Notes, comments and opinions about electronics

S-Curve Trajectory Calculation

Part I There are many sources on the web discussing s-curve trajectories, and how they help to smooth the response of motion control applications. I have recently developed a motion controller based on a...

Solder Mask Protects SMT Components ...

Our company manufactures a number of printed circuit board products that have  through-hole components mounted from the top of the PCB and SMT components mounted on the bottom. This arrangement,...

ICOP EBOX-3300 and EBOX-3310 Mountin...

I am again building some industrial controllers based on an eBox-3310 computer, and again, I have had trouble mounting the Disk On Memory (DOM) disk when CE boots. Read about my earlier struggles here:...

Wheatstone Bridge Zero Balancing Cal...

This document presents an equation that I developed for calculating the differential voltage of a Wheatstone bridge having two zero balancing components: a balancing potentiometer and a balancing resistor: the...

Free Mach3 Breakout Board!

Field Testing Required   I have developed a Mach3 plug-in for a USB I/O breakout board and require it to be field tested. I will provide the module for free and only require that the field tester pay for...

Somfy Roller Drives. What’s In...

What’s inside a Somfy ST30 roller drive? A customer contacted me last week with a simple problem. Their company builds custom shades for the residential window treatment market, and they were buying...

Servo Triangular Trajectory Calculat...

Triangular Speed Trajectory Calculation and Testing The following is the general form of a trapezoidal speed trajectory used in positioning systems. As such, calculating the acceleration, deceleration, and...

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