R5/R6 - Battery / Coupler / Charging in the field - lessons & questions
EB-1 wrote:
Does anyone have scope traces of the voltage at the camera in use? Reading all this again, I'm not so convinced that the power supply setup is optimal or even reliably safe in the long term. The USB power banks are not designed for the purpose being implemented. I'm especially interested in the transient response as the load changes.
EBH
Data!
Go ahead and post your conclusions... or interpretation of the data. My intent was to show worst case.
Some observations:
- Charging is drawing at 5 volts.. so this tells me you can hook up any old power brick, PD or non-PD as they put out 5 volts (the old USB standard)
- If you have a PD brick, it will negotiate a higher voltage (5 to charge, 9 to run) and therefore will go ahead and draw the amps. This may explain why it may not work with lower power bricks assuming it is negotiating a higher voltage.. if it can't get it... it assumes a simple 5volt charging brick.
- 2 amps at 9 volts... wow, that is alodda juice! This is what is probably behind the white and flashing white H.
- The camera and battery are clearly talking to each other and negotiating voltage... either 5 or 9 depending on the camera state. This is beauty and value of PD protocol in action.
BTW, I don't know what the testing instrument drew or how its draw is manifested in the display.
R5/R6 - Battery / Coupler / Charging in the field - lessons & questions
EB-1 wrote:
Does anyone have scope traces of the voltage at the camera in use? Reading all this again, I'm not so convinced that the power supply setup is optimal or even reliably safe in the long term. The USB power banks are not designed for the purpose being implemented. I'm especially interested in the transient response as the load changes.
EBH
Data!
Go ahead and post your conclusions... or interpretation of the data. My intent was to show worst case.
Some observations:
- Charging is drawing at 5 volts.. so this tells me you can hook up any old power brick, PD or non-PD as they put out 5 volts (the old USB standard)
- If you have a PD brick, it will negotiate a higher voltage (5 to charge, 9 to run) and therefore will go ahead and draw the amps. This may explain why it may not work with lower power bricks assuming it is negotiating a higher voltage.. if it can't get it... it assumes a simple 5volt charging brick.
- 2 amps at 9 volts... wow, that is alodda juice! This is what is probably behind the white and flashing white H.
- The camera and battery are clearly talking to each other and negotiating voltage... either 5 or 9 depending on the camera state. This is beauty and value of PD protocol in action.
BTW, I don't know what the testing instument drew or how its draw is manifested in the display.
R5/R6 - Battery / Coupler / Charging in the field - lessons & questions
EB-1 wrote:
Does anyone have scope traces of the voltage at the camera in use? Reading all this again, I'm not so convinced that the power supply setup is optimal or even reliably safe in the long term. The USB power banks are not designed for the purpose being implemented. I'm especially interested in the transient response as the load changes.
EBH
Data!
Go ahead and post your conclusions... or interpretation of the data. My intent was to show worst case.
Some observations:
- Charging is drawing at 5 volts.. so this tells me you can hook up any old power brick, PD or non-PD as they put out 5 volts (the old USB standard)
- If you have a PD brick, it will negotiate a higher voltage (5 to charge, 9 to run) and therefore will go ahead and draw the amps. This may explain why it may not work with lower power bricks assuming it is negotiating a higher voltage.. if it can't get it... it assumes a simple 5volt charging brick.
- 2 amps at 9 volts... wow, that is alodda juice! This is what is probably behind the white and flashing white H.
- The camera and battery are clearly talking to each other and negotiating voltage... either 5 or 9 depending on the camera state. This is beauty and value of PD protocol in action.
BTW, I don't know what the test unit drew or how its draw is manifested in the display.
R5/R6 - Battery / Coupler / Charging in the field - lessons & questions
EB-1 wrote:
Does anyone have scope traces of the voltage at the camera in use? Reading all this again, I'm not so convinced that the power supply setup is optimal or even reliably safe in the long term. The USB power banks are not designed for the purpose being implemented. I'm especially interested in the transient response as the load changes.
EBH
Data!
Go ahead and post your conclusions... or interpretation of the data. My intent was to show worst case.
Some observations:
- Charging is drawing at 5 volts.. so this tells me you can hook up any old power brick, PD or non-PD as they put out 5 volts (the old USB standard)
- If you have a PD brick, it will negotiate a higher voltage (5 to charge, 9 to run) and therefore will go ahead and draw the amps. This may explain why it may not work with lower power bricks assuming it is negotiating a higher voltage.. if it can't get it... it assumes a simple 5volt charging brick.
- 2 amps at 9 volts... wow, that is alodda juice! This is what is probably behind the white and flashing white H.
BTW, I don't know what the test unit drew or how its draw is manifested in the display.
R5/R6 - Battery / Coupler / Charging in the field - lessons & questions
EB-1 wrote:
Does anyone have scope traces of the voltage at the camera in use? Reading all this again, I'm not so convinced that the power supply setup is optimal or even reliably safe in the long term. The USB power banks are not designed for the purpose being implemented. I'm especially interested in the transient response as the load changes.
EBH
Data!
Go ahead and post your conclusions... or interpretation of the data. My intent was to show worst case.
Some observations:
- Charging is drawing at 5 volts.. so this tells me you can hook up any old power brick, PD or non-PD as they put out 5 volts (the old USB standard)
- If you have a PD brick, it will negotiate a higher voltage and therefore will go ahead and draw the amps. This may explain why it may not work with lower power bricks assuming it is negotiating a higher voltage.. if it can't get it... it assumes a simple 5volt charging brick.
- 2 amps at 9 volts... wow, that is alodda juice! This is what is probably behind the white and flashing white H.
BTW, I don't know what the test unit drew or how its draw is manifested in the display.
R5/R6 - Battery / Coupler / Charging in the field - lessons & questions
EB-1 wrote:
Does anyone have scope traces of the voltage at the camera in use? Reading all this again, I'm not so convinced that the power supply setup is optimal or even reliably safe in the long term. The USB power banks are not designed for the purpose being implemented. I'm especially interested in the transient response as the load changes.
EBH
Data!
Go ahead and post your conclusions... or interpretation of the data. My intent was to show worst case.
Some observations:
- Charging is drawing at 5 volts.. so this tells me you can hook up any old power brick as they put out 5 volts (the old USB standard)
- If you have a PD brick, it will negotiate a higher voltage and therefore will go ahead and draw the amps. This may explain why it may not work with lower power bricks assuming it is negotiating a higher voltage.. if it can't get it... it assumes a simple 5volt charging brick.
- 2 amps at 9 volts... wow, that is alodda juice! This is what is probably behind the white and flashing white H.
BTW, I don't know what the test unit drew or how its draw is manifested in the display.
R5/R6 - Battery / Coupler / Charging in the field - lessons & questions
EB-1 wrote:
Does anyone have scope traces of the voltage at the camera in use? Reading all this again, I'm not so convinced that the power supply setup is optimal or even reliably safe in the long term. The USB power banks are not designed for the purpose being implemented. I'm especially interested in the transient response as the load changes.
EBH
Data!
Go ahead and post your conclusions... or interpretation of the data. My intent was to show worst case.
Some observations:
- Charging is drawing at 5 volts.. so this tells me you can hook up any old power brick as they put out 5 volts
- If you have a PD brick, it will negotiate a higher voltage and therefore will go ahead and draw the amps. This may explain why it may not work with lower power bricks assuming it is negotiating a higher voltage.. if it can't get it... it assumes a simple 5volt charging brick.
- 2 amps at 9 volts... wow, that is alodda juice! This is what is probably behind the white and flashing white H.
BTW, I don't know what the test unit drew or how its draw is manifested in the display.
Peace
Bruce in Philly
Jan 03, 2021 at 06:22 PM
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