2 layers19 × 76 mm
Sub
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
15 parts3kApache-2.0
2 layers65 × 56 mm
Crossover2025-12-29
PrototypeZone/tech150Welcome to TECH 150 - Please attend your labs with your parts kit and your lab manual. Bookstore will possibly be restocked 2025-05-23.
- Size
- 65 × 56 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 44
- Pads
- 78
- Tracks, vias
- 140, 15
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 7 May 2025
- Updated
- 3 Jan 2026
Overview
Crossover2025-12-29 is an open-source printed circuit board by PrototypeZone, from the PrototypeZone/tech150 repository on GitHub, published under the AGPL-3.0 licence. It is a 2-layer board of 65 × 56 mm with 15 parts on 44 nets, routed with 140 tracks and 15 vias.
Its parts include 7 connectors, 2 resistors, 1 diode and 1 transistor.
README
README.mdtech150
Welcome to TECH 150 - Please attend your labs with your parts kit and your lab manual. Bookstore will possibly be restocked 2025-05-23.
2025 May-June Lab Schedule (Tentative)
| Week | A | B | Topics/Assignment | Due % |
|---|---|---|---|---|
| 1 | 2025-05-07 | 2025-05-08 | Exp. 1 Part 1, Part 2: Introduction to Semiconductors xy mode | Show lab01 measurements |
| 2 | 2025-05-14 | 2025-05-15 | Exp. 2 (rectification and clipping during lab) Part 1, Part 2, Part 3: Diodes and Applications We have MultiSim on myApps | Lab01 paper copy, Show lab02 measurements |
| 2025-05-19 | 2025-05-19 | Monday Public Holiday (Victoria Day) - College Closed | ||
| 3 | 2025-05-21 | 2025-05-22 | Exp. 3 Part 1: Special Purpose Diodes Steps 1-9 Conclusion/Questions: Part 1: 1,2,3 | Lab02 paper copy, Show lab03 Table 3-2 |
| 4 | 2025-05-29 | Exp. 8 Part 1 Steps 1-10 step 11 IDSS (IDS with VGS shorted), Part 3: Field-Effect Transistors (FETs) (Part 1 Step 2 should read Keep VGG at 0V and slowly increase VDD (to about 1.4V) until VDS is 1.0V and Part3 Rs use 220Ohm, Rd use 3.3kOhm) | Lab03 paper copy, Show lab04 measurements | |
| 2025-06-04 | Exp. 8 Part 1 Steps 1-10 step 11 IDSS (IDS with VGS shorted), Part 3: Field-Effect Transistors (FETs) (Part 1 Step 2 should read Keep VGG at 0V and slowly increase VDD (to about 1.4V) until VDS is 1.0V and Part3 Rs use 220Ohm, Rd use 3.3kOhm) | Lab03 paper copy, Show lab04 measurements | ||
| 5 | 2025-06-05 | Exp. 9 Part 1 (Step 4 use Rs=560 Ohm instead of 620 Ohm), Part 2: FET Amplifiers and Switching Circuits | Lab04 paper copy, Show lab05 measurements | |
| Reminder that parts signed out from the parts crib are to be returned the same day | ||||
| 6 | 2025-06-11 | Exp. 9 Part 1 (Step 4 use Rs=560 Ohm instead of 620 Ohm) | Submit Exp. 8 Part 1 and Part 3 paper copy | |
| Show the completed Table 9-2 prior to leaving the lab. | ||||
| For next week: | ||||
| -Each student is to build Figure 9-2 (without the JFET before the lab) | ||||
| -Regarding submitting part 1, please make sure that you are submitting on paper you have rights to | ||||
| 2025-06-12 | Exp. 9 Part 3: FET Amplifiers (Use R2=560Ohm, R3=200kOhm, R4=470kOhm) | Lab05 paper copy, Show lab06 measurements | ||
| -Regarding recording measurements for part 3, please make sure that you are writing/submitting Tables 9-6,9-7,9-8,9-9, Step 6 What effect if any? Q1 and Q2 on paper you have rights to | ||||
| 7 | 2025-06-18 | Individual Lab Overall Evaluation Figure 9-2 built without the JFET prior to the lab (5%) | Exp.9 Part 1 paper copy, labtest1 | |
| 2025-06-19 | Individual Lab Overall Evaluation Figure 9-2 built without the JFET prior to the lab (5%) | Exp.9 Part 3 paper copy, labtest1 | ||
| 2025-06-25 | 2025-06-26 | Reading Week, No Class Scheduled |
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole_2.7mm_M2.5 | MountingHole:MountingHole_2.7mm_M2.5 | MH1, MH2, MH3, MH4 |
| 1 | 2.2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R1 |
| 1 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R2 |
| 1 | 2N4124 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1 |
| 1 | Conn_01x02_Pin | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J6 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | J4 |
| 1 | Conn_01x04_Female | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Horizontal | J3 |
| 1 | Conn_01x08_Socket | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Horizontal | J5 |
| 1 | GPIO | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical | J1 |
| 1 | LED | LED_THT:LED_D5.0mm_Horizontal_O1.27mm_Z3.0mm | D1 |
| 1 | Qwiic Right Angle | Connector_PinSocket_2.00mm:PinSocket_1x04_P2.00mm_Horizontal | J2 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-2-2.54_1x02_P2.54mm_Horizontal | J7 |
Questions
How big is the Crossover2025-12-29 PCB?
It measures 65 × 56 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Crossover2025-12-29 use?
15 parts. 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.
Where can I download the Crossover2025-12-29 KiCad files?
From the PrototypeZone/tech150 repository on GitHub, at the commit this page was made from: the board is media/Crossover2025-12-29.kicad_pcb and its schematic media/Crossover2025-12-29.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Crossover2025-12-29 design in my own project?
Its repository publishes it under the AGPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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