Binky again!

[stillp]

Episode 39 is mainly electronics: 

Pete

[TR8IAN]

That took some watching!

[ctc77965o]

Looks to me like they should stick to making brackets, that 'printed' circuit board looks like an unreliable waste of time...

[Lebro]

Quite painfull watching some of it, but well done for learning to program the u computer.

Those LM7805 5 volt voltage regulators should have had some capacitors across the leads to prevent instability.

Also, there are many LED bulbs out there which can be dimmed by reducing the voltage (which would have been much simpler ! )

Bob

[Charlie D]

17 hours ago, Lebro said:

there are many LED bulbs out there which can be dimmed by reducing the voltage (which would have been much simpler !)

There are a lot more things that you can do with those LEDs than just dim them. Each one consists of three individual LEDs and a controller. You can set each of the three colours to any one of 256 brightness levels, thus being able to create millions of different colours.
A  strip of  150 LEDs  and an Arduino Nano (to control them) will cost about £20.
The whole lot just need one wire  to connect them to the Arduino and a +5V supply and ground. Each LED is daisy-chained to the next and the position that the LED is in the strip is the reference number you use in the software to switch that LED to the required colour.

https://www.ebay.co.uk/itm/387079119586

Even the software is not too difficult to write. There are dozens of examples on the net that can be tweaked to do what you want.
I only know this because I've been building a pinball machine and wanted lots of flashing lights. I was daunted by the complex wiring I'd have to do to join sets of  individual LEDs together and then control them.

This method is a lot easier

They would look great along the length of  a sidescreen  TR sill.
You could easily program them to  do a running colour change whose frequency was in sync with the speed you were doing.
 

Charlie

Edited November 11 by Charlie D

[BlueTR3A-5EKT]

Jolly nice to see the return of Project Binky.

Did they encapsulate/glue/pot the solder traces to the board?  

My fear would be them all flapping about and shorting once the first hump back bridge had been taken enthusiastically 

 

[stuart]

14 hours ago, BlueTR3A-5EKT said:

Jolly nice to see the return of Project Binky.

Did they encapsulate/glue/pot the solder traces to the board?  

My fear would be them all flapping about and shorting once the first hump back bridge had been taken enthusiastically 

 

We used to hot glue encapsulate boards to cope with the stress of being on the road.

Stuart.

[ctc77965o]

Making reliable electronic assemblies, especially for automotive, is a tough game...moisture exposure can cause "popcorning" where the components literally explode when they get hot, atmospheric exposure (especially nitrogen oxides and sulphur compounds in exhaust fumes) cause corrosion that destroys electrical connections but the biggest challenge for us semiconductor guys is "CTE mismatch" where the different thermal expansion of the plastic, metal and ceramic parts means the components and board literally tear themselves apart.. encapsulation helps with corrosion but can worsen CTE problems just because that bulk of encapsulant expands and contracts like hell.

Let's hope the BinkyBoys use a conformal coating at least and have enough fuses to prevent a dash fire.

[Lebro]

I suspect that once they have got their circuit to be as they want it, then they will get a proper PCB made up.

Bob