I thought you guys might enjoy the pix that I took after cutting apart a 34 year old pnp power transistor:
http://www.muzique.com/news/pnp-power-transistor-closeup/ (http://www.muzique.com/news/pnp-power-transistor-closeup/)
(http://www.muzique.com/news/images2/pnp58.jpg)
The transistor still works and the hFE is in spec.
Enjoy!
regards, Jack
Nice, I always wanted to do this..., ahh the dark side is calling, where's my dremel
When I was a kid I took apart the caps of at least a dozen 2N3055's, for the desperation of my father (the owner :P).
These things are very good (and expensive) phototransistors.
By the way, I've seen lots of projects (envelope followers & the like) with LDRs, but not with phototransistors. Why?
Quote from: amz-fx on November 27, 2014, 03:15:54 AM
I thought you guys might enjoy the pix that I took after cutting apart a 34 year old pnp power transistor:
The transistor still works and the hFE is in spec.
How much does the hfe changes with light?
Update: I measured the wires connecting the chip to the pins and they are 0.010" which makes them 30 gauge.
Does this make you reconsider the impact of interconnect cables? :icon_rolleyes:
regards, Jack
Put it under the sun and it will provide few millivolts....
find 100.000 more, and enjoy your first DIY solar panel :icon_mrgreen:
Quote from: Fender3D on December 06, 2014, 09:54:39 AM
Put it under the sun and it will provide few millivolts....
find 100.000 more, and enjoy your first DIY solar panel :icon_mrgreen:
Make sure you match them all.... :icon_mrgreen:
Wire bonding by hand is one of the things I do for a living, except the wire is .0007" and those pads are giant comparatively speaking.
(http://scontent.xx.fbcdn.net/hphotos-xap1/v/t1.0-9/10436018_10203637413631984_1529255250688211481_n.jpg?oh=b009175ed46486ee8cd297ecae9c366a&oe=55A19B6E)
man you must have steady hands for that... :icon_eek:
(or do a lot of valium) ;D