Beachmaster Digital

[jeep6789]

Hello! I want to make a wireless detector with Bluetooth and single-chip mechanism, because the op amp is required to ? 5V level, single-chip microcomputer and Bluetooth 3.3V, then in this circuit, how should I generate ? 5V and 3.3V?

[jeep6789]

I need to get the level of level A, please help，Thankyou

[Olly]

I need to get the level of level A, please help，Thankyou

I would suggest downloading and using LTSpice for some circuit simulation. That way you can get a reasonable idea of what the analogue section of your circuit is doing.

Regards

[Olly]

Hello! I want to make a wireless detector with Bluetooth and single-chip mechanism, because the op amp is required to ? 5V level, single-chip microcomputer and Bluetooth 3.3V, then in this circuit, how should I generate ? 5V and 3.3V?[ATTACH]57089[/ATTACH]

Perhaps these queries should be in a thread of their own?

[MartinB]

Hello! I want to make a wireless detector with Bluetooth and single-chip mechanism, because the op amp is required to ? 5V level, single-chip microcomputer and Bluetooth 3.3V, then in this circuit, how should I generate ? 5V and 3.3V?[ATTACH]57089[/ATTACH]

Hi jeep6789,
You just need to extend your main board or build a small board with regulators that will give you power in; +12v, -12v, 5v and 3.3v out.

[jeep6789]

Regarding the amplification of the premium, why no one is differential amplification? Differential enlargement can resist interference

[Carl-NC]

Beachmaster (and any mono-polar PI design) has single-ended sensor so a differential amp won't help. However, we can take a late sample and subtract it to suppress interference. This is another form of differential amplification.

[jeep6789]

What is a bipolar PI

[Carl-NC]

Search the forum for "bipolar PI". Include the quotes.

[jeep6789]

What's the holdup? Did the project fail

[Olly]

What's the holdup? Did the project fail

Gee, you sound just like my old boss!

This is a hobby project which I’m pursuing at my own pace so you’re just going to have to be patient I’m afraid.
They say that all good things come to those that wait ��

[jeep6789]

Because everyone is waiting for your news, I hope you must succeed, refuel

[Qiaozhi]

Gee, you sound just like my old boss!

Haha! I was thinking the same thing.

[jeep6789]

Is Mur860 to reverse, should it be placed between the S pole and -12?

[Olly]

Is Mur860 to reverse, should it be placed between the S pole and -12?

No, it's correct where it is, its purpose is to decouple the Mosfet Coss from the coil and facilitate a faster flyback falling slope.
The MUR460S would probably be a slightly better choice as it's max reverse recovery time is a bit quicker but the 860J seems easier to find in SMD.