Drok-Juntek-on-steroids now PCBs available.

[rin67630]

The PCBs now arrived and i love them: much easier to build than the proto-boards.
https://github.com/rin67630/Drok-Juntek-on-steroids/blob/main/Hardware/ReadMe.md

If If you are interested in getting some of the bare PCBs, send me an eMail to lazlo.lebrun<you know what to insert>gmail.com with your shipping address and the quantity you need.
I would appreciate a participation of 1€ per PCB and the postage cost (2€ for Europe), I'll mail you my (different) PayPal address in return.
P.S. the postage may be higher: I have sent the modules as letters, but the post mentions that goods are not allowed.
Let's see if the mail arrive...
Else, it were cheaper to order 5 PCBs in China, the Gerbers are on GitHub!


Regards.

 

[rin67630]

The PCBs now arrived and i love them: much easier to build than the proto-boards.
https://github.com/rin67630/Drok-Juntek-on-steroids/blob/main/Hardware/ReadMe.md

View attachment 63818If If you are interested in getting some of the bare PCBs, send me an eMail to lazlo.lebrun<you know what to insert>gmail.com with your shipping address and the quantity you need.
I would appreciate a participation of 1€ per PCB and the postage cost (2€ for Europe), I'll mail you my (different) PayPal address in return.

Regards.

The DROK 6012 repurposed as a WiFi connected MPPT - SCC with this technique:

 

[JohnGalt1717]

Do you have efficiency numbers on these?

 

[methods]

If you want to rework a version one for clean readings you need single pole, low pass filters on your ADC inputs.

I don't know offhand if an ESP32 uses 10 bit ADCs, but ALL microcontroller raw ADC inputs will perform poorly without an LPF.

As close to the ADC input as is practical, wire a cap to ground. 1uF will work fine, presuming some sane sample rate.

Cut the previous trace to signal and wire something like a 5K series resistance.

... This will eliminate frequencies above your sampling rate and put you in compliance with Nyquist limit. Think of it as an averaging circuit.

There is no amount of software averaging that you can perform to overcome aliasing. Aliasing does not appear while bench testing, but it certainly appears once noise in the circuit lights up.

Single Pole Low Pass Filter

Consisting of a series resistor and a capacitor to ground... On each ADC... As close to the ADC input as possible.

... Unless the ADC are 8bit (and even if they are) signal integrity issues boil down to the lack of low pass filtering. It is a requirement, not suggested best practice.

-methods