Safepulse
About the Safepulse PCB
Safepulse is an open source PCB design by Safecast, published on GitHub. It is a 4-layer board measuring 40.6 × 20.8 mm, with 76 components from 40 distinct parts.
Other key parts include the S-35770E01I-K8T2U, TS4061AICT-1.25, 74HC14, CD14538BM and MAX9910EXK+T. By type, the board carries 27 resistors, 26 capacitors, 9 diodes, 5 ICs, 4 transistors and 3 inductors.
It belongs with the science & space and power & battery designs in this gallery.
From the project
Open Source HVS for geiger counters.
An open-source high-voltage power supply (HVPS) and pulse counter designed for Geiger tubes. The Safepulse is utilized in the newest version of Safecast devices, the bGeigieZen and can be bough directly at https://bgeigiezen.safecast.jp/store-2/safepulse/
- Overview - History - Features - Getting Started - Prerequisites - Installation - Documentation - Contributing - Issues and Support - License
Main components on the Safepulse
Safepulse bill of materials (BOM)
76 components, 40 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | S-35770E01I-K8T2U | SOP65P400X80-8N | IC1 |
| 1 | TS4061AICT-1.25 | SOT-323_SC-70 | U1 |
| 1 | 74HC14 | SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | CD14538BM | SOIC-16_3.9x9.9mm_P1.27mm | U4 |
| 1 | MAX9910EXK+T | SOT-353_SC-70-5 | U33 |
| 1 | FQT7N10L | SOT-223-3_TabPin4 | Q1 |
| 1 | BC846A | SOT-323_SC-70 | Q2 |
| 2 | MMBT3906 | SOT-23 | Q3, Q4 |
| 1 | 4208 JST SM04B-SRSS-TB(LF)(SN) | 4208 | J2 |
| 1 | C20978 Polyfuse | R_0805_2012Metric | F1 |
| 2 | BAS16J | D_SOD-323 | D1, D2 |
| 7 | BAV23S | SOT-23 | D3, D4, D5, D6, D7, D8, D9 |
| 2 | 74279220321 | R_0805_2012Metric | FB1, FB2 |
| 1 | 4.7UH 4.7uH | L_Taiyo-Yuden_MD-4040 | L1 |
| 1 | 110PF 110pF | C_0805_2012Metric | C1 |
| 5 | 10UF 10uF | C_0805_2012Metric | C2, C5, C19, C23, C27 |
| 1 | 1NF 1nF | C_0805_2012Metric | C3 |
| 1 | 47UF 47uF | C_0805_2012Metric | C4 |
| 14 | 0.1UF 0.1uF | C_0805_2012Metric | C6, C7, C8, C9, C10, C11, C12, C13 +6 |
| 1 | 100PF 100pF | C_0805_2012Metric | C20 |
Show 20 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 390PF 390pF | C_0805_2012Metric | C22 |
| 1 | 10NF 10nF | C_0805_2012Metric | C24 |
| 1 | 2.2UF 2.2uF | C_0805_2012Metric | C25 |
| 1 | 4.99M | R_1206_3216Metric | R1 |
| 1 | 10M | R_1206_3216Metric | R2 |
| 3 | 100K 100k | R_0805_2012Metric | R3, R13, R19 |
| 1 | 10K | R_0805_2012Metric | R4 |
| 3 | 100 | R_0805_2012Metric | R5, R12, R25 |
| 1 | 121K 121k | R_0805_2012Metric | R6 |
| 5 | 22M | R_0805_2012Metric | R7, R8, R9, R10, R26 |
| 2 | 33K 33k | R_0805_2012Metric | R11, R24 |
| 1 | 357K 357k | R_0805_2012Metric | R14 |
| 1 | 220K 220k | R_0805_2012Metric | R15 |
| 1 | 1M | R_0805_2012Metric | R16 |
| 1 | 499K 499k | R_0805_2012Metric | R17 |
| 1 | 1k | R_0805_2012Metric | R18 |
| 1 | 118K | R_0805_2012Metric | R20 |
| 1 | 47K 47k | R_0805_2012Metric | R21 |
| 1 | 20K | R_0805_2012Metric | R22 |
| 2 | 1.54M | R_0805_2012Metric | R23, R27 |
Safepulse design files
The KiCad project lives in the Safecast/safepulse repository on GitHub; these links point at the commit this page was built from.
- LayoutSafePulse.kicad_pcb
- SchematicSafePulse.kicad_sch
- BOMproduction/bom.csv
Safepulse: common questions
How big is the Safepulse PCB?
The Safepulse measures 40.6 × 20.8 mm, has 4 copper layers and is 1.59 mm thick.
How many components are on the Safepulse?
76 components, from 40 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 Safepulse design files?
From the Safecast/safepulse repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Safepulse design in my own project?
The repository has no license, so all rights stay with Safecast. Use it as a reference, and ask the author before reusing the design.
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