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California Frau's dh - or anyone else who knows their way round a Maplin catalogue?

14 replies

roisin · 27/12/2007 16:12

My uncle has come up trumps and put together a fantastic box of electronics bits for ds1 and ds2 to solder together.

For them to get started I need to get:
Some 'boards'. They want to start doing tiny little simple circuits, so we need tiny boards, or ones that are easy to cut up. Do we need stripboards, or PCBs, SRBP matrix board or what? Could you do me a link to the appropriate products.

I also want to buy some LEDs as they are fun apparently. Will this set be OK?

Do we need 'pins' as a book we have says they are useful?

Also what is the best way to attach batteries. If we put pins on and then croc clips at the end of wires to a battery we could fasten/unfasten the battery easily. Is this a good idea?

In the past ds2 has assembled relatively complex 'electronics kits', but they are so complex he isn't actually learning what things do/how things work. So he/we actually want to start from scratch: build a simple circuit with a light. Then add a switch, see what happens. Then add a capacitor, see what happens. etc, etc. But with the 'fun' of soldering rather than just assembling.

Do we need any 'wires' at all? Or can he just solder round the corners, between the rows, or whatever?

The maplin catalogue talks about 'etching' and so on. What's that about, and does it need to affect us at this sort of level?

The book we have is useless. Do you think this would be any better?

He does have a 'special screwdriver' and also a current tester or something that his uncle included as being essential. Is there anything else you can think of that he might need to get started?

Many thanks!

OP posts:
roisin · 27/12/2007 22:40

bump

OP posts:
Ubergeekian · 27/12/2007 22:58

The easiest stuff to solder to is strip board (aka veroboard). Maplin FL17T. However, it's sometimes a bit awkward to translate from circuit diagram to circuit board, and you will need a cutter to divide the copper strips as well. Don't even think about etching - it's complicated, messy and uses cyanide as the etching chemical.

Make sure you have a good soldering iron. Antex is the brand, and an FY68Y will get you an 18W iron plus stand. Unfortunately, Maplin have wimped out and only sell lead-free solder nowadays. Great for people who use it all day for years, but the additional risk for hobbyists is negligible and it's not as nice as the lead-tin stuff to use - it has a much higher melting point for a start.

I'd strongly advise against soldering at the moment - it's great for making designs but bad for designing and experimenting. Instead, go for a solderless breadboard system: I suggest the Maplin RH21-B, which has connector and places for switches and lights built in. You'll need some connecting wires - a few FS67X pack should do it.

You can connect to a PP9 battery with a special clip - HF28F.

As an alternative to all this, maybe a solderless experimental kit, like the N72FR would be a good way to start? They could then make permanent versions of the circuits they like using the stuff you've been given.

Good luck.

PS Credentials: ran residential electronic/robotics/inventing holidays for years.

roisin · 27/12/2007 23:02

Ooh thank you so much you wonderful person!

He has a soldering iron already: I've no idea if it's a "good" one, but he can make it work fine, so seems OK. We have tons of solder - I think some of it is lead-free and some not: anyways it all works!

We have got a breadboard, but none of us is entirely sure what it is or how it works

I'm off to look at the site now and fill my shopping basket. Thank you so much for the codes.

Rx

OP posts:
roisin · 27/12/2007 23:11

is this a cutter?

OP posts:
CremolaFirCone · 27/12/2007 23:11

dh agrees with ubergeek 100% and has checked the maplin catalogue. also reccomens this book:
'101 spy gadgets for the evil genius' for next christmas! also available from maplins!

wildfish · 27/12/2007 23:23

Board - etch boards require you to follow generally the following steps. Design board, print design, expose UV masked with design, put in chemicals to remove unexposed areas...and you have a circuit board, you can then drill the holes and solder components.

I suspect though the matrix, strip or tripad board are better for you

www.maplin.co.uk/Module.aspx?ModuleNo=1918&criteria=circuit%20board&doy=27m12
to break tracks
www.maplin.co.uk/Module.aspx?ModuleNo=1926&criteria=circuit%20board&doy=27m12

trip ad
www.maplin.co.uk/Module.aspx?ModuleNo=1922&criteria=circuit%20board&doy=27m12
www .maplin.co.uk/Search.aspx?criteria=JP53H&DOY=27m12
(Don't pick the plain ones)

LEDs no harm buying them, you'll need to check the spec about what voltage is required. There's no info listed that I noticed.

PINS, suppose they could be useful, but wires would work too.

Batteries I would use
www.maplin.co.uk/search.aspx?MenuNo=11901&MenuName=Battery+Clips&FromMenu=y&doy=27m12

an d then
from here
www.maplin.co.uk/search.aspx?MenuNo=11900&MenuName=Battery+Boxes&worldid=7&FromMenu=y&doy=2 7m12

example
www.maplin.co.uk/Module.aspx?TabID=1&ModuleNo=31427&doy=27m12

Yes you can solder directly. But wires will be useful. (goto equipment wire) and look.

e.g. www.maplin.co.uk/Module.aspx?ModuleNo=6202&criteria=1mm%20wire&doy=27m12

You don't say what you were given or have, so some basics which you may already have
desoldering pump
www.maplin.co.uk/Module.aspx?ModuleNo=97040&criteria=desolder&doy=27m12
and or desoldering braid
www.maplin.co.uk/Module.aspx?ModuleNo=29016&criteria=desolder&doy=27m12

multimeter for debugging
www.maplin.co.uk/Module.aspx?ModuleNo=37279&C=Maplin&U=SearchTop&T=multimeter&doy=27m12

Wire cutters/stripper,
small pliers needle nose (components get hot when soldering)
www.maplin.co.uk/Search.aspx?criteria=needle%20nose%20plier&source=15&SD=Y

Sho uld be enough, then as time goes on, you think that would be good, so would that etc etc

roisin · 27/12/2007 23:33

Ooh I'm really excited - but Maplin has just emptied my basket, so will have to try again in the morning!

He's already pretty experienced at soldering, so has wire cutters/strippers and a de-soldering pump.

My uncle has also given him a multimeter and a mains tester screwdriver (whatever those are!)

I just hate that I know so little about it. And when I delve deeper in the maplin site it all just gets more confusing.

I'm going to buy some LEDs, some stripboard, and a cutter to be ready here for when he gets back from Grandmas. Then he can get stuck in and get started and see how he gets on.

Thank you all for your help

OP posts:
Twinklemegan · 27/12/2007 23:48

I've shown this thread to DH, who used to be an electronics technician before being a SAHD and has built loads of stuff for the MOD.

DH agrees with Ubergeekian about the soldering thing - best avoided at this stage, especially since if you make a mistake you need a solder pump or a "wick" to remove the solder - a bit of a pain. BTW, the lead-free solder thing isn't just Maplin "wimping out" - it's an EU directive. Only critical industries get concessions (such as defence, aircraft, etc.) - thank god, says DH, as the lead-free stuff is utterly crap.

Twinklemegan · 27/12/2007 23:48

Sorry, just saw that you know about the de-soldering pump etc. already.

roisin · 27/12/2007 23:56

He likes the soldering though
That's all part of the fun!

I will get him one of those breadboard things (and hope we can understand it!) then he can try out his circuits before he builds them.

It all make me just a teensy bit sad though. I know what he really needs is someone to show him/to it with him. And the someone was definitely my dad - who had a special bond with ds2, and bought ds2 his soldering iron (for his 7th birthday ).
But unfortunately my dad died last year.

So I'm doing my best to learn enough to help ds2 really get started, then he can teach me!

OP posts:
Twinklemegan · 28/12/2007 00:04

I don't think DH likes soldering very much any more since this new stuff came out, but then he does it for a job which is different. BTW, good on your uncle for getting such a brilliant present. I'm sure DH would be happy to help out with any other questions you might have.

Ubergeekian · 28/12/2007 03:44

Lead-tin solder is still allowed for amateurs. I'm not sure how much time we've got left to buy it though - I have several kilogrammes in stock for the evil day. Rapid Electronics still list it.

Some of the new lead-free stuff isn't too bad (when I run things in schools I give them the option of lead-free if they want) but it's a real bugger with an old soldering iron, because of the higher melting point. Antex have bumped tip temperatures up by 30-ish degree now, and that seems to have helped.

OverRated · 28/12/2007 04:15

I just read this to my Dad who is an electronics geek - he nodded wisely as I read out wildfish & ubergeek's posts and seemed to think bread board is the way to go.

I like soldering too.

roisin · 28/12/2007 10:52

Right I've placed my order, so I'm happy now.

What I really don't understand yet, is how an "electronics learner" makes the jump from very simple circuits to relatively complex ones.

I can understand a simple circuit with basically a ring of current from/to a battery with a light/switches/whatever within the ring. And we are capable of building such a thing.

But ds2 builds these tiny little kits, and when I look at the circuits I can't even begin to work out the route of the flow of electricity. And I can't begin to imagine how you can design things like this.

Is it just that there are little 'set pieces' that you insert? So if you know you need a transistor, say. That you know you have to put in a certain group of components with the transistor laid out in a particular way.

Or what?

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