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LEDTimer

tomikaa87·led-timer·Hardware/LEDTimer/LEDTimer.kicad_pcb

LEDTimer PCB layout, top view — open source PIC board by tomikaa87

About the LEDTimer PCB

LEDTimer is an open source PIC PCB design by tomikaa87, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 38 × 27.3 mm, with 28 components from 22 distinct parts.

Its main chip is the PIC16F18326, from the PIC family. Other key parts include the AP7383-36WW7, Display_128x64_096_I2C and BCR_421U_E6327. By type, the board carries 6 resistors, 4 ICs, 4 switches, 2 connectors, 2 jumpers and 2 capacitors.

It belongs with the displays & leds and power & battery designs in this gallery.

From the project

Programmable timer for low voltage LED lights (e.g. christmas LED strings) with a Microchip PIC16

This project is in work-in-progress state

A custom-made PCB and a 3D-printable enclosure is still in development and should be published soon.

I've made a simple 3D-printable case in FreeCAD. It's a two-part design which can be assembled using M2 self-tapping screws.

The first version of the PCB is a 4-layer design that can be manufactured for $2 at JLC PCB. It's almost as small as the 0.96" SSD1306 OLED display module itself. Because different display modules have varying pinouts (VDD and GND swapped), the function of the first two pins are configurable via solder jumpers (JP1 and JP2).…

LEDTimer, from the project README
From the project README

Main components on the LEDTimer

AP7383-36WW7PIC16F18326Display_128x64_096_I2CBCR_421U_E6327

LEDTimer bill of materials (BOM)

28 components, 22 distinct parts.

QtyPartRefs
1
AP7383-36WW7
U1
1
PIC16F18326
U2
1
Display_128x64_096_I2C
U3
1
BCR_421U_E6327
U4
1
S8050
Q1
1
32.768 kHz
Y1
1
LED
J2
1
PWR
J3
1
HU2032-LF
BT1
2
22p
CD1, CG1
1
OLED_PIN1
JP1
1
OLED_PIN2
JP2
1
220k
RD1
1
R_Potentiometer
RVext1
3
SW_Push
SW1, SW2, SW3
1
SW_PWR
SW4
1
BAT54C
D1
2
1u
C1, C2
1
47k
R1
1
100k
R2
Show 2 more
QtyPartRefs
2
10k
R3, R5
2
4k7
R4, R6

LEDTimer design files

The KiCad project lives in the tomikaa87/led-timer repository on GitHub; these links point at the commit this page was built from.

LEDTimer: common questions

What microcontroller does the LEDTimer use?

The LEDTimer is built around the PIC16F18326, from the PIC family.

How big is the LEDTimer PCB?

The LEDTimer measures 38 × 27.3 mm, has 4 copper layers and is 4.69 mm thick.

How many components are on the LEDTimer?

28 components, from 22 distinct parts. The full bill of materials is listed on this page.

Where can I download the LEDTimer design files?

From the tomikaa87/led-timer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the LEDTimer design in my own project?

Yes, under the terms of its GPL-3.0 license, which tomikaa87 chose for the repository.

Can I test firmware for the LEDTimer without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug PIC firmware against it before you order a PCB.

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