Posts
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Reverse Engineering the Ohaus Scout SPX Serial Interface
The Ohaus Scout SPX is a portable electronic balance that has a peripheral interface connector. This connection supports many different proprietary peripherals such as printers, displays, ethernet, Bluetooth, and so on. Each of these peripherals use this same 6-position mini DIN connector. This article will discuss how this interface works and how to enable the serial port capability for just a few dollars worth of materials. -
Linear Voltage Regulators
In this article we explore some high level concept of a series topology linear voltage regulator with some SPICE simulations and mathematical analysis. -
Decibels - Fundamentals and the Time Domain
In this article we explore the fundamentals of the Decibel units and how to derive them using only power and resistance. We then provide an example of how these calculations appear in the time domain such as on an oscilloscope. -
Clamp Connect: Free your Fluke devices!
The Fluke 376FC is a Bluetooth wireless AC/DC clamp meter which communicates over the BLE protocol using a proprietary mobile application interface. As of writing this article there is no known desktop application or API for interfacing to this unit. Therefore the goal is to produce a working interface which connects to the unit and allows a user to interface to the device remotely from a PC. -
Coto Relay Multiplexer
In this article we discuss the design of a Form-A reed relay based multiplexer for test and measurement applications. -
Digital Isolators
In this article we discuss the design and development of a high reliability, high density digital signal isolator with parasitic powered inputs. -
RTD Simulation
In this article we discuss the development of a static resistance simulator for use in functional testing. -
Resistor Tolerances and Statistical Distribution Thereof
In this article we discuss the statistical distribution of 1% metal film and 5% carbon film resistors. -
Modeling a Wound Toroid in Solidworks
In this article we discuss the modeling of a wound toroid using Solidworks. This method uses surfaces and is a very fast method of creating a helical path around a curve. This method could also be used for generating complex wrapped helix shapes around objects, too. -
Atmel SAMD51 20x4 LCD Driver
In this article we share the source code and details on a 20x4 LCD driver with a hardware abstraction layer to allow for ease of migration to other microcontroller platforms. -
Automated Continuity Test System
In this article we discuss using the Qt5 framework to create a test automation application to assist with testing of devices where hands free recording may be useful. -
Mathematical Reference
In this article we discuss some useful mathematical formulas in a quick reference format and some helpful heuristics to solve problems. -
Better Breakout Boards
How to make better breakout boards by standardizing your designs. -
Reactor Control System
The reactor control system (RCS) is a fully automated control system targeted at the micro-reactors market for development and research of catalytic materials. It provides a low-cost entry for automation of pilot scale and laboratory research and development systems while offering extensive data logging capability and critical safety features including sequenced shutdown protocols as well as configurable warning, fault, and critical limits. -
USB Thermocouple under 16KB on an Atmel SAMD11
In this article we discuss the basics of thermocouples, software USB stack setup using the Atmel API without using an external oscillator, and tips for shrinking MCU code on a constrained system. -
Measuring Lorentz Force
In this article we discuss measuring the force created by a current carrying conductor in a magnetic field.
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