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Hi All,
My questions:
I was going to get the parts from Maplin, but I can't find 1/2 CD4013
This needs to run on batteries, but the circuit diagram has earth
symbols -
can some explain this to me? please.
Laser keyrings cost about Ł10. A laser on its own costs about Ł25 - any
reason I can't pull one from the keyring?
My Story:
I wish to make a laser device that will "train" a golfer to aim
correctly -
it's a xmas prezzy for my partners father. I must confess, I know very
little about electronics, although I have made a MIDI device for an atari
computer (Etched circuit board and all), but don't ask me how it worked !
Basically it's a box on the floor against the wall that emits a beam to a
putter face (which has a mirror on it). The target is to aim the putter
back at the device - the beam reflection against the wall indicates how
accurate the aim was. The laser will be controlled by a whistle
controlled
flip flop switch. Here's the circuit diagram for a whistle flip flop that
I
plan to use.
http://ourworld.compuserve.com/homepages/Bill_Bowden/page4.htm#whistle.gif
Thanks to anyone that can help
Maplin won't cut them in 2, it's 2 flipflops in one 14-pin package. QX07H isI posted this on electronics.design, but perhaps it's better off here
"Alan Smithee" <paul@eurocomposer.freeserve.co.uk> wrote in message
news:...
Hi All,
My questions:
I was going to get the parts from Maplin, but I can't find 1/2 CD4013
= Battery -ve.This needs to run on batteries, but the circuit diagram has earth
symbols - can some explain this to me? please.
Sorry, is this the battery negative?= Battery -ve.
Does it need to be cut in half? Curiously QX07H is listed in the index, butMaplin won't cut them in 2, it's 2 flipflops in one 14-pin package. QX07H
is
their equivalent HCF4013BEY
Alan Smithee wrote:
I posted this on electronics.design, but perhaps it's better off here
"Alan Smithee" <paul@eurocomposer.freeserve.co.uk> wrote in message
news:...
Hi All,
My questions:
I was going to get the parts from Maplin, but I can't find 1/2 CD4013
Maplin won't cut them in 2, it's 2 flipflops in one 14-pin package. QX07H
is
their equivalent HCF4013BEY
I'd look at http://www.users.zetnet.co.uk/esr/catalogue.html if they carry
all the parts you need, they're much cheaper than Maplin.
This needs to run on batteries, but the circuit diagram has earth
symbols - can some explain this to me? please.
= Battery -ve.
--
Correct address is cpemma at mexbro dot co dot uk
yes= Battery -ve.
Sorry, is this the battery negative?
And some fell on stony ground. Are you American?Maplin won't cut them in 2, it's 2 flipflops in one 14-pin package.
QX07H is their equivalent HCF4013BEY
Does it need to be cut in half?
Not curious, careless. The Maplin paper catalogue has more errors than theCuriously QX07H is listed in the
index, but is not featured on the page it supposed to be on.
Yes. Best to ground all the unused inputs. DatasheetSo,
could I use a 4013BE - each 1/2 CD4013 in the circuit diagram is just
one side of of the CMOS Flip flop?
Alan Smithee wrote:
= Battery -ve.
Sorry, is this the battery negative?
yes
Maplin won't cut them in 2, it's 2 flipflops in one 14-pin package.
QX07H is their equivalent HCF4013BEY
Does it need to be cut in half?
And some fell on stony ground. Are you American?
Curiously QX07H is listed in the
index, but is not featured on the page it supposed to be on.
Not curious, careless. The Maplin paper catalogue has more errors than the
Guardian. It's on the website, 49p, as a 4013B (19p @ ESR) Same thing, but
could come from any maker (CD=Fairchild, HCF=Phillips IIRC)
So,
could I use a 4013BE - each 1/2 CD4013 in the circuit diagram is just
one side of of the CMOS Flip flop?
Yes. Best to ground all the unused inputs. Datasheet
http://www.fairchildsemi.com/ds/CD/CD4013BC.pdf
--
Correct address is cpemma at mexbro dot co dot uk