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ATtiny85 USB Tester

6 months ago 945
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Simple USB Power Tester based on ATtiny45/85 and INA219. You can switch between different screens by pressing the SET button.

Project Video: https://youtu.be/QKx8Vn_IfjU

Parameter Value
Voltage 3V - 12V
Current max 5A
Resolution 4mV / 1mA

IMG_20200528_172038_x.jpgIMG_20200528_172119_x.jpgIMG_20200528_172221_x.jpgIMG_20200528_172239_x.jpgIMG_20200809_110421_x.jpgIMG_20200809_110600_x.jpg

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This work is licensed under Creative Commons Attribution-ShareAlike 3.0 Unported License. (http://creativecommons.org/licenses/by-sa/3.0/)

Documents

USB Tester

USB_Tester_v1.0

BOM

ID Name Designator Footprint Quantity BOM_Manufacturer Part
1 OLED 0.91 OLED I2C OLED 0.91 1 SSD1306 I2C OLED
2 POWER OUT USB2 USB-2.0-A-F-90-JCJ-H9.36 1 USB-A-F-90
3 POWER IN USB1 USB-M-48 1 USB-05
4 TS24CA RESET,SET SW-SMD_TS24CA 2 TS24CA
5 10k R3,R4,R1 0603 3 0603WAF1002T5E
6 ATtiny85 U1 SOIC-8_208MIL 1 ATTINY85-20SU
7 HT7333-A U3 SOT-89-3_L4.5-W2.5-P1.50-LS4.2-BR 1 HT7333-A
8 INA219 U2 SOT-23-8_L3.0-W1.7-P0.65-LS2.8-BL 1 INA219AIDCNR
9 100n C3,C1 0603 2 CC0603KRX7R9BB104
10 10u C4,C5 0603 2 CL10A106MA8NRNC
11 47u C2 1206 1 CL31A476MQHNNNE
12 R008 R2 2512 1 LCSR2512FR008Q9L

Attachments

Filename Download
USB_Tester_firmware_v1.1.zip
USB_Tester_case_3dprint.zip
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Comments (6)

jettetsoi Reply

Thank you very much for the great project again. I have made one but I found that  there is something wrong. It always shows 5000mA. What should I do to fix the problem?
PXL_20201106.jpg

Stefan Wagner Reply

@jettetsoi Hi, my first idea is a wrong shunt resistor. Please check R2 (the big one labeled R008) with a multimeter. It should be 8 mOhms.

jettetsoi Reply

@wagiminator ouch, I used a R300 resistor.  I will change it. Thank you very much.

Stefan Wagner Reply

@jettetsoi Hi, I checked everything again. Everything was correct in the schematic and on the silkscreen, but in the Bill of Material (BOM) the part number of R2 referred to an R300 resistor. This is probably what caused the problem. The bug in the BOM is now fixed.

jettetsoi Reply

@wagiminator Thank you very much.  I used a R008 resistor and it works fine now.

Stefan Wagner Reply

@jettetsoi ;-)

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