4 layers71 × 21.6 mm
EMGAmplifier
Arjun-Mahes/EMGAmplifier
made an EMG amplifier PCB from scratch that streams filtered raw and enveloped outputs wirelessly using an ESP32
63 parts
2 layers72.4 × 44.5 mm
MilliOhm Meter
Dirkmeister/MilliOhm-MeterMilliOhm - Meter PCB based on Scullcons MilliOhm-Meter Design
- Size
- 72.4 × 44.5 mm
- Copper layers
- 2
- Thickness
- 1.31 mm
- Parts
- 43
- Nets
- 59
- Pads
- 130
- Tracks, vias
- 227, 60
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 31 Mar 2024
- Updated
- 18 Apr 2024
Overview
MilliOhm Meter is an open-source printed circuit board by Dirkmeister, from the Dirkmeister/MilliOhm-Meter repository on GitHub. It is a 2-layer board of 72.4 × 44.5 mm with 43 parts on 59 nets, routed with 227 tracks and 60 vias.
It is built around the INA106U and MAX680CPA+. Its parts include 11 capacitors, 8 resistors, 5 ICs, 1 connector and 1 switch.
Main components
2
INA106U
SOIC-8-40℃~+85℃ 0.2uV/℃ 20uV 50V/us 86dB Capacitive load driving、Integrated precision resistor network、Current limiting / short-circuit protection Single-channel SOIC-8 Differential Amplifiers ROHSTexas InstrumentsDifferential Amplifiers
MAX680CPA+
DIP-8DIP-8 Charge Pumps ROHSMaxim Integrated (Analog Devices)Charge Pumps
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | Conn_01x01_Pin | Connector_Wire:SolderWire-0.5sqmm_1x01_D0.9mm_OD2.1mm | Current-, Current+, J6, J7, Sense-, Sense+, VO-, VO+ |
| 6 | 0.1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C3, C4, C5, C11 |
| 4 | 22uF | Capacitor_THT:CP_Radial_Tantal_D5.5mm_P2.50mm | C7, C8, C9, C10 |
| 4 | 56R2 | PCM_Resistor_SMD_AKL:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1, R2, R3, R4 |
| 4 | M2 | MountingHole:MountingHole_2.2mm_M2_Pad_Via | H1, H2, H3, H4 |
| 2 | 0R | PCM_Resistor_SMD_AKL:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | 0R, R10 |
| 1 | - 9V in + | Connector_Wire:SolderWire-0.5sqmm_1x02_P4.6mm_D0.9mm_OD2.1mm | J1 |
| 1 | 100K | PCM_Potentiometer_THT_AKL:Potentiometer_Bourns_3296W_Vertical | RV100K |
| 1 | 100R | PCM_Potentiometer_THT_AKL:Potentiometer_Bourns_3296W_Vertical | RV100R |
| 1 | 100R | PCM_Resistor_SMD_AKL:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R9 |
| 1 | 10r | PCM_Resistor_SMD_AKL:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R7 |
| 1 | 220uF | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C6 |
| 1 | 499K | PCM_Resistor_SMD_AKL:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R8 |
| 1 | 63R4 | PCM_Resistor_SMD_AKL:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R5 |
| 1 | INA106U | PCM_Package_SO_AKL:SO-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | LT1634-1.25 | Package_SO:SO-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | LT3092xST | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | MAX680CPA+ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | PTC 250mA | Capacitor_THT:C_Disc_D7.5mm_W2.5mm_P5.00mm | F1 |
| 1 | SW_SPST | Connector_Wire:SolderWire-0.1sqmm_1x02_P3.6mm_D0.4mm_OD1mm | SW1 |
| 1 | ~ | Package_TO_SOT_SMD:SOT-223 | U1 |
Questions
How big is the MilliOhm Meter PCB?
It measures 72.4 × 44.5 mm and has 2 copper layers, 1.31 mm thick.
What parts does the MilliOhm Meter use?
43 parts, built around the INA106U and MAX680CPA+. 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 MilliOhm Meter KiCad files?
From the Dirkmeister/MilliOhm-Meter repository on GitHub, at the commit this page was made from: the board is PCB/MilliOhm Meter/MilliOhm Meter.kicad_pcb and its schematic PCB/MilliOhm Meter/MilliOhm Meter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MilliOhm Meter design in my own project?
Its repository states no licence, so its author keeps all rights: ask Dirkmeister before reusing the design.
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