Hello, I just joined this forum and I need some advice or info. on inputing external signals to my PC sound card at the microphone jack.
I downloaded software that makes it possible to use my PC as an oscilloscope. The PC sound card is used to input sounds and other data, and the voltage pulses can be viewed on the PC oscilloscope. It takes sounds from a microphone and displays the sound frequencies as voltage pulses.
The microphone input can also be used to input other signals from external electronic circuitry - BUT there is a need to be careful not to input voltages that are too high. The software developer states that the input line voltages need to be 0.7volts or less, and a seperate circuit should be used to attenuate the inputs.
I have a Realtek HD audio input in my PC, and I guess that is the sound card. Can anyone tell me what are the required (safe) input voltages to that type of sound card at the microphone input? The mic. input is a 1/8" jack on the front (or rear) of the PC.
Thank you
potoole
I downloaded software that makes it possible to use my PC as an oscilloscope. The PC sound card is used to input sounds and other data, and the voltage pulses can be viewed on the PC oscilloscope. It takes sounds from a microphone and displays the sound frequencies as voltage pulses.
The microphone input can also be used to input other signals from external electronic circuitry - BUT there is a need to be careful not to input voltages that are too high. The software developer states that the input line voltages need to be 0.7volts or less, and a seperate circuit should be used to attenuate the inputs.
I have a Realtek HD audio input in my PC, and I guess that is the sound card. Can anyone tell me what are the required (safe) input voltages to that type of sound card at the microphone input? The mic. input is a 1/8" jack on the front (or rear) of the PC.
Thank you
potoole