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The DIY projects on this page are
offered for private use only.
Commercial or for-profit use is not authorized except by written agreement.
Copyright(c) Marc F Hult 2007 All Rights Reserved
I have developed a series of circuits and printed circuit boards to address common needs of DIY home automation and environmental instrumentation. Most were developed using EAGLE schematic and board editor from Cadsoft www.cadsoftusa.com. They offer a free version for non-commercial use that can be used for PCB's up to 100 x 80mm (1/2 Euroboard size). This is sufficient for many purposes. I have also developed some larger boards but where practical, have divided them such that they could be worked on in 1/2-Euroboard increments / sizes.
PCB fabrication is available from many sources. One that is convenient for use with euroboards is www.olimex.com. They also provide pre-built project boards for PIC, Basic Stamp. AVR and BASICX microcontrollers that are used by others such as www.PHAnderson.com
4-input Analog
conditioning buffer with 1-wire support
This page describes the most comprehensive of a family of analog input
conditioning boards.
 | Provides buffered input and output for four analog (0-10vdc, user settable), CMOS, and(or) TTL signals |
| Optional gain for each channel can be set separately |
| Optional individual volaage and power regulators for all four channels |
| Optional 12db/octave input noise filter |
| Flexible connectors allow for soldering, screw-mount, RF-45 and(or) connection to mother or daughter boards |
| Optional Parallel connection for Maxim 1-wire devices including four analog-to digital converters, dual counters with memory and temperature. |
| 1-wire counter can be used for pulse-output sensors with wide dynamic range such as the SAMES AC power sensor project described elsewhere on the site and Taos Light-To-Frequency sensors, and to track and monitor discrete events such as from motion detectors |
| Optional pike and over-voltage input protection for analog and 1-wire |
