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GB for Simple Cap-Mx Regulated Low-Noise PSU
GB for Simple Cap-Mx Regulated Low-Noise PSU
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Old 14th July 2019, 06:39 PM   #101
jimk04 is offline jimk04  United Kingdom
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Old 15th July 2019, 07:26 PM   #102
maartn is offline maartn  Netherlands
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Quote:
Originally Posted by xrk971 View Post
What regulator are you using because doesn’t an RPI take more than 1A at 5v?

For this one I used LM780CT. According to spec the Pi 3b draws 1 amp. The datasheet of the regulator says it can go up to 1.5. When I fed both the Pi and the Isolator hat (200 mA max) from the same PSU, I heard the odd stutter, indicating power shortage. But when feeding only the Pi, it works fine and sounds great. So with this reg, the little PSU seems just fit for a Pi.

I also mean to build one with LM340AT, which is a slightly narrower spec’d version of 780.
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Old 20th July 2019, 04:04 PM   #103
jimk04 is offline jimk04  United Kingdom
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Finally. Built one up....well nearly. Waiting for some Ebay lt1963 3 pin regs.

I had to mount the film caps near the L under the board as the inductor is a bit big.
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Old 31st July 2019, 01:42 PM   #104
jimk04 is offline jimk04  United Kingdom
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So both of then finished with the Ebay LT1963 set at 5v.
Both are 5.00v. Maybe I could have done with 5.2v for some headroom, I may look at altering the R values but they are tiny.

I made an error on the first build and had 1000uf instead of 2200, so that is remedied. Only had 1 220uf Pana FC for some reason so one has an Elna Silmic 2 in there.

Look forward to rigging them up to some gear!
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Old 31st July 2019, 02:56 PM   #105
xrk971 is online now xrk971  United States
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GB for Simple Cap-Mx Regulated Low-Noise PSU
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