Category Archives: “My designs”

These are my designs, either from scratch or I have modified someone elses design and made my own layout

LM317 compatible TPS7A4700 regulator

I got the boards from oshpark today. They look quite nice, I only have bad cellphone pics…but here they are. /Mayday Advertisements

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LM337 alternative using TPS7A3301

I threw this layout together quickly, maybe too quickly, as it needs to be mounted with the back of the PCB facing “forward” to match the pinout of the LM337. No big deal though, not for me anyway. GND pin … Continue reading

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TPS7A4700 regulator with LM317 pinout

I sent files for these some time ago, but I think I forgot to post about them on here. Anyway, here are some renderings from KiCad. As you can see by the size, it won’t fit in all spots that … Continue reading

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USB DAC & HeadAmp.

Well, it’s almost done 🙂 The wiring needs tidying up, I will put an LED on the front. But it has passed the smoke-test, DC-offset is barely measureable (apart from a seconds rise to above 200mVdc at power on/off). Linux … Continue reading

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Headamp

Slowly getting there… Resistors are thin film 0.1%. 0805 caps are 220pF Panasonic PPS /Mayday

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“My” AD797 & BUF634 headamp/preamp

I got the boards yesterday. This time I used elecrow. For the first time they dissapointed, the silkscreen on 3 of 5 PCB’s was awful. The two OK ones are these: I actually populated it with a few parts this … Continue reading

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