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Need Help with Photo Diode / Op Amp Circuit
The gain in this application depends on how you view the diode. Analysis is done by simply noting that in an ideal opamp, zero voltage is between the + and - inputs of the opamp....
Sunday, 29 August 2010 - 16:16
how to clip a number
jayjay1974 wrote:That code returns 0 for any index greater than MAX_INDEX. Oops. My bad.
Sunday, 29 August 2010 - 08:49
Aoyue 853A board pre-heater?
Have you considered the cheap coffee cup warmer? Those can get up to 100degC. If you need a larger board size, what about a hotplate or a skillet set to "low". Forget precision...
Sunday, 29 August 2010 - 06:44
Negative voltage for and LCD's contrast level. How?
The other way would be hooking a low-impedance output oscillator into a charge-pump topology inverter. Something like http://www.csgnetwork.com/ne555c... But watch the ripples.
Sunday, 29 August 2010 - 06:36
Negative voltage for and LCD's contrast level. How?
You cannot generate a negative voltage with just a pot, without a negative rail. Though I have a feeling that might be a typographical error, the contrast pin isn't generally a...
Sunday, 29 August 2010 - 05:02
how to clip a number
Modulo tends to be pretty expensive. Why not simply, after modifying index, index = (index > MAX_INDEX)?0:index; Or like you suggest above, pick an integer power of 2.
Sunday, 29 August 2010 - 03:48
Some Cordial Feedback on AVRFreak [WAS: Something offensive]
Quit yer whining, fire up your editor and port the libraries to straight C or figure out how to work the linker yourself. If you code as fast as you rant, you might even be done...
Sunday, 29 August 2010 - 03:34
I Need help with AVR ISP STK500 USB Programmer
No, because your unknown fuse settings may be expecting a clock signal, and may not have switched its internal inverter on. Supply an external clean clock signal as suggested...
Thursday, 26 August 2010 - 06:14
How would I find/make a connector for such LCD (attached)
That is a FPC cable. Hirose and Molex make the appropriate mating connector, but they need to be soldered on, and are generally in a surface mount connector. You might be able to...
Thursday, 26 August 2010 - 05:59
encoder 3600 pulse & mega
What do you think happens when you turn it really fast, and the interrupt is still servicing the last pulse?
Monday, 23 August 2010 - 08:10
Accelerometer
bobgardner wrote:There just HAS to be a typo around pins 26,27 and 28. You cant have vcc and gnd going to the same label pin. Strangely, that is what the datasheet says. Quote: 26...
Saturday, 21 August 2010 - 12:54
Mac Gerber Viewer
Fink has http://pdb.finkproject.org/pdb/p...
Saturday, 21 August 2010 - 11:42

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