Smiths Tachometer RVI Buffer -542-

Out of stock

An external module to convert a voltage signal to current pulses suitable for the RVI tachometers.

73mm fixing centres

download installation instructions RVI Buffer.pdf (386kb)


External Module Converts Voltage to Current to drive RVI tachometers

If your classic car has had electronic ignition fitted, the tacho is misbehaving but otherwise is in good condition, or you don't want to upgrade the internals, this will solve the problem.

The module is voltage driven and can be driven from electronic ignition or from the coil -ve

The module outputs current pulses suitable to drive an RVI tachometer.

Less than 1W at peak rpm.

Five conections (by internal screw terminal block)



Signal in

Tachometer trigger coil 1

Tachometer trigger coil 2

The module is designed to work on negative earth and has not been tested on positive earth tachometers.

Note, for long term reliability we recommend a full conversion to voltage triggering for old tachometers as it replaces the old electronics. This kit utilises the original electronics in the current driven tachometers which in most cases will be ( for electronics) quite old having spent most of its life in a hostile environment.




More information

Tachometer Wiring


Note, 1

to cover as many tacho inputs as possible there are two options for signal input voltage

to clarify how these are used depending on your set-up

if you have a tacho output. from an ECU or ignition module, the low voltage input should be used.
if you are connecting to the -ve of the coil, select the high voltage input 
Write Your Own Review
You're reviewing:Smiths Tachometer RVI Buffer -542-
Copyright © 2016-present Spiyda Ltd. Reg. England and Wales No. 10511733 All rights reserved