
Pico w rover
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Open source screw counting machine
OpenScrewCounter is an open-source printed circuit board by Indystrycc, from the Indystrycc/OpenScrewCounter repository on GitHub. It is a 2-layer board of 54.6 × 85.1 mm with 28 parts on 48 nets, routed with 190 tracks and 1 via.
It is built around the L7805 and IRFZ44N. Its parts include 9 resistors, 6 switches, 3 ICs, 2 capacitors and 2 connectors. It belongs with the RP2040 boards of this library.

Designed by Nikodem Bartnik.
OpenScrewCounter is a machine built to count various small screws. It was built to simplify the counting procedure of set of screws for IndyMill CNC machine. Researching similar solutions resulted in rejecting a few early ideas for the design of this project and in the end a approach presented above was implemented. At this stage the machine is not perfect and some upgrades are required to make it production ready.
Project is open source and all the files and the code are available above. Feel free to use it, modify and share with others. Contributing to the project is more than welcome!
| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 330 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H7.3mm | SW1, SW2, SW3 |
| 3 | Sensor | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | S1, S2, S3 |
| 1 | 100u | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C1 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R9 |
| 1 | 10u | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C2 |
| 1 | Barrel_Jack_MountingPin | Connector_BarrelJack:BarrelJack_Horizontal | J5 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | CA56-12EWA | Display_7Segment:CA56-12EWA | U1 |
| 1 | IRFZ44N | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U3 |
| 1 | P1 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J2 |
| 1 | pi pico | RaspberryPi:raspberry pi pico | U2 |
The 24 most common of 28 parts.

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It measures 54.6 × 85.1 mm and has 2 copper layers, 1.6 mm thick.
28 parts, built around the L7805 and IRFZ44N. 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 Indystrycc/OpenScrewCounter repository on GitHub, at the commit this page was made from: the board is pcb/OpenScrewCounter.kicad_pcb and its schematic pcb/OpenScrewCounter.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 Indystrycc before reusing the design.