Search found 3 matches

by mihai.albert
Sat Mar 10, 2018 8:53 pm
Forum: Pre-Sales Advice
Topic: Speedometer Setup
Replies: 5
Views: 2658

Re: Speedometer Setup

Thank you again for the details, Gerry. I've went ahead and ordered the THS7002EVM. One thing I've noticed however is that its input impedance is 50 ohms (regardless of the 2 channels being used, there's a 50 ohm resistor connected to the ground for each), while the function generator modules of the...
by mihai.albert
Tue Feb 27, 2018 9:47 pm
Forum: Pre-Sales Advice
Topic: Speedometer Setup
Replies: 5
Views: 2658

Re: Speedometer Setup

Thank you for the detailed reply, Gerry. To begin with - one of the “generator”’s (Phidget 1018) digital output is controlled by my code running on the PC. At specific time intervals the code either sets the output level to off (0V) or to on (5V). So as you said the pulse width is determined coarsel...
by mihai.albert
Sun Feb 25, 2018 9:24 pm
Forum: Pre-Sales Advice
Topic: Speedometer Setup
Replies: 5
Views: 2658

Speedometer Setup

Hi, I’m trying to determine the precision of a model railroad speedometer – the one here – in effect a device that measures revolution speed of the locomotive wheel and sends this across as a number to the PC constantly. By doing some analysis, this speedometer is composed of a rotary encoder that s...