Schematic help
Raymond C Drouillard
cosmic.ray at juno.com
Wed Sep 16 05:20:06 GMT 1998
On Mon, 14 Sep 1998 21:37:40 -0500 Joe Boucher <jboucher at ctelcom.net>
writes:
>I've got this schematic I want to put together. Two questions:
>
>1) There are some resistances called out in the format 4k7. Does that
mean
>4.7 k?
I have seen that kind of designation on capaciters. I believe that the
"4" is the mantissa, and the "7" is the multiplier. 40 Meg Ohms seems
really high, though.
>
>B) There are transistors called out as 2n222a. Is that really PN222A?
Can
>PN222A's be used instead of 2N222A?
The 2n2222 is a very common NPN transister. You can get them at Radio
Shack for something like three bucks a ten-pack. I used them in my
senior project to send really short 200 milliamp pulses to an ordinary
LED. Yes, the LED took it just fine.
>
>Good day and thank you for your support.
>
>
>Joe Boucher
>'70 RS/SS Camaro '81 TBI Suburban
>
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