HardLabs

POV-Globe

Mikail-Sadic-UT·POV-Globe·Hardware/ECE445L_Lab7.kicad_pcb

POV-Globe PCB layout, top view — open source ESP8266 board by Mikail-Sadic-UT
Simulate this board

About the POV-Globe PCB

POV-Globe is an open source ESP8266 PCB design by Mikail-Sadic-UT, published on GitHub. It is a 2-layer board measuring 83.6 × 86.6 mm, with 95 components from 48 distinct parts.

Its main chip is the ESP8266-1, from the ESP8266 family. Other key parts include the LM2937ET-3.3/NOPB, LM4041CILPR, TLV5616, LM4890M/NOPB and EK-TM4C123GXL. By type, the board carries 37 capacitors, 24 resistors, 10 ICs, 8 connectors, 5 test points and 4 diodes.

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

From the project

Globe

A persistence-of-vision LED globe. A blade carrying a strip of SK9822 LEDs spins on a brushless motor; image columns are clocked out in sync with the motor's hall sensor so a stable spherical image hangs in mid-air.

A hall sensor feeds back the motor's rotation period. A timer divides that period across the number of angular columns and fires at that rate — each tick, the next column of image data is pushed out to the LEDs via DMA while the CPU stays free.

POV-Globe, from the project README
From the project README

Main components on the POV-Globe

LM2937ET-3.3/NOPBLM4041CILPRTLV5616LM4890M/NOPBEK-TM4C123GXLLMR51635XFDDCRTPS56628DDARESP8266-1Adafruit ST7735R74AXP2T45DCH

POV-Globe bill of materials (BOM)

95 components, 48 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM2937ET-3.3/NOPB
LM2937ET-3.3_NOPB
IC1
1
LM4041CILPR
Texas Instruments
IC2
1
TLV5616
Texas Instruments
IC3
1
LM4890M/NOPB
LM4890M_NOPB
IC4
1
EK-TM4C123GXL
Texas Instruments
U1
1
LMR51635XFDDCR
U2
1
TPS56628DDAR
U3
1
ESP8266-1
U4
1
Adafruit ST7735R
Adafruit
U5
1
74AXP2T45DCH
U6
1
MIC
J1
1
PWR_IN
J2
2
LED
J3, J7
1
Motor
J4
1
AudioJack
J5
1
12V
J8
1
5V
J9
1
3568
F2
1
Speaker
LS1
1
SW1
SW1
Show 28 more
QtyPartRefs
1
SW2
SW2
1
SW3
SW3
5
TestPoint
TP1, TP2, TP5, TP6, TP7
1
Schottcky?
D1
3
LED
D2, D3, D4
1
15uH
L1
1
3.3uH
L2
9
10uF
C1, C3, C7, C13, C14, C25, C27, C29 +1
1
2.2uF
C2
13
0.1uF
C4, C6, C8, C12, C16, C17, C20, C21 +5
7
1uF
C5, C15, C19, C30, C33, C34, C39
3
22uF
C9, C10, C11
1
10nF
C18
3
680uF
C26, C31, C36
1
56k
R1
6
10k
R2, R4, R10, R13, R16, R17
1
100k
R3
2
120k
R5, R8
1
20k
R6
1
22k
R7
1
3.9k
R9
2
2k
R11, R15
1
47k
R12
1
30k
R14
4
51
R18, R19, R22, R23
1
5.1k
R20
1
1500
R21
1
6.5k
R24

POV-Globe design files

The KiCad project lives in the Mikail-Sadic-UT/POV-Globe repository on GitHub; these links point at the commit this page was built from.

POV-Globe: common questions

What microcontroller does the POV-Globe use?

The POV-Globe is built around the ESP8266-1, from the ESP8266 family.

How big is the POV-Globe PCB?

The POV-Globe measures 83.6 × 86.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the POV-Globe?

95 components, from 48 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 POV-Globe design files?

From the Mikail-Sadic-UT/POV-Globe 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 POV-Globe design in my own project?

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

Can I test firmware for the POV-Globe without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

Similar boards