Re: [CAD_CAM_EDM_DRO] electrical help wanted

Old rule of thumb was / is 8,000 uF per amp of current.

And if you are doing the two diode center taped transformer circuit get
two diodes with reverse case polarity so that you can mount them to a
grounded case wall or heat sink.


Hugh


Roland Jollivet wrote:

> Besides the recommended 100V, use about 3000 - 4000uF per 1A of current.
> Cap value too low, and ripple will be high
> Cap value too high, and you could pop the diodes through stress
>
> Since the Gecko amps are fairly tolerant of ripple, you should be ok. No
> need to bother with low ESD caps if you are using 50Hz /60Hz
>
> Regards
> Roland
>
>
> 2008/12/26 Brian Fairey <bfairey@...>
>
>> Designing a PS for Gecko drivers.
>> The transformer gives out 50-0-50 what size capacitor should I use ?
>> ie 50v rating or 100v and the bigger the capacitance the better or what?
>> I remember in the OLD days that one put a capacitor across the output
>> then a resistor inline and another capacitor across the output. I
>> suspect this was great for the ripple effect but perhaps the Gecko
>> dont care.
>> Brian Fairey.
>>
>>
>>
>
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