2 layers224.2 × 153.7 mm
2 layers99.1 × 63.5 mm
Differential Probe
tcfh2003/LowCostDifferentialProbeLow Cost Differential Probe with 10 MHz bandwidth and 240V maximum input voltage
- Size
- 99.1 × 63.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 58
- Nets
- 28
- Pads
- 138
- Tracks, vias
- 207, 12
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 4 Mar 2025
- Updated
- 4 Mar 2025
Overview
Differential Probe is an open-source printed circuit board by tcfh2003, from the tcfh2003/LowCostDifferentialProbe repository on GitHub. It is a 2-layer board of 99.1 × 63.5 mm with 58 parts on 28 nets, routed with 207 tracks and 12 vias.
It is built around the LM4562NA, BC327 and BC337. Its parts include 20 resistors, 16 capacitors, 5 diodes, 3 ICs and 3 connectors. It belongs with the sensors and measurement boards of this library.
Main components
3
LM4562NA
PDIP-8-17V~-2.5V、2.5V~17V -40℃~+85℃ 0.00003% 10mA 120dB 2-Channel PDIP-8 Audio Amplifiers ROHSTexas InstrumentsAudio Amplifiers
BC327
TO-921 PNP 100MHz 45V 5V 625mW 630 700mV 800mA PNP TO-92 Bipolar (BJT) ROHSDDFBipolar (BJT)BC337
TO-92-31 NPN 100 100MHz 100nA 45V 5V 625mW 700mV 800mA NPN TO-92-3 Bipolar (BJT) ROHSFoshan Blue Rocket ElecBipolar (BJT)
Parts
58| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R11, R12, R13, R14, R16, R17, R18, R19 |
| 6 | 10p | Capacitor_SMD:C_1206_3216Metric | C3, C4, C5, C6, C7, C8 |
| 4 | 10MEG | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3, R4, R6, R7 |
| 4 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4 |
| 4 | 470n | Capacitor_SMD:C_1206_3216Metric | C11, C12, C13, C14 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 47 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R9, R10, R15 |
| 3 | LM4562NA | Package_DIP:DIP-8_W7.62mm | U1, U2, U3 |
| 3 | SW_SPDT | zCustom_Footprints:SPDT_1MS1T1B1M1QE | SW1, SW2, SW3 |
| 2 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1, C2 |
| 2 | 1MEG | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5, R8 |
| 2 | 470p | Capacitor_SMD:C_1206_3216Metric | C9, C10 |
| 2 | 5-20p | Capacitor_SMD:C_Trimmer_Voltronics_JZ | C15, C16 |
| 2 | Banana Plugs | zCustom_Footprints:BSM-410_BananaPlug | J1, J2 |
| 1 | 10k | Potentiometer_THT:Potentiometer_Vishay_T73XW_Horizontal | RV1 |
| 1 | 680 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R20 |
| 1 | BC327 | Package_TO_SOT_THT:TO-92_Inline | Q2 |
| 1 | BC337 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | BNC Connector | Connector_Coaxial:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal | J3 |
| 1 | Battery | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BT1 |
| 1 | LED GREEN | Diode_SMD:D_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D5 |
Questions
How big is the Differential Probe PCB?
It measures 99.1 × 63.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Differential Probe use?
58 parts, built around the LM4562NA, BC327 and BC337. 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 Differential Probe KiCad files?
From the tcfh2003/LowCostDifferentialProbe repository on GitHub, at the commit this page was made from: the board is Differential_Probe.kicad_pcb and its schematic Differential_Probe.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Differential Probe design in my own project?
Its repository states no licence, so its author keeps all rights: ask tcfh2003 before reusing the design.
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