As mentioned in another Bucket List post,?
"
Not surprisingly, battery Voltage when using dry cells is not stable over time. I jokingly call dry cells a 1/4 cycle AC generator. Compared to a real sine wave plot, the start at the + peak and go down to the zero crossover level, one time.This changing Voltage was investigated, and sure enough, even a small change in applied DCV will alter the HV output and LV -15V output, causing changes in meter readings for a steady input pulse signal."
Enter the AMS1117-3.3 regulator module:
Alone this $1 USD module stabilizes the LENi and at least some other CDC-700, It goes in the line between battery or other DC? power source and the battery negative (hot) wire.? It works best from 3.7V up to over 15V. Changing the input V up and down leaves the CPM Meter, HV etc. stable. Perfect for 18650 conversions.
Caveat: Running these AMS1117-xx way above their regulated Voltage ( say, more that a few V) will cause them to dissipate the
excess energy as heat, limiting their current output. For 12V operation it might be wise to first use the similar 5V regulator module ahead of the 3.3V one.
FYI, a converted ENi with SPeak2Me modules is running around 85mA current.
More to follow
Geo
