Javelin Multimeter
jmerc
Posts: 3
Im designing a multimeter using the javelin stamp. The multimeter is supposed to measure AC & DC Current and Voltages. Also it has to measure resistance and capacitance. I am using the stamp.core package as seen in the manual but I am having problems.
Resistance and Capacitance:
I am using the rcTime in the example. If I measure the resistance I will have the value of the capacitor·constant and if I measure capacitance I will leave the value of the resistor constant. Chapter 9 of the manual explains that it takes·800 units to calculate the time and·for the capacitor to charge or discharge it takes 4 time constants. Is the·value given·by this example in units or already in sec??
Analog to Digital Converter:
For this application should I used an ADC chip and control it with the microcontroller as in Application 6 of the microcontroller or use·the circuit in the example.
Currents:
How can I implement this·measurement using the javelin??
Current and Voltages:
How can I make this measurements be auto ranging??
Any suggestions!
Resistance and Capacitance:
I am using the rcTime in the example. If I measure the resistance I will have the value of the capacitor·constant and if I measure capacitance I will leave the value of the resistor constant. Chapter 9 of the manual explains that it takes·800 units to calculate the time and·for the capacitor to charge or discharge it takes 4 time constants. Is the·value given·by this example in units or already in sec??
Analog to Digital Converter:
For this application should I used an ADC chip and control it with the microcontroller as in Application 6 of the microcontroller or use·the circuit in the example.
Currents:
How can I implement this·measurement using the javelin??
Current and Voltages:
How can I make this measurements be auto ranging??
Any suggestions!
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