Description
This is a tachometer signal adaptor / converter module. It is useful when the tacho is calibrated for a different number of cylinders or different type of signal. It uses the existing signal as input, and provides a new fully configurable output signal.
Compatible inputs (existing signal):
- DC square wave, 5v or 12v (eg. ignition coil / hall effect sensor / signal from an ECU or ignition module)
- AC sine wave (eg. inductive type sensor)
Available outputs (new signal):
- DC square wave, 50% duty cycle, configurable to 5v or 12v.
- AC coupled output, for tachometers that require an inductive type sensor (AC sine wave signal).
The modules DC output is also capable of switching a small external inductive load, generating a 12v square wave with a high voltage inductive spike on the rising edge (the same as an ignition coil, for older tachometers that require the high voltage spike). A suitable inductor is included, or an automotive relay can be modified for the purpose.
Adjustments:
- Basic Frequency / Speed adjustment is made with a series of 4 switches inside the module.
- Additional +/- 10% frequency adjustment over the basic setting is provided with a trim pot.
- Alternatively, the trim pot can be used to manually set a frequency from roughly 0.1x to 10x the input frequency.
- “Multi-fire filter” option, used when the ignition coil fires multiple times at low RPM (eg. Ford Barra engines).
- Input sensitivity selection
The module uses a plug in connector with 5 wires (power, ground, input, 2 separate outputs).
Small physical size (50x50x20mm) making it easy to mount.
Printed instructions included – which detail installation and adjustment.
- This will not work with current-triggered tachometers as found on some old vehicles.
- It will work with older voltage-triggered tachometers (that only connect to coil negative, not in series with the ignition coil), as long as an inductive load is also used.
Fitting Instructions
Click here for current version PDF download
Click here for previous version hard-wired module (no longer available)
Cam –
Perfect for what I needed, without needing a large Tachometer to work the shift light. Daniel was awesome to deal with when troubleshooting the install, great service & experience!! A++
Andrew Chapman –
Have been trying to calibrate an after market Tacho fitted to a triumph Rocket for months. Been trying everybodys “ideas” for months with no luck. Last week I was put onto Mr MODULE, ordered the Tacho unit last Thursday, it arrived in WA on Monday, fitted to the bike on Tuesday in less than an hour. Works a treat.
Great service and delivery. Great product with clear instructions in real english, not “chinese english”. Overall great service and great product.
Too bad not all companies operate like this.
Thanks & Regards
Andrew Chapman