Reply to "Replacing Batteries with BCRs in MTH PS1 and PS2 Locomotives"

I’ve seen the circuit that uses four 2.5V caps and four 2.7V Zener diodes. I presume the PS1 charging circuit limit’s the charging voltage to a max of 10V in order to prevent overcharging the caps. Just curious, is there some reason why it doesn’t use 2.5V Zener diodes?

I’ve seen your circuit using three 2.7V caps & three 2.7V Zener diodes. That’s a max of 8.1V and works because I presume the PS1 boards run on 5V.

Is there any advantage to using the 4 caps circuit version?

7/30/224:31 AM

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