Emergency signal generator

[300EVIL]

I cannot speak highly enough about this gadget when doing RF work with caps and inductors.

http://www.aade.com/lcmeter.htm

Was 99$ for the kit, and the design has been published some place if you like programming PICs.

Steve

I like this idea! Super easy to build too as long as I can get the programming.

[mixedgas]

Looks like a quad square to me! It should work a 50Hz okay.... Right?

USE IT!

ADDING CRUDE COLOR CONTROL: (messy, but works)

See attached.

If you speed up the clock, the lines between the corners will fill in, in that case connect the pin 6 line to the clock signal and get extra blanked spaces to see how fast your different lasers are. It will output CMY, not RGB.

[300EVIL]

Looks like a quad square to me! It should work a 50Hz okay.... Right?

USE IT!

ADDING CRUDE COLOR CONTROL: (messy, but works)

See attached.

If you speed up the clock, the lines between the corners will fill in, in that case connect the pin 6 line to the clock signal and get extra blanked spaces to see how fast your different lasers are. It will output CMY, not RGB.

Ouch! Too bad... I just sliced up my board to make it fit in a project box. I'll have to build this circuit again. That's what I get for not laying it out on a breadboard first. Oh well,,, Next time.

[keeperx]

check it out..
http://www.altex.com/Velleman-Signal...5-P146415.aspx

[mixedgas]

check it out..
http://www.altex.com/Velleman-Signal...5-P146415.aspx

pretty much useless for initial alignment and it gets its sine wave by diode shaping a crude triangle, resulting in a cruddy sine with lumps. Nice try but no sale.

Steve

[keeperx]

ok next..
http://www.electroniccity.com/shoppi...t.asp?prid=525
http://cgi.ebay.com/HP-211A-Square-W...QQcmdZViewItem

[300EVIL]

Little different than the output on the scope but I guess it works....



ILDA compatible too! It opens the shutter and fires all lasers at maximum intensity.

[dave]

What about some sort of quadrature sine wave oscillator?

On a side note, this looks pretty funky

http://images.google.com.au/imgres?i...26tbs%3Disch:1

[The_Doctor]

Steep filters on the square waves? Two 4-pole filters doesn't keep it cheap and simple though especially if you want to adjust frequency...
Maybe if you could make triangle waves in quadrature, that might simplify the filter requirement for sines. Even without filters, triangles in quadrature will draw a nice 'diamond' shape, a 45° tilted square, but with lines drawn steadily and no dwell time at vertices. Might be useful.

[mixedgas]

Steep filters on the square waves? Two 4-pole filters doesn't keep it cheap and simple though especially if you want to adjust frequency...
Maybe if you could make triangle waves in quadrature, that might simplify the filter requirement for sines. Even without filters, triangles in quadrature will draw a nice 'diamond' shape, a 45° tilted square, but with lines drawn steadily and no dwell time at vertices. Might be useful.

Don't need it, see post below. Graeme Pimentel Oscillator... Makes quadrature triangle waves.

Steve