Sow how are they making one go 300ft plus?
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Please be positive and constructive with your questions and comments.
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ok, so i'm trying to do a small project to make a board in eagle and get a successful prototype. The board is an EHP tv-b-gone, based off of oPossum's EHP, just i wanted it small as possible (no 10 pin header). Well, I quoted it at 4PCB, and got pretty bad prices for prototypes. Am i doing something wrong? Also, im leaving Monday for a week so ill read any help when i get back
the quote and the board:
the quote and the board:
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- Joined: Tue Mar 06, 2007 11:51 pm
Advanced Circuits (or any board manufacturer for that matter) will charge you an arm and a leg for a small production run (100 units or less). The best way to get a board is to find somebody who had a batch made, and ask them for one. Your best bet is something like Gold Phoenix, who for $90 will give you about 30-40 of these EHP sized boards. Alternatively, you can use BatchPCB and get a single board like this made for about $20.
Bottom line, professional PCBs are expensive in 1's and 2's.
Bottom line, professional PCBs are expensive in 1's and 2's.
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- Joined: Sun Mar 02, 2008 5:59 pm
ok, this is beginner, but it brings up too good of a point to miss. how exactly do i make a id via? is that different then a regular via? I am also not familiar with sizes. hw to i make it 20mil (is that millimeters? because that would be a BIG via)
Sorry for the begginer stuff, but all help is appreciated
Sorry for the begginer stuff, but all help is appreciated
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I don't think 20 mil will be big enough. Need at least a 28 mil finished hole.BANNED wrote:id = inner diameter. That will be the size of the plated through hole to be made. This has to be big enough in order for the IR LED leads to go through, but not too big.
At first I thought you were saying a via is needed so that the bottom side trace would be connected to the upper pad. As the artwork is drawn, they're disconnected.
One would not have to put the LED's into holes. You could lay them on the board and 'surface mount' them, but you still would need the via to get the power from the bottomside trace to the top.
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Ya, before i sent the board in, i put vias in (using sizes from other components holes). I dont even plan on mounting the LEDS on the board, just wires connecting them.
Thanks to alll who helped me through this, and especially oPossum who gave me an idea as to how the hell i was gonna layout the board. Oh i hope it works, and if it does i feel bad for best buy
Thanks to alll who helped me through this, and especially oPossum who gave me an idea as to how the hell i was gonna layout the board. Oh i hope it works, and if it does i feel bad for best buy
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Definitely need a scope, the pulses are really short.woody1189 wrote:i was using a multimeter but then i realized that those readings were most likely wrong. i was hoping to at least see some spikes above 100ma but all i got were low readings. i'm gonna test it on a scope once i go back to school next week.
Somewhere (I think in this thread) I posted scope traces of the V1 and V1.1 'like' TV-B-Gone which will give you an idea of the current being pumped into the LED's from those circuits.
FWIW, I just finished a small, single sided 8 LED EHP version TV-B-gone. I'm using a 1 cell lithium polymer battery. Pretty small little package, but I can't find my TSAL6100's to stuff the board with
Please be positive and constructive with your questions and comments.