Entropy r3
About the Entropy r3 PCB
Entropy r3 is an open source PCB design by sokrasins, published on GitHub. It is a 2-layer board measuring 21 × 28 mm, with 32 components from 16 distinct parts.
Other key parts include the TLV3201, NL17SZ74 and TPS61041DDC. By type, the board carries 13 resistors, 7 capacitors, 6 transistors, 3 ICs, 1 connector and 1 diode.
Main components on the Entropy r3
Entropy r3 bill of materials (BOM)
32 components, 16 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TLV3201 | SOT-23-5 | U1 |
| 1 | NL17SZ74 | VSSOP-8_2.3x2mm_P0.5mm | U2 |
| 1 | TPS61041DDC | SOT-23-5 | U3 |
| 6 | PMBT3904 | SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6 |
| 1 | Conn_01x04_Female | PinSocket_1x04_P2.54mm_Vertical | J1 |
| 1 | MBR0530 | D_SOD-123 | D1 |
| 1 | 10u | L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | L1 |
| 4 | 0.1u | C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C1, C2, C3, C5 |
| 2 | 10u | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4, C7 |
| 1 | 22p | C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C6 |
| 6 | 15k | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R1, R4, R5, R6, R11, R12 |
| 2 | 2.7M | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R2, R7 |
| 2 | 10k | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R3, R13 |
| 1 | 2.2M | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R8 |
| 1 | 160k | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R9 |
| 1 | 0R | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R10 |
Entropy r3 design files
The KiCad project lives in the sokrasins/dicecalc repository on GitHub; these links point at the commit this page was built from.
Entropy r3: common questions
How big is the Entropy r3 PCB?
The Entropy r3 measures 21 × 28 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Entropy r3?
32 components, from 16 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Entropy r3 design files?
From the sokrasins/dicecalc repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Entropy r3 design in my own project?
The repository has no license, so all rights stay with sokrasins. Use it as a reference, and ask the author before reusing the design.
More boards in dicecalc
Earlier revisions in the repo: entropy r2, entropy