Subject:
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Re: Does this offend anyone's sense of lego purity?
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Sat, 2 Feb 2002 04:37:50 GMT
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Viewed:
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491 times
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> i disagree!!
>
> sorry, this is a bit of a sore point. the smallest 78xx series i ever
> found was a 05.
>
> I really wanted a 7803 to try to play with some small pneumatic
> solenoids but none existed. electronsonic has 2 3vdc regulators NONE
> in stock. one was unacceptable and the other required a 1500 piece
> minimum purchase.
Don't you just LOVE Electrosonic? You should have checked out Sayal
Electronics while you were there. (S/E corner of the Victoria Park and
Gordon Baker Rd.) The are also a good source for parts in the area.
You could have just used a 7805 with a 2V zener in series with the
load or three silicon diodes, forward biased (2.1V).
Anyway, Texas Instruments parts, FYI:
Part Output Voltage Output Current Minimum Differential
TL782 2V +/-3% 1.5A 2.5V
TLSCSI285 2.85V +/-1% 620mA 0.6V
TL2217-285 2.85V +/-1.5% 500mA 1V
uA78L02 2.6V +/-10% 100mA 2V
uA78L02A 2.6V +/-5% 100mA 2V
Source: Texas Instruments Linear Circuits, Voltage
Regulators/Supervisors, Comparators, Special Functions, and Building
Blocks [non-Lego] Data Book, Volume 3
Wow! From 1992 - boy am I getting old...
Matthias Jetleb
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