2 layers71.1 × 95.3 mm
2 layers39 × 28 mm
Lcsys
mora200217/lcsysSensor de nivel capacitivo. Practica 2 Sensores y actuadores
- Size
- 39 × 28 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 5
- Nets
- 51
- Pads
- 55
- Tracks, vias
- 18, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 May 2025
- Updated
- 30 May 2025
Overview
Lcsys is an open-source printed circuit board by mora200217, from the mora200217/lcsys repository on GitHub, published under the MIT licence. It is a 2-layer board of 39 × 28 mm with 5 parts on 51 nets, routed with 18 tracks and 0 vias.
It is built around the PIC18F4550-I/PT. Its parts include 2 resistors, 2 ICs and 1 connector. It belongs with the PIC boards of this library.
Main components
1README
README.mdlcsys
Sensor de nivel capacitivo. Practica 2 Sensores y actuadores
Elemento primario de medida
=======
Spice sim
Aquí se encuentran las simulacion en LTspice de los subcircuitos solicitados. Sientanse libres de modificar los parámetros para probar sus diseños y comparar con los valores experimentales
Circuito oscilador de Wien
Es un puente Resito-capacitivo que genera una onda senoidal como señal de salida. Permite se usado como fuente alterna a baja tensión, o como un modulador de frecuencia.
$$ f_0 = \frac{1}{2\pi RC} $$
Con las siguientes recomendaciones de estabilidad
$$ \frac{Ra}{Rb} \approx 2 \hspace{20pt} R \gt 1~\text{k}\Omega $$
LM331
Circuito integrado (IC) conversor de tensión-frecuencia y viscecersa. Nos permitirá extraer la modulación de frecuencia fruto del cambio de capacitancia del sensor, a una señal de tensión que podamos digitalizar. Buscamos que la respuesta sea lo más lineal posible.
Parts
5| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1, R2 |
| 1 | Conn_01x03_Pin | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J1 |
| 1 | LM741 | Package_DIP:DIP-8_W7.62mm_LongPads | U1 |
| 1 | PIC18F4550-IP | Package_DIP:DIP-40_W15.24mm | U2 |
Questions
How big is the Lcsys PCB?
It measures 39 × 28 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lcsys use?
5 parts, built around the PIC18F4550-I/PT. 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 Lcsys KiCad files?
From the mora200217/lcsys repository on GitHub, at the commit this page was made from: the board is kicad/circuit/circuit.kicad_pcb and its schematic kicad/circuit/circuit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lcsys 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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