soundcard - Delphijustin industries https://delphijustin.biz Making use out of things! Wed, 29 Oct 2025 20:46:19 +0000 en-US hourly 1 https://wordpress.org/?v=6.2.9 https://delphijustin.biz/wp-content/uploads/2025/10/cropped-dongwa-192-32x32.png soundcard - Delphijustin industries https://delphijustin.biz 32 32 VoltXP Function Generator App https://delphijustin.biz/voltxp-function-generator-app/?utm_source=rss&utm_medium=rss&utm_campaign=voltxp-function-generator-app https://delphijustin.biz/voltxp-function-generator-app/#respond Thu, 25 Sep 2025 00:31:38 +0000 https://delphijustin.biz/?p=5344 This app is a Windows/Linux function generator. It can do sine,sawtooth,square,triangle,noise and sweep. It allows you to use your parallel or serial port as a square wave generator. It also can be configured through the command-line. Has a nag screen when parameters are passed without registering the password. You can click on the black screen …

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]]> This app is a Windows/Linux function generator. It can do sine,sawtooth,square,triangle,noise and sweep. It allows you to use your parallel or serial port as a square wave generator. It also can be configured through the command-line. Has a nag screen when parameters are passed without registering the password. You can click on the black screen for a drop down menu.

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]]> https://delphijustin.biz/voltxp-function-generator-app/feed/ 0 Things you can do with Soundcards https://delphijustin.biz/things-you-can-do-with-soundcards/?utm_source=rss&utm_medium=rss&utm_campaign=things-you-can-do-with-soundcards https://delphijustin.biz/things-you-can-do-with-soundcards/#respond Tue, 03 Mar 2020 20:32:12 +0000 https://delphijustin.biz/?p=1065 There are a couple things a soundcard could come in handy for electricians. Dual channel oscilloscope and RCL meter/ The first circuit shows you a design for oscilloscope: That circuit gives an impedance <500K on CH1 and CH2. R1 and R2 adjust the voltage range. R3 and R4 is for current limiting resistors for the …

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]]> There are a couple things a soundcard could come in handy for electricians. Dual channel oscilloscope and RCL meter/

The first circuit shows you a design for oscilloscope:

Oscilloscope probe schematic

That circuit gives an impedance <500K on CH1 and CH2. R1 and R2 adjust the voltage range. R3 and R4 is for current limiting resistors for the pots and switching diodes. All diodes clip the voltage to a safe level for the soundcard. You can test the circuit by applying a voltage and see if it knocks it down to hundreds of millivolts. One direction of turning should increase the output while the other decreases. And don’t forget to check both polarities!

The RCL meter is simpler and easier. Although the software is shareware its worth a try. I talk to the daqarta team and they said after the trial expires the RCL meter won’t work. You must make resistor R1 removable, so that it can be calibrated.

RCL Meter for Daqarta

Here's a calculator that will give you actual RMS or Peak-To-Peak voltage from the uncalibrated voltage.

Uncalibrated Voltages(Separated by commas):
Actual Voltages(Must be in the same order as the uncalibrated ones):
Voltage to be measured:
Voltage Output:

Software Links

Soundcard Scope Windows

Daqarta Windows

XOScope linux

Soundcard oscilloscope boxSoundcard oscilloscope box

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