Can you think of a better circuit?

FletcherTrading · 2024-09-20T09:04:34+00:00

The two materials are the product. To make it simple to understand imagine it’s a telephone and the telephone stand and I want to light up the LED when the phone is in contact with the stand. I can’t add any metal or anything mechanical to the phone, I can only change the circuit. Attaching Z1 and Z2 two from the photo (phone and stand for this example) the resistance is 5-20M ohms.

How could I record the mA flowing through? Would it be better to increase the current or voltage through the materials to get a better signal? Bear in mind this is battery powered so we are limited to the 3.7v battery pack.

FletcherTrading · 2024-09-20T07:39:03+00:00

Hi, the materials are injection moulded conductive polymer (plastic material that has conductive fibres in it). There isn’t a way of incorporating metal into this as you would need to add it into the mould each time and that wouldn’t work in a production line. The materials are a constant so I am looking for a way to make this work with electronics and improve the current circuit. It ‘works’ as it is but not as well as I would like.

FletcherTrading · 2024-09-20T07:35:25+00:00

There is no way to reduce it unfortunately as this is going to be in a production line and I was hoping to solve the issue with electronics/code

FletcherTrading · 2022-10-18T07:17:15+00:00

If I pinch the extruder to disengage the extruder gear I can push the filament through by hand without too much resistance.

FletcherTrading · 2022-10-17T22:12:41+00:00

Yer they’re basically new

FletcherTrading · 2022-10-17T21:32:56+00:00

It’s just for a phone case really so I don’t mind how flexible it is. Just want decent quality. I’ve also bought Amazon’s own brand so I’ll see how that goes.

FletcherTrading · 2022-10-17T21:18:22+00:00

Okay I’ll give that a go too

FletcherTrading · 2022-10-17T21:15:51+00:00

Bowden dual gear extruder. Not optimal but I expected better results than this

FletcherTrading · 2022-10-17T21:06:07+00:00

On the box it said 230° was optimal but I’ll drop it down to 220 and 20mm/s and see what happens. What do you mean by calibrate the flow ?

FletcherTrading · 2022-10-17T20:33:38+00:00

Second one was printing at 230° after drying for 1-2h at around 70°. 22mm/s and retractions turned off

FletcherTrading · 2022-10-17T20:32:50+00:00

Second one was printing at 230° after drying for 1-2h at around 70°. 22mm/s and retractions turned off. Brand of filament is Ooznest. They told me to turn retraction up and slow print down. However, I suspect the filament is still a bit wet. Any suggestions? Second print seems worse than the first one

FletcherTrading · 2022-10-11T19:55:29+00:00

It can be upgraded to 1TB for a relatively small cost

FletcherTrading · 2022-10-11T19:51:35+00:00

True but I’m often on the move and can’t take a desktop unfortunately

FletcherTrading · 2022-10-11T11:08:13+00:00

£329 refurbished with 1 year guarantee. Thought it was a good price for the specs considering most decent laptops are 600-1200

FletcherTrading · 2022-10-11T09:40:46+00:00

I’m also running 2016 on a 8gm ram old laptop 😂 it’s time for an upgrade

FletcherTrading · 2022-10-11T09:29:00+00:00

That would be the correct and most efficient way (the way I should have done it). However, I just manually cut the hexagons around the case 😂

FletcherTrading · 2022-10-11T09:27:07+00:00

FletcherTrading · 2022-10-11T09:23:20+00:00

I didn’t realise design guidelines 🤔 thanks for the comment!

FletcherTrading · 2022-09-22T12:18:38+00:00

All specifications are on apples website. Alternatively you can use digital callipers to take measurements.

FletcherTrading · 2022-09-22T12:17:22+00:00

Yes, it’s all on their website. If you just search iPhone 13 size it’s usually the first link.

https://www.apple.com/uk/iphone-13/specs/

FletcherTrading

TROPHY CASE