Bottom-firing surface mount LED?

Lumex

Cheers

Yeah, they make trimpots like that.

You can get LEDs that are lensed bumps with flat leads sticking out the sides. Maybe mount them upside down?

John

AFAIK these are pretty standard. If you browse through your favourite parts supplier catalogue you should find some. I've also seen these in desktop telephone sets.

I know of LEDs made for rear-surface-mounting, with firing forwards through PCB holes roughly 10 mm in diameter.

These LEDs that I have in mind, would be Cecol / Citizen ones of CL-654 series. These are 16-lead SMT packages with 8 LED "chips" / "dice" that are individually accessible, as in able to connect in series or in parallel (rated for usual P-noted CL-65* devices). If parallel of the 8 chips is noted as OK, then 2*4 or 4*2 series-parallel shouild also be OK.

Without overt statement such as from LED datasheet that paralleling LEDs or individual chips of multuichip LEDs is OK, don't bet your house that paralleling LEDs is O)K.

Nothing wrong with making the hole just big enough for the body, so that the LED drops into the hole...

to

until you need to assemble it with a machine, if you look at this datasheet:

-Lasse

Check out Avago HSME-C265 and the whole HSM*-C265 series.

Sure. We use them where there is a carbon-pill switch contact on the opposite side. No one figured out that LEDs are small enough to fit under the keypad, so mounted the LEDs on the opposite side, blocking wiring channels on both sides. I'm in the process of doing it right (gotta fit ten more pounds on the card). ;-)

Sure.

No, it's a normal thing. On DigiKey's product search, look for "Mounting Type" of "Surface Mount, Bottom Entry" or "Surface Mount, Lens Through Board".

OSRAM TopLED RG style. I just bought a bunch of these.

Example DigiKey part #: 475-2777-1

A bit late, but you may try:

Should be available on DigiKey

http://www.electr> > tim wrote:

Those Kingbright LEDs with Z-bend leads are of such dimensions that they project down into the hole of the PC board. If typical 62.5 mil thick boards are used these LEDs are just shy of coming through the board. That makes them perfect for applications where the back side of the board wants to be covered with etched push button switch contact fingers and then overlaid with a laminated plastic over click dome switches or silicon molded keypad. A window under the LED opening makes a very nice indicator positioned near the push switches.

Nice Indeed.