EEVblog #573 - Mailbag

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Mailbag Monday
NXP SMD Package Cheats:
HP 41 Calculator upgrade PCB

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That EEVblog sign was beautifully made. A+

electronicsNmore

Send all future packages to:

Dave Johns,
That Crazy Austrian Guy

3-)

xjet

Dave, try backlighting it with an EL-panel! :)

Glad you like the sign.

FrankSandqvist

For that sign, put LEDs along the outside of the sign so they shine through the clear acrylic layer behind the aluminum, should shine up the letters nicely without any spots!

sctte-

I love these mail bag segments. It shows how large and enthusiastic the EEVBlog community is.

gamccoy

28:10 My suggestion on 'backlighting' the sign: "side-light it" with bright LEDS on each side with the light filling up the background

dhpbear

SMD LED strip on the top should light that sucker up really well and because it's a side method of lighting it the light won't punch through the Blog letters that much.

aserta

Dave: lighting up the sign, hit the light around the edges with led strip lights, then it should make its way out of the edges of the letters.

frollard

A whole 48 minutes! Way to go. Thumbs up. Thanks

DavidLeeMenefee

Dave, my first HP calculator was the 41CV and was bought in 1985 (I wanted an HP15C, but they had stopped making them, I think this was a better one!). I also had the math pack as well as an engineering pack and memory pack. Absolutely loved my 41CV. Its demise was the fact that it used N-Cells and those batteries were notoriously hard to find, and were very expensive compared to stanard AA or AAA batteries. My Keyboard finally died on it in 2001 and I replaced it with an HP48GX (which I still use today).

WreckDiver

Having a rough day... seeing this in the sub box just made it a whole lot better. Much love from 'Murica (U-S-A, U-S-A!)

ClosetYeti

For backlighting your sign, use some of the diffuser board from the backlight of one of those extra LCD monitors that you seem to have too many of...

icesoft

Why are you not able to easily get an analog video signal Dave, you have an analog transmitter in the corner ;-)

TheChipmunk

About the HP41. All I know about their serials is that the first two digits is the manufacturing year, in number of years since 1960. This one 1988

AsbjornGrandt