy kit or buy separate? + Do I need heat sink?

Wed May 16, 2018 4:29 pm

omarm wrote:
Wed May 16, 2018 3:38 pm
Rasberry Pi 3 Model B - cost about £32.

Kit cost about £50 - includes 16GB SD class 10 with OS installed + case + charger.

I can save a pound or 2 buying separate - but is it worth it?

Thanks.

Buy the latest 3B+ it has many improvements over the 3B, and the price is still $35 plus taxes and shipping:

https://www.raspberrypi.org/blog/raspbe ... le-now-35/
Adieu

jerrm
Posts: 59
Joined: Wed May 02, 2018 7:35 pm

Re: Pi 3 - buy kit or buy separate? + Do I need heat sink?

Wed May 16, 2018 4:59 pm

The 3B+ runs a good bit cooler than the 3B. Not likely to encounter temp based throttling at all unless overclocking or in a more extreme environment.

omarm
Posts: 35
Joined: Fri Jun 16, 2017 1:36 am

Re: Pi 3 - buy kit or buy separate? + Do I need heat sink?

Thu May 17, 2018 1:54 pm

thanks guys
i didn't actually notice the + in the 'B+'
i would have bought the older model.

happy to buy separate.
only concern is case.
in the past, i got some cases for an older model - they were shambles - something someone had laser cut on acrylic.

charger: assuming ANY usb charger will be ok?

thanks.

B.Goode
Posts: 6544
Joined: Mon Sep 01, 2014 4:03 pm
Location: UK

Re: Pi 3 - buy kit or buy separate? + Do I need heat sink?

Thu May 17, 2018 2:02 pm

charger: assuming ANY usb charger will be ok?
No! Don't assume that!

https://www.raspberrypi.org/help/faqs/#powerReqs

And:
Note that Raspberry Pi 3B+ does consume substantially more power than its predecessor. We strongly encourage you to use a high-quality 2.5A power supply, such as the official Raspberry Pi Universal Power Supply.
From: https://www.raspberrypi.org/blog/raspbe ... le-now-35/

jerrm
Posts: 59
Joined: Wed May 02, 2018 7:35 pm

Re: Pi 3 - buy kit or buy separate? + Do I need heat sink?

Thu May 17, 2018 6:40 pm

omarm wrote:
Thu May 17, 2018 1:54 pm
charger: assuming ANY usb charger will be ok?
If your buying an adapter, do as suggested and get a good quality 5v 2.5 amp unit.

If you have what you think is a good 2amp or better adapter already, it won't hurt to try it. Less than that and you are asking for trouble.

My test 3B+ has been put through extensive burn in testing with mem/CPU/GPU maxed out for extended periods on a quality 2A rated adapter and has been just fine, but the only thing attached to it is the monitor and a USB stick.

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