2 layers51 × 71 mm
2 layers69.9 × 58.4 mm
Constant current
TimGoll/pcb_constantcurrent- Size
- 69.9 × 58.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 36
- Pads
- 96
- Tracks, vias
- 171, 279
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 13 Apr 2021
- Updated
- 13 Apr 2021
Overview
Constant current is an open-source printed circuit board by TimGoll, from the TimGoll/pcb_constantcurrent repository on GitHub. It is a 2-layer board of 69.9 × 58.4 mm with 39 parts on 36 nets, routed with 171 tracks and 279 vias.
It is built around the TLV431ASN, BC847C and BC857C. Its parts include 17 resistors, 11 transistors, 3 connectors and 2 ICs.
Main components
3
TLV431ASN
TSOP-5-1.5mm-40℃~+85℃@(Ta) 1.24V~16V 150nA 20mA 80uA Adjustable Parallel ±1% TSOP-5-1.5mm Voltage Reference ROHSonsemiVoltage Reference
BC847C
SOT-23-55℃~+150℃ 1 NPN 100MHz 100mA 100nA 200mW 420 45V 500mV 6V NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)BC857C
SOT-23-65℃~+150℃ 1 PNP 100MHz 100mA 15nA 250mV 250mW 420 45V 5V PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R2, R5, R6, R8, R9, R11, R12, R14, R15, R17 |
| 7 | BC847C | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q1, Q2, Q3, Q5, Q7, Q8, Q10 |
| 5 | 62R | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3, R7, R10, R13, R16 |
| 4 | BC857C | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q4, Q6, Q9, Q11 |
| 2 | tlv431 | Package_TO_SOT_SMD:SOT-23_Handsoldering | U1, U2 |
| 1 | 150R | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4 |
| 1 | LED | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | LED |
| 1 | LED_A | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | LED A |
| 1 | LED_B | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | LED B |
| 1 | LED_C | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | LED C |
| 1 | LED_D | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | LED D |
| 1 | LED_R | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | LED |
| 1 | conn_in | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | enb | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | ~enb | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
Questions
How big is the Constant current PCB?
It measures 69.9 × 58.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Constant current use?
39 parts, built around the TLV431ASN, BC847C and BC857C. 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 Constant current KiCad files?
From the TimGoll/pcb_constantcurrent repository on GitHub, at the commit this page was made from: the board is constant_current/constant_current.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Constant current design in my own project?
Its repository states no licence, so its author keeps all rights: ask TimGoll before reusing the design.
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