Check the Schematic Atmega328P with LoRa

sorry , that is the schematic

Mia schrieb:
> Is my design correct ? will my Schematic working well ?

There ist no complete schematic.
So how can we check?

Do you realy need the 16MHz?
If 8MHz are OK you can remove the hole boost Part and you dont need 
Signal conversion between LoRa Module and uC.
By the way...where ist this done?

Edit:New schematic is added

N. M. schrieb:

> There ist no complete schematic.
> So how can we check?
I add it now here

> Do you realy need the 16MHz?
> If 8MHz are OK you can remove the hole boost Part and you dont need
i need 16MHZ

> Signal conversion between LoRa Module and uC.
> By the way...where ist this done?

i will connect it with cabel

> Edit:New schematic is added

Mia H. schrieb:
>> Signal conversion between LoRa Module and uC.
>> By the way...where ist this done?
>
> i will connect it with cabel

And a cable makes signal conversion?

RA-02 makes signal conversion and ready to connect directrly with 
Arduino( Atmega328p)

N. M. schrieb:
> Mia H. schrieb:
>>> Signal conversion between LoRa Module and uC.
>>> By the way...where ist this done?
>>
>> i will connect it with cabel
>
> And a cable makes signal conversion?

RA-02 makes signal conversion and ready to connect directrly with
Arduino( Atmega328p)

N. M. schrieb:
> Mia schrieb:
>> Is my design correct ? will my Schematic working well ?
>
> There ist no complete schematic.
> So how can we check?
>
> Do you realy need the 16MHz?
> If 8MHz are OK you can remove the hole boost Part and you dont need
> Signal conversion between LoRa Module and uC.
> By the way...where ist this done?
>
> Edit:New schematic is added


Do you mean like that ?

i make new schematic with 3.3 V

Mia H. schrieb:
> RA-02 makes signal conversion and ready to connect directrly with
> Arduino( Atmega328p)

Nope.
Not with 5V Atmega (see Attachment).

N. M. schrieb:
> Mia H. schrieb:
>> RA-02 makes signal conversion and ready to connect directrly with
>> Arduino( Atmega328p)
>
> Nope.
> Not with 5V Atmega (see Attachment).

Do you mean like that ?

i make new schematic with 3.3 V

Mia H. schrieb:
> Do you mean like that ?

Yes, if 16MHz are not needed.

With this Change you dont need the Boost, no Signal Conversion between 
LoRa and uC and it is also better for battery mode because of lower 
power consumption.

N. M. schrieb:
> Mia H. schrieb:
>> Do you mean like that ?
>
> Yes, if 16MHz are not needed.
>
> With this Change you dont need the Boost, no Signal Conversion between
> LoRa and uC and it is also better for battery mode because of lower
> power consumption.

thank you ,

will my logic with OR-Gate and BJT  working to start up the circuit?

with 3.3 on reset

Your power supply isnt valid with the last changes.
V3 of CH340 needs input voltage in 3V3 Mode. It is no output.
So you have to generate 3V3 from your USB or the battery (see attachment 
CH340 or datasheet).
If you need an integrated 3V3 regulator, take a look at the FT232.

Mia H. schrieb:
> will my logic with OR-Gate and BJT  working to start up the circuit?

I dont think so. It is not very common to switch GND. I would recommend 
you to switch supply voltage 3V3 with a highside FET.
Also I would recommend you to put In_A and In_B to a static potential 
with a pulldown resistor. Because if the pins are floating there will 
happen some magic at the output of the OR-Gate. Perhaps it is also good 
to put some C there for better EMI behaveiour.

N. M. schrieb:
> If you need an integrated 3V3 regulator, take a look at the FT232.

Ok, the FT232 can only deliver 50mA @ 3V3. So you need an external 
regulator.

N. M. schrieb:
> N. M. schrieb:
>> If you need an integrated 3V3 regulator, take a look at the FT232.
>
> Ok, the FT232 can only deliver 50mA @ 3V3. So you need an external
> regulator.

can you give me example ? wich Fet can i use with Logic to startup my 
circuit ?

I edit it now

I think something like in the attachment. Cant give you a good example 
(I am in the train at the moment).

I dont know if you realy need the 300mA...Common types in China Boards 
are AMS1117 or MCP1825 or ...

For highside switch take a look into the Forum. There are so many 
recommendations. 300mA is not so much for an FET. So a small one SOT23 
will do ist.

I would spend a crystal, even for 8MHz because the internal oscillator 
may not be very accurate.

N. M. schrieb:
> I think something like in the attachment. Cant give you a good example
> (I am in the train at the moment).
>
> I dont know if you realy need the 300mA...Common types in China Boards
> are AMS1117 or MCP1825 or ...
>
> For highside switch take a look into the Forum. There are so many
> recommendations. 300mA is not so much for an FET. So a small one SOT23
> will do ist.

which P-Fet can working with 3V without drop-down the voltage ?

RA-02 makes signal conversion and ready to connect directrly with

I would spend a crystal, even for 8MHz because the internal oscillator
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