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How to send the zoom command to the network camera using the CURL?
My camera supports ONVIF capability. I can zoom in, go to preset with ONVIF Device Manager software.
Please advise me how to do this using CURL.
I want to generate an ac signal 300Vp-p Which is added with a dc voltage (0-20 V) With a maximum current of 4 amps.
Nobody has an idea for the circuit.
I'm looking for two Bluetooth audio modules that can be connected.
all Bluetooth audio modules can be connected to a computer or mobile phone,
but I need a module to connect to a Bluetooth headset without using a computer or mobile phone.
Can anyone suggest me a module?
Thank you for your attention
This is not a electered microphone because it needs to be biased،but my circuit does not have any powers and is like a piezo drive
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