How to make a Direct Voltage Adapter (DVA) to test CDI ignition

In this video I make up a Direct Voltage (Peak Voltage) Adapter for testing CDI ignition systems. This is a simple circuit that is quick to put together and can save quite a bit of money over making a commercial one.

For a video on using this adapter see: youtu.be/MDbvkFM1V_c

A Direct Voltage Adapter is used to measure the peak voltage coming out of a primary coil and a pulse or trigger coil. This is an important step when diagnosing a problem with an outboard as it can often he hard to tell the quality of the spark you are getting, or where the problem lies if you aren't getting any spark at all. I will be doing a complete follow up video on using this device soon.

The capacitor is a 22uF 400V, R1 is 300 ohms and R2 is 1M ohm.
!!! UPDATE !!! For testing ignition coils R1 needs to be by passed.

Here is the forum thread I used to source the design: forums.iboats.com/forum/engine-repair-and-maint…

Head over to Luc's YouTube channel if you'd like to see loads more electronic wizardry: youtube.com/user/lucsmallau