Opensource anchor light

[GHA]

Is the lateest circuit correct?
.

Well spotted, its wrong. Gate should be connected to the cathode and anode to ground.
Ta

 

[rszemeti]

You would be better off replacing the two SMD components with through hole, it's not worth the inclusion of SMD assembly for just 4 components which could easily be swapped for standard.

I did point out the circuit error at message #12

 

[GHA]

I gather that there are minimum order constraints on circuit boards - has anyone got spare boards?

JLCPCB have min order or 5 (today anyway), I just roughly priced up 10 -
Boards & surface mount bits assembled > £17
Delivery > £7
LCSC remaining components > £11
Delivery > £7

So about £40 or four quid each for the boards and components.
LEDs > looks like about 50 quid for 250 (gooduns!!)

So about under a tenner a light, then need some 50mm plastic pipe and epoxy or something to fill it up with and some time to put it together.

Then you've a hopefully *very* bright ultra reliable low current auto on/off light.

Some of that ugly work thing going on at the moment so this will prob be put on hold for a while.

But DOH - you should be able to fit 4 circuits on each PCB so that would bring the cost down a bit, can't be bothered to get new quotes again at the moment though

Latest PCB - holes to break out for bypassing the photo resistor and wiring in a pot to change the current output.

 

[gregcope]

You csn combine jlcpcb and lcdc delivery which reduces your costs £7!

 

[GHA]

You csn combine jlcpcb and lcdc delivery which reduces your costs £7!

Apparently not ---

Notice about Combining Shipment with PCBsUpdated:


Due to the export declaration issues, unfortunately, we have to cancel the combination shipping of PCB order since Mar. 11th GMT+8 2019.


Thus, PCB orders and component orders will be shipped separately currently.


As JLCPCB’s sister company, we keep offering our best support to customers from JLCPCB, and shipping discount up to 15$ is offered to the customer who is placing the PCB order:

Though looks like might be a discount in there , not sure if it was in the quote i got.

https://support.lcsc.com/article/24-do-you-offer-combine-shipment-with-pcbs

 

[gregcope]

Pants

 

[GHA]

So not really that interested in selling, but assuming it works as a really bright waterproof ultra reliable auto on/off - what6 sory of price would you budget minded cruisers be willing to pay? 20 quid, thirty? ........

 

[GHA]

Should look something like this..

 

[GHA]

Boards just turned up - look ok but will it work.......
Messed up a bit, could have had the transistor mounted already for a few cents, oh well

 

[GHA]

That's really bright!!

LED's just soldered on one side as a test, this one can be a stern light. Pulling about 160mA @ 12.2v.
Didn't really think it would work first time. Who wants one

 

[Graham_Wright]

LED's just soldered on one side as a test, this one can be a stern light.

How do you intend to achieve a crisp cut off at the 135° angle?

 

[rszemeti]

..

 

[GHA]

How do you intend to achieve a crisp cut off at the 135° angle?

Prob just a little piece of plastic baffle each side and look at the light pattern on a sheet of paper when fiddling, there'll be a way