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hardwarerelated:avhzy_ct-3
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| hardwarerelated:avhzy_ct-3 [2022/11/15 05:17] – [Why?] chris | hardwarerelated:avhzy_ct-3 [2022/11/15 05:17] (current) – [Details] chris | ||
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| + | ===== What is it? ===== | ||
| + | A power meter. My summary so far: my goal is to measure power consumption of my Thinkpad, and be able to read the consumption details from Linux. Right now, I can only supply the Thinkpad with 5V@2A when the CT-3 is used, while the Thinkpad would also support 20V@3A. ([[https:// | ||
| + | ===== Kernel messages ===== | ||
| + | < | ||
| + | [17217.725904] usb 1-2: USB disconnect, device number 19 | ||
| + | [17222.280704] usb 1-2: new full-speed USB device number 20 using xhci_hcd | ||
| + | [17222.409132] usb 1-2: New USB device found, idVendor=0483, | ||
| + | [17222.409151] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 | ||
| + | [17222.409158] usb 1-2: Product: Shizuku in Application Mode | ||
| + | [17222.409163] usb 1-2: Manufacturer: | ||
| + | [17222.409168] usb 1-2: SerialNumber: | ||
| + | [17222.414835] cdc_acm 1-2:1.0: ttyACM0: USB ACM device | ||
| + | [17222.415891] usb-storage 1-2:1.2: USB Mass Storage device detected | ||
| + | [17222.416310] scsi host0: usb-storage 1-2:1.2 | ||
| + | [17223.440649] scsi 0:0:0:0: Direct-Access | ||
| + | [17223.441393] sd 0:0:0:0: Attached scsi generic sg0 type 0 | ||
| + | [17223.455133] sd 0:0:0:0: [sda] Attached SCSI removable disk | ||
| + | </ | ||
| + | ===== Details ===== | ||
| + | |||
| + | * [[https:// | ||
| + | * power consumption of some devices, measured with the Satechi metering device: | ||
| + | * Google pixel 4a: | ||
| + | * rapidly: 9V0.8A (power supply PD), 4.8V1.6A (thinkpad usb-c out) | ||
| + | * charging: 4.6V0.7A (thinkpad usb-A out left side) | ||
| + | * charging slowly: 4.7V0.5A (thinkpad usb-A out right side) | ||
| + | * Thinkpad L480: | ||
| + | * 20V@0.8A | ||
| + | * devices with CT-3 | ||
| + | * input thinkpad usb-A left: PD3 5V | ||
| + | * out right side usb-A, red cable: 5V@0.7A (pixel4a load) | ||
| + | * input thinkpad usb-C: PD3 5V@3A | ||
| + | * out right side usb-A, black cable: 5V@0.5A | ||
| + | * input power supply: PD3 5V@3A, 9V@3A, 15V@3A, 20V@3.25A | ||
| + | * out right side usb-A, red cable: 5V@0.4A (pixel4a load), 5V@1.7A (thinkpad load) | ||
| + | * out right side usb-A, black cable: 5V@1.3A (pixel4a load), 5V@2A (thinkpad load) | ||
| + | * out up side usb-C, white cable: | ||
| + | * 9V@0.7A (pixel4a load) | ||
| + | * 20V@0A, "A correct CC attachment is detected, but no source_cap is received in time.", | ||
| + | |||
| + | ===== Why? ===== | ||
| + | I want to see how much power for example the Thinkpad uses, and how accurate the internal computation from powertop is. | ||
| + | * Right now, I just managed to get the CT-3 to supply 5V to the Thinkpad, and with no load the Thinkpad then uses 3 or 4W. | ||
| + | * Powertop shows a bit more, 5W, but correct scale. | ||
| + | * Powertop supports direct interaction with a power meter, Extech* Power Analyzer/ | ||
| + | * Unfortunately, | ||
hardwarerelated/avhzy_ct-3.txt · Last modified: 2022/11/15 05:17 by chris
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