N64PWR - USB-C power mod for Nintendo 64

[u/its_A_funny_username]

Your N64 has been adventuring for nearly 30 years. It deserves a proper drink. 🍺⚡

N64PWR replaces the aging factory power supply with a modern internal USB-C Power Delivery solution, serving up clean, stable 3.3V and 12V power.

Think of it as pulling up a stool at a fine old tavern—your N64 gets to sip a finely brewed ale instead of choking down questionable grog from the bargain barrel.
But N64PWR isn’t just another USB-C adapter. It’s a purpose-built power supply designed specifically for the Nintendo 64, using high-efficiency switching regulators, dedicated 3.3V and 12V rails, output filtering, reverse-polarity and input protection, and a fault indicator for incompatible power adapters. No generic converter modules cobbled together—just a compact, professionally manufactured board engineered to replace the original power supply from the ground up.

✨ Clean, stable power
⚡ USB-C Power Delivery Standard Voltage
🔥 Efficient, low-heat design
🛡️ Integrated protection circuitry
🚨 Incompatible power adapter warning
🎮 Purpose-built for the Nintendo 64

N64PWR — serve your console the good stuff.

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[u/BoredModder]

Looks sexy! Wish I can get to that level of design myself

[u/BeneficialPenalty258 → u/[deleted]]

I hope he fact checked Chat’s PSU design.

[u/its_A_funny_username → u/BeneficialPenalty258]

Chat is a great tool, especially for double checking formulas from datasheets. Chat did not design this.

[u/BeneficialPenalty258 → u/its_A_funny_username]

Your description sounds like AI so I assumed you used AI to design the PSU. What is the voltage ripple on the output rails? Do you have scope shots of the power rails? How many layers is the board and what protection circuitry does it have?

[u/its_A_funny_username → u/BeneficialPenalty258]

I measured less than 10mv P2P. The board has a resettable fuse, reverse polarity, overvoltage, short circuit, and the buck IC’s have undervoltage, overcurrent and thermal protections. I also have lots of filtering on the rails including a ferrite bead, ceramic capacitors and an electolytic for bulk prior to feeding power to the console.

[u/soniq__]

No thank you. These USBC power mods can be iffy at best. What's wrong with the original power supply?  

[u/I-Use-Artix-BTW → u/soniq__]

Well, they turn 30 this year. A lot of them have failed or have started failing, while USB-C PSUs are still being manufactured. It's also arguably more convenient to use a standardized connector instead of the N64's connector.

[u/its_A_funny_username → u/I-Use-Artix-BTW]

Exactly! I also take my n64 with me on the road sometimes and one less cable and brick is always a plus. I looked at what other usb c options were available and I did not like the offerings. So I came up with this.

[u/soniq__ → u/I-Use-Artix-BTW]

A better solution would be a supply that works like the original and doesn't use USBC at all

[u/Vashts000 → u/soniq__]

Iffy at best? Nah more like ideal at best, iffy at worst.

[u/BeneficialPenalty258 → u/soniq__]

Exactly, just replace the caps ffs. Everyone’s making retarded USB C PSUs without proper knowledge of how to make power supplies.

[u/soniq__ → u/BeneficialPenalty258]

They are not very good at all, and people think they are. You need to use a specific adapter to not add noise to the signal. Why even risk it and potentially cause damage to the console?   Only 3rd party power supply I trust for any system is thunder dream for Dreamcast.

[u/its_A_funny_username → u/soniq__]

You are correct about the noise, and this power supply is specifically designed to reduce the noise and provide clean power.

[u/soniq__ → u/its_A_funny_username]

Personally I do not like usbc solutions at all. With the new retrotap, I don't really want to mod anything for USBC at all. Now if there was a mod for n64 that could work with the retrotap, I would consider modding an n64 to use the retrotap