Hiyas Xanxi
Why so much LEDs? What about 2*9 like in this thread?
I chose 150 leds as its just an easy number to work with when supplying 12v.
you can scale the number of LED's back and so will the amps
so that 15 LED's at 12v would cost you 2.4 watts
2.4 watts over 12volts = 0.2 Amps on the +12v rail.
So if you said two arrays of 15 SMD LED's using the +12v rail it would draw 0.4 amps from the PSU - this the Amiga PSU can do quite comftably - although I honestly dont think its all that wise to be honest...
the Amiga Powersupply is over 15 years old... these units were not designed to live 10 years, let alone 15 (in the case of the A1200) and over 20 years in the case of the Amiga 500!!!
@Jimbo
Looking very nice! i like the way its headding -
The cable used in most ATX PC power supplies can handle 15-20 amps (if not a lot more) on each rail - there is a calculation of width, length and if its just coppper / plated or an alloy - but thats math that doesn't need to be done on a wednesday... 10 amps would be a 100% overkill for the amiga any more than that in a desktop is NEVER likely to be seen - unlless you see flames - people jumping out of windoes.. lol
Now the best method for creating a reflective surface for the underside of the Amiga Plasics is to use a chrome-refelctive spraypaint..
Ingredients:
1. dish washer
2. some old news paper
3. some masking tape
4. some plastic primer (
battleship grey from poundland)
5.
Screwfix/ Halfords / Wilkinsons - just make sure its Acylic based =)
Method:
1. Getting the top part ready
Strip thetop plastic from the A1200 and place in the dishwasher on 50c (60c if you must) allow the dishwasher to cleans the plastic - once the wash cycle is complete remove the plastics before the drying cycle commences.
this may sound strange but wash your hands before hadnling the clean top pastic, remeber to remove any debris from the underside of the case. Now place the plastic top in an airing cupboard for approximately two hours.
2. Prepare your area
Create a 3-4 foot area where you can spray paint without the missues wanting to kill you for the damage to the carpet / surfaces - once don
e (and completed the subsequent argument of "no i wont get it on this or that") - its time to get the A1200 plastic out mof the airing cupboard.
3. Tape and Masking
Using the masking tape to tape newspapter to the cut-in of the keyboard *this is so that only the underside that you dont see is covered*
I would suggest - if you can - tape up (with news paper) the top viewable side of the top plastic - dont forget to do the side cut-in for the keyboard - this is important if you want it to look STOCK.
4. Undercoat-tastic
Now its time to laydown some undercoat... this should be quite simple just remember to shake the can well - and hold it about 16 - 20 inches away from the target - a technique I would recommend is in "short-controlled-bursts" of about 3 - 5 seconds... and then wipe the nozzel with a cloth. - shake and repeat untill you have a good cover. try not to let it pool - its better to two a couple of light coats than a thick heavy one.
so buzz over it in a horizonal fashion - give it about 20 minutes and buzz over it in a vertical fashion - couple of light coats is all you really need - now allow this to touch dry for about 30 minutes - and then put it away for a good day - so stick it in an airing cupboard or somewhere it wont be disturbed (dont remove the paper/masking)
*remember to clean the nozzel of the can - to do this hold the spray-can upside down and give it a 3 second burst press - this will clean the nozzel.
5. Chrome painting is FUN!!!
YAY the fun part, spray-painting a top coat on the underside of the plastic... cool eh?
simple as before - shake the paint as well as you can (your arm should feel like its about to fall off) and then about 16 - 20 inches away from the target do light coats - perhaps upto three.... now to coats will take a while to cure and its best to give a good 40 minutes between coats minimum perhaps even upto an hour - so read the destructions on the side of the can and see what it suggests... I would always add 15- 20 minutes to that time as temperature / humidity is never constant to the manufactures recommendation.
okay.... when finally done - clean the nozzel and allow this puppy a good day to dry and appologies to your partner on any spills or mis-haps that occured from a spooky ghost / pet that disturbed you
Once done you can remove the masking tape and paper and as a good Cosmos would say
"En voilà" =)
now... that lot should help or invoke the involentary ability of swallowing ones own tounge to save them from a death of bordeom...
=)