Diode D5? One or two shunts?

[BluePygmyOwl]

Hi Danny,
Big comliments on this. It looks really nice, and I thought I might give it a try to build this myself.

When I looked at the schematic, I had some questions.

• When a charger is plugged in, Chargedetect is pulled low. The voltage difference between charger and battery will turn on the optocoupler D2. First I thought D5 was some Zener Voltage Regulator diode, but then I saw that it isn't a zener. Why is D5 there then?

• Also, in the schematic you have R11 and R64 as shunt resistors (1mOhm), but on the pictures I only see one shunt placed on your boards. R11 is rated for 5W. Isn't that short when using proper discharge loads (electric board)? If R64 is added, does this imply a software setting that has to be changed?
  

Thanks in advance

[DieBieEngineering]

The two shunts are there to allow for different component population options ( to experiment ). In the Altium project you can select population variants, with every variant I made the I always have only the top shunt mounted.

I can totally imagine how strange it looks! Some LEDs can handle only a limited voltage in the reverse direction, this diode prevents that voltage to be created. This circuit also changes in a evaluation branch ( HW V0.10 ), there I also implement a P fet as ideal input diode.

[BluePygmyOwl]

Hi Danny,
Thanks. Should I wait with my build for V0.10? Or does that take some significant time before you can publish? I am kind of amped to start to build this, but I do like the idea of the ideal input diode. Will you use a comparator instead of the opto for ChargeDetect?

[DieBieEngineering]

It is already in GitHub on a branch, I will look it up and let you know. It is also tested and works!

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On Mon, Mar 18, 2019, 13:14 BluePygmyOwl ***@***.***> wrote: Hi Danny, Thanks. Should I wait with my build for V0.10? Or does that take some significant time before you can publish? I am kind of amped to start to build this, but I do like the idea of the ideal input diode. Will you use a comparator instead of the opto for ChargeDetect? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#11 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AKH-ngy_0Xos_t2sIscBGNs931TOk7DPks5vX_O8gaJpZM4b4YfY> .