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Low cost logic analyzer probe for Rigol MSO5000 EasyEDA project
Gandalf_Sr:
--- Quote from: S. Petrukhin on September 01, 2020, 11:34:25 am ---
--- Quote from: Gandalf_Sr on September 01, 2020, 12:27:34 am ---You're welcome.
--- End quote ---
I started making an amplifier for built-in generators. The amplitude of 2.5V is very small, I think to make the gain by 2 or 10.
I sometimes need to emulate the sensor signal in industrial 24V equipment.
--- End quote ---
It's already been done for the MSO5000, on the threads here somewhere.
[EDIT] Here it is https://www.eevblog.com/forum/projects/function-generator-booster-for-mso5000/msg2958594/#msg2958594
S. Petrukhin:
--- Quote from: Gandalf_Sr on September 01, 2020, 01:23:33 pm ---
--- Quote from: S. Petrukhin on September 01, 2020, 11:34:25 am ---
--- Quote from: Gandalf_Sr on September 01, 2020, 12:27:34 am ---You're welcome.
--- End quote ---
I started making an amplifier for built-in generators. The amplitude of 2.5V is very small, I think to make the gain by 2 or 10.
I sometimes need to emulate the sensor signal in industrial 24V equipment.
--- End quote ---
It's already been done for the MSO5000, on the threads here somewhere.
[EDIT] Here it is https://www.eevblog.com/forum/projects/function-generator-booster-for-mso5000/msg2958594/#msg2958594
--- End quote ---
Unfortunately, I didn't see it. My idea is to make a board/adapter that simultaneously fits into both the sockets of the built-in generator and the USB connector nearby. You can take power from USB for this device.
Gandalf_Sr:
I too thought about designing a PCB that plugged into the USB & the 2 BNC connectors but, if you want to use the USB port for more than 1 thing e.g. mouse, USB drive, power for your voltage doubler, your approach will be problematic. I use SMA connectors so I think a better idea is to build a single PCB that has 2 SMA inputs and outputs, plus a 5-12V power input. Then you can use SMA-SMA cables with a SMA-BNC adapter at the scope end and choose where the power comes from, either from the USB (directly or via a small hub, which is what I use), or from a bench power supply.
S. Petrukhin:
--- Quote from: Gandalf_Sr on September 02, 2020, 09:23:54 am ---I too thought about designing a PCB that plugged into the USB & the 2 BNC connectors but, if you want to use the USB port for more than 1 thing e.g. mouse, USB drive, power for your voltage doubler, your approach will be problematic. I use SMA connectors so I think a better idea is to build a single PCB that has 2 SMA inputs and outputs, plus a 5-12V power input. Then you can use SMA-SMA cables with a SMA-BNC adapter at the scope end and choose where the power comes from, either from the USB (directly or via a small hub, which is what I use), or from a bench power supply.
--- End quote ---
It is not a problem to make an end-to-end USB channel from the oscilloscope's USB connector to the USB connector on the amplifier's PCB.
Along the way we can take away a bit of power for the amplifier. I don't like free-standing boxes. :)
Gandalf_Sr:
--- Quote from: S. Petrukhin on September 02, 2020, 11:30:27 am ---It is not a problem to make an end-to-end USB channel from the oscilloscope's USB connector to the USB connector on the amplifier's PCB.
Along the way we can take away a bit of power for the amplifier. I don't like free-standing boxes. :)
--- End quote ---
Yes, that is a good idea. One question is to make sure that the 5V supply from the USB connection doesn't bring noise into the amplifiers.
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