On Mar 23, 12:34 pm, John Fields
wrote:
> On 23 Mar 2007 07:28:04 -0700, kielvereec...@gmail.com wrote:
>
>
>
> >On Mar 23, 6:43 am, John Fields wrote:
> >> On 22 Mar 2007 17:02:58 -0700, kielvereec...@gmail.com wrote:
>
> >> >Okay... I think I found the circuit I am going to try to assemble... I
> >> >am confident that I can do it:
>
> >> >http://www.tkk.fi/Misc/Electronics/circuits/strobocontrol.html
>
> >> ---
> >> Hmmm... What's wrong with the circuit I gave you?
>
> >> --
> >> JF
>
> >You're right, that one would give the correct frequency... A few
> >questions: What is happening on the far right with the IRL3303, what
> >is with the 2 wires that go right through? And is the fifth pin on the
> >555 not being used?
>
> ---
> I've re posted the schematic below, with a correction: the IRL3303
> is an "N" channel enhancement-mode MOSFET used to drive the solenoid
> and it has a drain, a gate, and a source, not a collector, base, and
> emitter as shown earlier. I don't know what you mean by the two
> wires that go right through, since one end of the solenoid coil and
> the anode of the diode are connected to the drain, pin 3 of the 555
> is connected to the gate, and the source is grounded. Pin 5 is for
> voltage control of the output frequency/period, and may be left
> floating in your application. =20
>
> .+12>--+--------------------------+--------------------+
> . | | |
> . | | +-------+
> . [1000] +---------+ | |K |
> . | 7|_ |8 | [DIODE] [COIL]
> . +------------O|D Vcc|--+ | |
> . | 6| _|4 | +-------+
> . [82K] +-----+--|TH R|O-+ IRL3303 |
> . | | | 2|__ |3 | \ D
> . +->[500K] +-O|TR OUT|--|-------------+----G =20
> . | | | GND | | |K S =20
> . +----+ +----+----+ +------+ | |
> . | 1| 555 |+ | [1N4744] |
> . [0.68=B5F] | [10=B5F][100nF] | |
> . | | | | | |
> .GND>-------+-------------+-------+------+------+------+
>
> --
> JF
Thanks John... I am going to the local electronics store right now to
see if they have all the parts...
Do you know of any good online electronic (non-wholesale) distributors
that I could use that would ship to Canada?
-KV
|