Category Archives: Test and Measurement

LTC1045 TTL RS-232 Converter

Posted on December 21, 2010 by Rust

A simple way to build a battery-powered RS-232 receiver  circuit is shown on the following schematic diagram. This circuit convert RS232 level to TTL level. Because the 100 KΩ resistor prevents device damage, the input voltage can be driven as much … Continue reading →

Posted in Signal Processing, Test and Measurement | Tagged | Comments Off

FET Hydrophone Pre-Amplifier

Posted on December 20, 2010 by Rust

Unwanted noise is eliminated by FET. FET also added capacitance caused by long cobias connecting hydrophone to shore station. Voltage gain is unity. Hydrophone preamp can be used with cables up to 3000 feet long. Use 1 Meg resistor between … Continue reading →

Posted in Audio and Music, Test and Measurement | Tagged | Comments Off

Peak (Pulse) Voltmeter

Posted on December 14, 2010 by Rend

This is a Peak Voltmeter circuit. This circuit can be viewed as a pulse stretcher, which catch fast pulse signal to be measured by a slow response voltmeter. Even a fast response meter need this circuit since our visual perception … Continue reading →

Posted in Signal Processing, Test and Measurement | Tagged , | Comments Off
« 1 ... 7 8 9 10 11 12 13 14 15 16 17 ... 37 »