Underwurldes - Diy Auto Top Off Project

[sophos9]

Andy, thanks for the update!!

Have converted the parts to excel, will get on Farnells later today... Not sure what size enclosure to order, best to order this when the board has had its components attached, get the right size & shape then?

I see you have also added the facility for the sensors to be switched off, unreal fella

 

[Underwurlde]

OK, found a nice cheap box:

Farnell again:

Mfr: Hammond
Farnell # 3536520
MOQ: 1
Cost: £3.44
Mfr Part # 1591DSBK

I have drawn it in ACAD and created a new PCB outline, and the larger parts, the mains inlet sockets and the transformer seem to fit in nicely into the available space. 'Perfek'.

The box measures 150mm x 80mm and is 46mm high.

Andy.

PS, I use 2 mains inlet sockets. They are the same parts, i.e. BOTH will accept a PLUG as they are BOTH sockets. This is dangerous of course, because that means that if the pump is not plugged in, then there will be live exposed pins on the pump socket. It is typical that I manage to get ALL the parts I want for this project APART FROM ONE. I therefore leave it up to you - use 2 sockets, source another part and hope it fits etc etc.

If I have time I will try to source a PCB mounting one from elsewhere.

 

[sophos9]

Hi mate,

Nice one - thanks for sourcing that... Check this female pcb mains, that OK to use?

 

[Underwurlde]

Yes, that is OK to use.

I'll design the PCB such that the one you chose above can be screwed in place of the other and you then simply wire it from the plug to the PCB.

Sorry, I'm just a perfectionist - I wanted to use a PCB mounting version.

Andy

PS
I think a 20mm fuse is also missing from the parts list - I have listed there a fuse HOLDER of course. Make it 1A 250V 20mm

 

[sophos9]

Yes, that is OK to use.

I'll design the PCB such that the one you chose above can be screwed in place of the other and you then simply wire it from the plug to the PCB.

Sorry, I'm just a perfectionist - I wanted to use a PCB mounting version.

Andy

PS
I think a 20mm fuse is also missing from the parts list - I have listed there a fuse HOLDER of course. Make it 1A 250V 20mm

Sorry mate, thought that was a PCB mounting - my bad!!

Be a perfectionist mate - then build these things on demand, if you can source optical sensors then you have built something with more error trapping that the £100 Tunz!!

 

[sophos9]

Andy,

This fuse should be OK right?

All parts available apart from the 2 way terminal block - says not available, no longer stocked - you think its one of those that they still do have?

 

[Underwurlde]

Spot on with the fuse.

Re: Terminal block - welcome to the world of engineering! Typical, why put it in the bloody book IF IT AINT AVAILABLE FFS.

I'll have a look at a replacement.

Andy

PS
Progress - Just finished making a bonza Lasagne, now just starting to do PCB footprints (Agian) - I've about 30 in total to do, 13 to go... 'awkard' ones are done (it's unravelling skimpy datasheets is the problem / understanding their mech drawings, esp in Japanese / Chinese / German etc)
Fun fun fun though!!!

 

[sophos9]

Nice one mate - I just made a bowl of Super Noodles (well I had pizza hut for dinner )

I did have a look around for some 5 pitch with 2.08mm at 200v, not a lot mate although I'm sure you will find something. When you have I will update the BOM and post it up here...

As always, thanks!

 

[sophos9]

Andy,

Is this one any good - 415v with max 17.5a 5mm pitch with 1.5mm2 wire?

 

[Underwurlde]

Perfeck.

That was my option 'B', but I thought the other ones came in a nicer shade of green.

Well, we didn't want it non-colour co-ordinated, did we?

Andy

 

[sophos9]

Great stuff... Right I have added the fuse, box, changed the terminal and added the female mains output. Total £30.12inc ex del... Not bad hey!

Anything other parts you can think of?

 

[Underwurlde]

£30? Are you sure? Closer to £20 perhaps? Hell, I could be wrong, it's getting late.

Must Sleeeeeeeeeep

 

[Underwurlde]

Ooo err, things are still getting a bit cramped!

[edit]: rotated it in the wrong direction! Read this right to left!
Box outline in red (should be yellow)
Mains socket, fuse holder, mains switch.
Transformer, above that the relay.
Then the rectifier and large 1000uF smoothing cap
And finally the (new) mains outlet (looking at the datasheet is IS PCB mounted - lucky you stumbling across that).

Andy

PS Just to keep you keen you understand!

 

[sophos9]

£30? Are you sure? Closer to £20 perhaps? Hell, I could be wrong, it's getting late.

Must Sleeeeeeeeeep

Sleep is good brother!

Yup, its all sitting in the basket with Farnell - its because some of the things like LEDs are min order of 10 instead of 5, same with some of the diodes...

Wow, that diagram is looking sweet! Packed though!! Cant wait to get soldering....

 

[Underwurlde]

Hmm, I factored that into my choice of components... (Hence the MOQ column), and component totals were indeed collated to this.

ho hum,

Andy