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Separating ground planes with an impedance
The ferrite bead will block high frequency signals from crossing grounds. With your digital ground you usually have a lot of noise brought on by the clock signal and the flurry...
Tuesday, 3 March 2009 - 21:06
ADC voltage question pertaining to input protection
First off the protection circuit you have is valid and the results you're seeing are proper - no problems with your theory or implementation or analysis. I think the main problem...
Thursday, 22 January 2009 - 15:16
temperature and water level control using fuzzy logic
For basic understanding of fuzzy logic control systems I have found no better book than Fuzzy Control by Passino and Yurkovich: http://www.amazon.com/Fuzzy-Cont... This is a great...
Tuesday, 20 January 2009 - 13:09
solar powered blinking LEDs
First thing I notice is that your capacitor is not a constant voltage source. It will discharge as you draw current from it, lowering the voltage. A simple resistor in series...
Tuesday, 2 December 2008 - 18:28
Minimal Laptop Requirements
I have an old Compaq armada (also known as tank, i dropped it on a brick floor and it kept going...) laptop with a Pentium 2 233MHz, 96MB of RAM. It's running Windows XP and I...
Sunday, 16 November 2008 - 15:39
NiMH rechargeable battery pack
I would think not if the batteries are the same (ie, have similar heat transfer characteristics) and you place the thermistor in a similar location with similar mounting. The...
Monday, 10 November 2008 - 15:36
AVR regulator.. Large Output Ripple.
Oscillation is definitely a symptom of control issues. When you start getting into control systems you have to take into account ADC noise (which limits your useful measurement,...
Wednesday, 5 November 2008 - 18:12
the best unipolar single ended to differential circuit
I'm wondering about the need for a differential signal. Are you worried about transmission noise or only have a differential ADC, or want to use the gain modes? It seems to me...
Wednesday, 5 November 2008 - 17:39
Design power supplies question
All on the same circuit - not a good idea. If your motor is being run with PWM then you'll have a lot of noise on the power lines, and if the grounds for the motor controller and...
Monday, 3 November 2008 - 14:32
Electrical CAD Software
TinyCAD - http://tinycad.sourceforge.net/ It's basic but does everything I want, easy to use, and can generate layout netlists or SPICE netlists. It hasn't been updated in a...
Wednesday, 15 October 2008 - 13:22
Accurate small current sensing
Another possibility is a hall effect sensor. This measures the magnetic field that the current produces when it runs through a wire. I IMAGINE it's possible to get very precise...
Tuesday, 9 September 2008 - 17:01
Serial Port trouble, only get spaces
You also might want to try another terminal program - I've used Realterm forever and it works very well. I know that Hyperterminal only lets you view data in either ASCII or ANSI...
Monday, 14 April 2008 - 14:47

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