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Jan 26, 2026
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Programmable 24×8 LED Matrix Nametag

This is a wearable LED nametag made from three 8×8 LED matrices driven by MAX7219 chips and a microcontroller. It can display scrolling text, animations, or patterns, and it’s fully programmable.

Why I Made This

I’m building it mostly for fun and to wear at events like FRC events or whenever, but also to learn more about PCB design, LED drivers, and embedded programming. Made possible by Hack Club's Blueprint program :D

Usage

To use this nametag, first plug it into a PC or laptop. Next, take the firmware.c file and use that as a base to create the scrolling text you want to display. Finally, flash your firmware to the nametag and turn it on!

Concept (In MS Paint of course...)

Screenshot 2026-01-22 180604

PCB Schematic

schem

PCB

Screenshot 2026-01-25 014315

Case

Screenshot 2026-01-25 212958

3D Model

Screenshot 2026-01-25 014249 Screenshot 2026-01-25 014238

BOM

Final price: About $57.25

Item # Item Name Description Link Unit Price Amount Total Price Need to buy?
ATtiny85-20PU 8-bit AVR MCU, 8KB Flash, DIP-8 https://www.aliexpress.us/item/3256807270306075.html?spm=a2g0o.productlist.main.1.41eb1085uJSiS2&algo_pvid=a2a254a3-b015-448a-bc23-851408c95b2d&algo_exp_id=a2a254a3-b015-448a-bc23-851408c95b2d-0&pdp_ext_f=%7B%22order%22%3A%22654%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&pdp_npi=6%40dis%21USD%2111.40%210.99%21%21%2178.81%216.84%21%4021032f3717694473649787151ec410%2112000040832782031%21sea%21US%210%21ABX%211%210%21n_tag%3A-29910%3Bd%3A90ddd51c%3Bm03_new_user%3A-29895%3BpisId%3A5000000197821854&curPageLogUid=TDwNkzq9CoNJ&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005007456620827%7C_p_origin_prod%3A0827%7C_p_origin_prod%3A $1.66 1 $1.66 Yes
1 MAX7219CNG LED matrix driver, SPI, DIP-24 https://www.aliexpress.us/item/2251832688221567.html?spm=a2g0o.productlist.main.3.6570152cxDC9QZ&algo_pvid=f7c92be4-6373-4814-8576-f89ad800f142&algo_exp_id=f7c92be4-6373-4814-8576-f89ad800f142-2&pdp_ext_f=%7B%22order%22%3A%2225%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&pdp_npi=6%40dis%21USD%213.18%210.99%21%21%213.18%210.99%21%402103128817694470253163013e85cd%2165545198192%21sea%21US%210%21ABX%211%210%21n_tag%3A-29910%3Bd%3A90ddd51c%3Bm03_new_user%3A-29895%3BpisId%3A5000000197821852&curPageLogUid=VqmjIbF5sB53&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A32874536319%7C_p_origin_prod%3A6319%7C_p_origin_prod%3A 5 for $0.99 1 $1.00 Yes
2 8×8 LED Matrix 8x8 32mmx32mm led matrix https://www.aliexpress.us/item/3256808672060623.html?src=google&pdp_npi=4%40dis%21USD%210.55%210.52%21%21%21%21%21%40%2112000046972045693%21ppc%21%21%21&gatewayAdapt=glo2usa=glo2usa $0.99 3 $2.97 Yes
3 TPS61023 MiniBoost 5V Boost converter breakout board https://www.aliexpress.us/item/3256810593729796.html?spm=a2g0o.productlist.main.2.67e458c2ZYlXA5&algo_pvid=5188189e-f9cc-400f-ac00-8eda30de4720&algo_exp_id=5188189e-f9cc-400f-ac00-8eda30de4720-1&pdp_ext_f=%7B%22order%22%3A%222%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&pdp_npi=6%40dis%21USD%218.10%211.55%21%21%2156.03%2110.73%21%40210319b717694479852245471ee8d5%2112000053486443154%21sea%21US%210%21ABX%211%210%21n_tag%3A-29910%3Bd%3A8270939c%3Bm03_new_user%3A-29895%3BpisId%3A5000000197847434&curPageLogUid=Ooosq97KCL2e&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005010780044548%7C_p_origin_prod%3A4548%7C_p_origin_prod%3A $3.95 1 $3.95 Yes
4 2P JST 2.0 plug Plug for battery https://www.aliexpress.us/item/3256804769340392.html?spm=a2g0o.productlist.main.7.23f328c0Ldasga&algo_pvid=0b9d2df8-2da1-4804-b964-1863d0971dd9&algo_exp_id=0b9d2df8-2da1-4804-b964-1863d0971dd9-6&pdp_ext_f=%7B%22order%22%3A%221104%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&pdp_npi=6%40dis%21USD%211.07%210.99%21%21%211.07%210.99%21%402101ea8c17694475110711960e7738%2112000031146362162%21sea%21US%210%21ABX%211%210%21n_tag%3A-29910%3Bd%3A90ddd51c%3Bm03_new_user%3A-29895%3BpisId%3A5000000197821833&curPageLogUid=Ls4lcUbmq5DM&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005004955655144%7C_p_origin_prod%3A5144%7C_p_origin_prod%3A $0.99 1 $0.99 Yes
5 UJC-HP-3-SMT-TR USB C plug https://www.digikey.com/en/products/detail/same-sky-formerly-cui-devices/UJC-HP-3-SMT-TR/12173295 $1.04 1 $1.04 Yes
6 SMD LED Indication LED https://www.aliexpress.us/item/3256803260597975.html?gatewayAdapt=glo2usa4itemAdapt $1.68 1 $1.68 Yes
7 EG1218 switch Power switch https://www.aliexpress.us/item/3256806678025361.html?gatewayAdapt=glo2usa4itemAdapt $0.99 1 $0.99 Yes
8 1k resistor 1k ohm resistor https://www.digikey.com/en/products/detail/stackpole-electronics-inc/CF14JT1K00/1741314 $0.10 1 $0.10 No
9 5.1k resistor 5.1k ohm resistor https://www.digikey.com/en/products/detail/stackpole-electronics-inc/CF14JT5K10/1741447 $0.10 2 $0.20 No
10 10k resistor 10k ohm resistor https://www.digikey.com/en/products/detail/stackpole-electronics-inc/CF14JT10K0/1741265 $0.10 2 $0.20 No
11 26k resistor 26k ohm resistor https://www.digikey.com/en/products/detail/yageo/MFP50SBBE52-26K/9127454 $0.10 3 $0.30 No
12 0.1uf capacitor 0.1uf capacitor https://www.digikey.com/en/products/detail/kemet/C1206Y104K9RACTU/5879215 $0.54 4 $2.16 Yes
13 4.7uf capacitor 4.7uf capacitor https://www.digikey.com/en/products/detail/kemet/C1206C475K9RACTU/1090856 $0.51 2 $1.02 Yes
14 PCB PCB https://jlcpcb.com/ $5.00 1 $5.00 Yes
15 LiPo Battery Lipo Battery https://www.aliexpress.us/item/3256810542367531.html?spm=a2g0o.productlist.main.2.12401028luzreS&algo_pvid=bae1ea3f-c16b-4646-9365-e29a083acc34&algo_exp_id=bae1ea3f-c16b-4646-9365-e29a083acc34-1&pdp_ext_f=%7B%22order%22%3A%2241%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&pdp_npi=6%40dis%21USD%2118.14%2111.61%21%21%21125.47%2180.30%21%402101eee917694586032644403eb164%2112000053330147220%21sea%21US%217121669815%21ABX%211%210%21n_tag%3A-29910%3Bd%3A8270939c%3Bm03_new_user%3A-29895&curPageLogUid=ZrEdYz7mh8Rc&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005010728682283%7C_p_origin_prod%3A2283%7C_p_origin_prod%3A $11.61 1 $11.61 Yes
Shipping cost Digikey $9.25
Shipping cost AliExpress $5.82
Shipping cost JLCPCB $7.30
Total Price $57.24

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