
SuperPower RPi KiCAD
SensorsIot/SuperPower
Here you should find the best power supplies for your low-power projects

ATTiny 85 based Current & Voltage measurement tool
Measure is an open-source printed circuit board by NikhilMotagi, from the NikhilMotagi/FancyDMM repository on GitHub. It is a 2-layer board of 30 × 30 mm with 15 parts on 13 nets, routed with 111 tracks and 9 vias.
It is built around the ATTINY85-20SU and AMS1117-3.3. Its parts include 4 ICs, 3 resistors, 2 connectors, 1 capacitor and 1 switch. It belongs with the sensors and measurement boards and the AVR (ATmega, ATtiny) boards of this library.
Inspired by the Atmega328P-based voltage and current measuring device utilizing the INA266 current sensor, I aim to create a more compact and cost-effective version using the versatile ATTiny microcontroller. This project will involve designing a circuit to measure both voltage and current, processing the data using the ATTiny, and displaying the results on an appropriate display. To keep the code size low, I used Bare Metal coding.
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link : https://hackaday.io/project/191203-mini-oled-panel-meter
| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | LOGO | sche:tinyZINGER | G***, G*** |
| 2 | R | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | ATtiny85-20S | Package_SO:SOIC-8W_5.3x5.3mm_P1.27mm | U1 |
| 1 | Battery_conn | Connector_JST:JST_GH_SM02B-GHS-TB_1x02-1MP_P1.25mm_Horizontal | J2 |
| 1 | C | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | IN | TestPoint:TestPoint_Pad_4.0x4.0mm | TP1 |
| 1 | INA226 | Package_SO:VSSOP-10_3x3mm_P0.5mm | U2 |
| 1 | Makeshift_SPI_header | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J1 |
| 1 | OUT | TestPoint:TestPoint_Pad_4.0x4.0mm | TP2 |
| 1 | R | Resistor_SMD:R_2512_6332Metric | R1 |
| 1 | SSD1306_OLEDModule | sche:SSD1306_OLEDModule | U4 |
| 1 | SW_SPST | Button_Switch_SMD:SW_SPDT_CK-JS102011SAQN | SW1 |

SensorsIot/SuperPower
Here you should find the best power supplies for your low-power projects

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It measures 30 × 30 mm and has 2 copper layers, 1.6 mm thick.
15 parts, built around the ATTINY85-20SU and AMS1117-3.3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the NikhilMotagi/FancyDMM repository on GitHub, at the commit this page was made from: the board is measure.kicad_pcb and its schematic measure.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask NikhilMotagi before reusing the design.