HardLabs

Alternating led heart

elamrobert443·alternating-led-heart-pcb·kicad/surelythiswillbefixed.kicad_pcb

Alternating led heart PCB layout, top view — open source board by elamrobert443

About the Alternating led heart PCB

Alternating led heart is an open source PCB design by elamrobert443, published on GitHub. It is a 2-layer board measuring 122.6 × 112.1 mm, with 64 components from 19 distinct parts.

Other key parts include the C305904. By type, the board carries 27 resistors, 21 diodes, 6 test points, 4 capacitors, 3 transistors and 1 IC.

It belongs with the power & battery and test & measurement designs in this gallery.

From the project

Custom KiCad PCB featuring alternating red and white LED arrays driven by a 555 timer and transistor switching circuits.

A custom heart-shaped PCB designed as a Mother's Day gift.

- Heart-shaped PCB - Red LED bank forming an "M" - White perimeter LED bank - Alternating blinking effect (see video in the "media" folder) - 555 timer oscillator - BJT inverter for complementary signals - MOSFET and BJT LED switching circuits - 4xAAA battery power supply - Custom 3D-printed stand

In the event that debugging the board was required, multimeter test points were added to relevant points in each net, but I never ended up needing to use them beyond checking continuity before plugging in the batteries. Including the test…

Main components on the Alternating led heart

C305904

Alternating led heart bill of materials (BOM)

64 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C305904
NE555P
U1
1
PN2222A
Q1
1
AO3400A
Q2
1
PN2222A
Q3
1
C709041
AAA x4
BT1
1
C221829
SW_SPST
SW1
6
TestPoint_Probe
TP1, TP2, TP3, TP4, TP5, TP6
10
C74067
LED
D1, D2, D3, D4, D5, D6, D7, D8 +2
11
C87271
LED
D11, D12, D13, D14, D15, D16, D17, D18 +3
2
10UF
10uF
C1, C4
1
10NF
10nF
C2
1
0.1UF
0.1uF
C3
2
10K
R1, R26
1
70K
R2
10
330
R3, R4, R5, R6, R7, R8, R9, R10 +2
11
270
R13, R14, R15, R16, R17, R18, R19, R20 +3
1
360
R24
1
100
R25
1
2.2K
R27

Alternating led heart design files

The KiCad project lives in the elamrobert443/alternating-led-heart-pcb repository on GitHub; these links point at the commit this page was built from.

Alternating led heart: common questions

How big is the Alternating led heart PCB?

The Alternating led heart measures 122.6 × 112.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Alternating led heart?

64 components, from 19 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Alternating led heart design files?

From the elamrobert443/alternating-led-heart-pcb repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Alternating led heart design in my own project?

The repository has no license, so all rights stay with elamrobert443. Use it as a reference, and ask the author before reusing the design.

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