G'day Ben,<br><br>I am using stratomaster instruments in my project,<br>if you go to the the following web link, there is a tach in amongst the instruments listed, <br>and requires a "hall effect sensor" to connect to the tach.<br><br>http://www.lightflying.com.au/Stratomaster%20Pages/Smart%20Singles.htm<br><br>I am certain Bernard will assist any way he can.<br><br>Regards,<br>Christopher <br>