I guess you were originally thinking of running 30mA, which would have given that number?

 

30 degree viewing angle would be a minimum, more would be nicer.  Just be a bit careless at soldering them in straight, and you'll gain another few degrees of spread.   :sun:

Untidy?

Never gonna happen!

Engineers brain says neat and lined up please.

I haven't seen a +/- 10% resistor since college 30 years ago; I am pretty sure the only place you will find them (other than colleges), is in junk yards - everywhere else 1% will be the MINIMUM, and many places selling 0.1%.

Quite agree- most common are 1%, as supplied by places like Maplin. GG- in my last spell at college (1992), all the resistors were 1% or similar . I remember the old carbon types and the others as per the C & G handbook, written in the dark ages. Valves CV 200? ,SOLDERED IN . And .25W resistors in a small bulk. Now the 1% are at least .6W It always amazed me that telecomms  kit fro over the pond used plug in valves, but BPO stuff insisted in soldered in valves.

Quite agree- most common are 1%, as supplied by places like Maplin. GG- in my last spell at college (1992), all the resistors were 1% or similar . I remember the old carbon types and the others as per the C & G handbook, written in the dark ages. Valves CV 200? ,SOLDERED IN . And .25W resistors in a small bulk. Now the 1% are at least .6W It always amazed me that telecomms  kit fro over the pond used plug in valves, but BPO stuff insisted in soldered in valves.

 

I taught GCSE Electronics at a college for a short wile - back in about 94/95; the text books and course still talked about 10% resisters, but even then the college stock was all 1%, however only a couple of years prior - at a different college - I saw plenty of old 10% stock still in use.

 

BTW, even by 1995, most of the resisters I had been using in industry were 0.1%, so going back to even 1% was a bit of a shock.(now of course, it is nearly all SMT - which can only be removed and replaced manually if you are part octopus).

5% seems to be the norm e.g. http://www.bitsbox.co.uk/index.php?main_page=index&cPath=83_84_85 (UK that is!)

I suspect that may be a typo and they mean 0.5% for carbon and 0.1% for metal film.

 

Either that, or they are selling old tat.

 

BTW, the site may be in English, but it is hosted in Germany.

I'd tend to agree. Maplin ones are metal film ( less noisy~) and 1%. However for car applications, you MIGHT like to start by defining the voltage. I'd look at using something well inside car volts parameters, such as a 10 v regulated supply . ( avoids having to look at extremes of supply volts ,from possibly 11.5 to 14 , then calculate resistor values to keep LED current within parameters etc). Alternatively you could look at using an on board dc-dc convertor ,such as a 5-12v 2w type. Simply use a 5v ,2w regulator to drop supply to a stable 5v, then use a 5- 12v ,2w converter ,or more ,as each will provide 12 v at 166mA. it is possible to parallel these up ,using a forward diode configuration on the output to give higher wattages,in a small space, with a very low component count. Each converter would ( by my reckoning) supply eight paths of six diodes = 48 LED.