Proto-PIC - Electronic Component Supplier, based in UK is owned and operated by RelChron Limited which was founded in 2006.

We started the company to develop a product for the Oil Industry, a HydroStatic Pressure Testing System, which is still in wide use today.

During the development of this system, we accrued a whole pile of electronic goodies that we decided to sell on ebay to recoup some of the money we had spent. The items sold so fast we realised that there was a real need in the UK to buy electronics at good prices. We maxed out our credit cards and bought up lots of parts we thought there would be a need for in the UK and was born.

We buy electronics for the UK Maker Community in bulk from reputable suppliers only, generally from the USA. Buying in bulk allows us to be able to take care of all the Import tasks and paying Duty so the products can be available to customers in the UK on a super quick turnaround.

Our favorite supplier has to be Sparkfun Electronics in the US. They have been with us right from the beginning. Some of their components were in the original revision of our Pressure Testing System and they were the first guys we bought our first big (huge) order from to stock the place up. We sell every item that Sparkfun sell, unless its illegal to sell in the UK (some radio products are banned as they interfere with our wavelengths over here). Even if we are sold out of the item, we can get parts from them within 48 hours - if we place the order on Monday afternoon - it will generally be here Wednesday morning - that's pretty awesome!.

We knew that we had the ability and love of the products to be able to create some of our own. Our first in-house developed product was the Proto-PIC Arduino Starter Kit. We have sold over 10,000 of these to date. We now have a full range of products that are our own concept and design.

Our tech support team are fluent in Arduino C and can help with any aspect of design, code or assembly of your project.

The BBC Micro:bit is an ARM based embedded system developed by the BBC for use in education. It is aimed at getting kids into electronics - something very close to our hearts here - and can be programmed via a web interface. It has LEDs mounted on the board so kids can make scrolling messages or simple graphics. They can even connect up other things like temperature sensors using the croc clip rings on the board. We were really excited when we saw this and have lots of BBC micro:bit goodies in stock.

One of the things we learnt fairly quickly when we started out is that Packing efficiency is key. If you are selling fairly high value, fairly fragile parts - you want to pack them fast but protect them well. I was always concerned about ordering parts from websites and paying top money for shipping only for them to arrive having been dropped into a 7p Jiffy bag. We wanted to do something different. So we did our research and we have sent all our smaller orders in plastic boxes, since about 2010. This costs us a bit more, but we would be happier knowing that your items are extremely well protected during transit and just generally look nicer when you receive them. The boxes are meant to be reused by the customer, they can be used for storage - or can even be drilled and cut to make a nice enclosure. - We got such a great response from our boxes we now sell them as a stock item on the website.


Our company registration number is SC298119 and our VAT registration number is 880518413

Our postal address is: 

RelChron Limited
Unit 17, Kirkcaldy Enterprise Centre
Myregormie Place
Mitchelston Industrial Estate




Our registered address is:


RelChron Limited

C/O Harley Hepburn

28 Townsend Place



Great fun
Thursday, 2 November 2017  |  Rhys

Put this together with my 6yo son. It was just about the right level of complexity to hold his attention. Would be useful to have a switch as removing coin cells with a toddler around isn't a great idea. Fashioned one from a thin stiff strip of plastic food packaging and slid it under the battery, then folded down the tabs on the battery holder to keep the battery in place. Worked for us

Acrylic case for Micro Bit
Thursday, 2 November 2017  |  Martyn

Excellent product, great price. Easy to assemble. Protects the Micro Bit and looks good too. Quick delivery. Highly recommended.

Best website
Wednesday, 1 November 2017  |  Arsalan

One of the best online shopping experience of recent times for me.
Everything went smooth and the product arrived on perfect time.
Just perfect.

Great product.
Monday, 30 October 2017  |  Peter

I've used a few of these Pololu switch mode regulators. They are extremely compact, efficient and work well. I'd recommend the entire range.

Does what it says on the tin!
Monday, 30 October 2017  |  Peter

I use this in an accurate power meter application measuring AC power in the range from 3KW down to a few watts. It works as specified in the datasheet. I'm seeing no significant noise pickup or phase error. Great product.

These work beautifully
Monday, 30 October 2017  |  Peter

I use these with the MicroPython Pyboard which has an official driver for the chip. I have four which have been in continuous use for a couple of years logging data from around the place. Highly recommended.

Very useful
Monday, 23 October 2017  |  John

Wanting to use ATtiny85 chips but often not needing a dev board for every IC I use as I want a very small minimal circuits I prefer to buy bare chips and the cheapest don't have a bootloader. Not wanting to use one of my Arduino dev boards as an ATtiny85 (my personal favourite ATtiny IC) programmer I thought it time to get an AVR type programmer. Having half a dozen ATtiny85 chips to programme I gave it a good test. Some of them were 'raw' ICs with nothing installed and some had been already programmed using a UNO R3 and all six programmed without a single glitch. Also have the added advantage that I don't need to waste memory on a bootloader so can pack in bigger programmes. . All in all an excellent piece of kit that I have no problem recommending.

Solder joy
Monday, 9 October 2017  |  Luke

Great solder, really flowed well and made troublesome joints much easier

Quality soldering station - the real deal
Thursday, 5 October 2017  |  Marcus

Do not be tempted by eBay equivalents - there are a large number of fakes there and compromises will have been made like plastic stands etc.
This is a quality item with 100% metal iron stand, heavy power station and nice feel. The silver grey finish is as others have said much nicer than blue/yellow.
The temperature controls are not the most intuitive but I guess if you change them a lot you would get used to them and if you don't, like me, then it's not really an issue.
Very pleased with my purchase and Proto-pics service is great. Next day delivery via the best courier IMHO (DPD) with no problems.

AMP:BIT class D amplifier
Wednesday, 4 October 2017  |  John

This is one of the many add-ons for the micro:bit that I have purchased from Proto-pic. It has been designed and built to the very high standard that we have become accustomed to from this company.

Being a musician, amongst other things, I was keen to see how the micro:bit played music and also speech using the various coding methods available. There are terminals at each end of the board to connect a small loudspeaker or mono headphones. The speaker needs some very simple soldering via short leads to the board but the headphones are connected via a 3.5mm socket. Although I have a collection of headphones and earphones at hand I was keen to use a safer method of listening to the output. There is a very adequate volume control on the board but I couldn’t trust children not to fiddle with this. A search on the web came up with a mini pillow speaker which conveniently had a 3.5mm jack a the end of a decent length of cable. I bought mine from Amazon for £5.77 and it was called Elegiant. This pillow speaker is a perfect partner for the AMP:BIT, the sound level set at maximum with the on-board volume control would probably be enough for classroom use.

I have had some interesting results with this combination and have been impressed, even with the speech capabilities of the micro:bit.

I am particularly pleased with the AMP:BIT and pillow speaker combination. Can I recommend that you download some Micro Python code cleverly written by BBC micro:bit expert Nicholas Tollervey to show off this combination. It is the song ‘Daisy, daisy’ as was sung by the HAL 9000 Computer in the film 2001: A Space Odyssey. The micro:bit performs this superbly through the very nice little AMP:BIT and speaker. A YouTube demo of this can be found at which also gives a link in the accompanying text to the website where the program can be downloaded from. You will be no doubt be impressed to hear actual words being sung using these devices! (

Free Technical Support
Fast Delivery Options
Customer Loyalty Scheme

Proto-PIC - UK Distributor of Sparkfun, Arduino, BBC Micro Bit, Adafruit Electronic ComponentsProto-PIC ; UK Distributor of Sparkfun, Arduino, Adafruit, BBC Micro Bit electrical components