2 layers79.8 × 55 mm
RobertGawron IonizationChamber Amplifier
punkfab/pcb-corpus
235 real KiCad boards from open-source hardware repositories, prepared as a placement and routing benchmark
36 parts1
2 layers37 × 36 mm
MaoRad
Maobuff/MaoRad1Gamma radiation detector
- Size
- 37 × 36 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 24
- Nets
- 13
- Pads
- 58
- Tracks, vias
- 141, 13
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 17 Aug 2022
- Updated
- 18 Aug 2022
Overview
MaoRad is an open-source printed circuit board by Maobuff, from the Maobuff/MaoRad repository on GitHub, published under the MIT licence. It is a 2-layer board of 37 × 36 mm with 24 parts on 13 nets, routed with 141 tracks and 13 vias.
It is built around the LMC6062IN, LM1117-5.0 and BPW34, with the MMBT3904 among its other parts. Its parts include 11 capacitors, 8 resistors, 2 ICs, 1 diode and 1 transistor.
Main components
4
LMC6062IN
PDIP-8-40℃~+85℃ 100kHz 13mA 16uA 1uV/℃ 2 2pA 35V/ms 4.5V~15V 4pA 800uV 83nV/√Hz@1kHz 85dB Rail-to-rail output PDIP-8 Precision Op Amps ROHSTexas InstrumentsOperational Amplifier
LM1117-5.0
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 5V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorised
BPW34
插件,P=5.1mm-40℃~+100℃ 215mW 2nA 430nm~1100nm 60V 900nm ±65° 插件,P=5.1mm Photodiodes ROHSVishay IntertechnologyPhotodiodes
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
README
README.mdMadRad
My(maobuff) attempt at catching gamma photons.
Schemaic
Remarks:
Increasing diode count doesn't improve sensitivity (TODO: check with comparator and counter).
Scintillator crystal is a MUST to improve sensitivity to be able to register natural radiation photons.
I highly recommend replacing BPW34 with a bigger diode with more surface area. For example, FirstSensor is manufacturing PIN diodes with a build-in scintillator.
Probably losing some gain to LMC662 bandwidth.
What next?
Add a guard ring to the second stage on the PCB.
Improve sensitivity
Add comparator and counter
Sound or light effects
Improve SNR
Increase gain
SpectrometryDevice assembled
Output waveform example from Radium-226
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3, R4, R7 |
| 3 | 10uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C5 |
| 2 | 1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C6, C9 |
| 2 | 22uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3, C4 |
| 1 | 10 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5 |
| 1 | 100nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C7 |
| 1 | 10M | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6 |
| 1 | 10pF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C11 |
| 1 | 1M | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R8 |
| 1 | 1nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C10 |
| 1 | 2pF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C8 |
| 1 | 47k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2 |
| 1 | 75k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | BPW34 | OptoDevice:Osram_SMD-DIL2_4.5x4.0mm | D1 |
| 1 | Conn | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | J1 |
| 1 | LM1117-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | LMC6062 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1 |
Questions
How big is the MaoRad PCB?
It measures 37 × 36 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MaoRad use?
24 parts, built around the LMC6062IN, LM1117-5.0, BPW34 and MMBT3904. 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 MaoRad KiCad files?
From the Maobuff/MaoRad repository on GitHub, at the commit this page was made from: the board is hardware/MaoRad.kicad_pcb and its schematic hardware/MaoRad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MaoRad design in my own project?
Its repository publishes it under the MIT 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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