Geiger
About the Geiger PCB
Geiger is an open source ESP32 PCB design by KrzysztofMathiak, published on GitHub. It is a 2-layer board measuring 117 × 74 mm, with 38 components from 28 distinct parts.
Its main chip is the nodemcu-esp32, from the ESP32 family. Other key parts include the NE555P, LM336Z25, LM311, STEP-DOWN-5V and GEIGERTUBE-STS6. By type, the board carries 20 resistors, 6 ICs, 3 transformers, 3 diodes, 3 capacitors and 1 connector.
It belongs with the science & space designs in this gallery.
From the project
kicad files
Main components on the Geiger
Geiger bill of materials (BOM)
38 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NE555P | DIP-8_W7.62mm | U1 |
| 1 | LM336Z25 | TO-92_Inline | U2 |
| 1 | LM311 | DIP-8_W7.62mm | U3 |
| 1 | STEP-DOWN-5V | DIP-4_641_ELL | U4 |
| 1 | nodemcu-esp32 | NODEMCU_ESP32 | U5 |
| 1 | GEIGERTUBE-STS6 | TerminalBlock_Altech_AK300-2_P5.00mm | U6 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Altech_AK300-2_P5.00mm | J1 |
| 1 | SW_SPST | PinSocket_1x02_P2.54mm_Vertical | SW1 |
| 1 | IPAN70R450P7S | TO-247-3_Vertical | T1 |
| 1 | P55NF06 | TO-220-3_Vertical | T2 |
| 1 | BC517 | TO-92_Inline | T3 |
| 1 | MUR160 600V | D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 1.5KE440A | D_DO-201AE_P15.24mm_Horizontal | D2 |
| 1 | LED | LED_D3.0mm | D3 |
| 1 | 1mh | L_Radial_D8.7mm_P5.00mm_Fastron_07HCP | L1 |
| 1 | 10n | C_Disc_D3.8mm_W2.6mm_P2.50mm | C1 |
| 1 | 1n | C_Disc_D3.8mm_W2.6mm_P2.50mm | C2 |
| 1 | 100n | C_Rect_L18.0mm_W5.0mm_P15.00mm_FKS3_FKP3 | C3 |
| 1 | 47k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R7, R32 |
| 7 | 1M | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R12, R13, R14, R15, R16, R20 |
| 1 | 5k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5 |
| 1 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6 |
| 1 | 20k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R11 |
| 2 | 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R21, R31 |
| 2 | 3.3k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R22, R23 |
| 1 | 1.5k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R40 |
Geiger design files
The KiCad project lives in the KrzysztofMathiak/geiger-kicad repository on GitHub; these links point at the commit this page was built from.
- Layoutgeiger.kicad_pcb
Geiger: common questions
What microcontroller does the Geiger use?
The Geiger is built around the nodemcu-esp32, from the ESP32 family.
How big is the Geiger PCB?
The Geiger measures 117 × 74 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Geiger?
38 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the Geiger design files?
From the KrzysztofMathiak/geiger-kicad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Geiger design in my own project?
The repository has no license, so all rights stay with KrzysztofMathiak. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Geiger without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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