Uploaded August 2013 | Updated September 2026, 1 week ago
Music: Drops of H2O ( The Filtered Water Treatment ) by J.Lang (CC BY 3.0) ccmixter.org/files/djlang59/37792
This is 32x time lapse of etching a PCB using sodium persulfate (Natriumpersulfat).
50g Na2S2O8 + 250g hot water.
It was kind of slow this time. I guess the water could be hotter. Recommendation is 50°C. I got once faster results using almost boiling water.
I used toner transfer and supported some thin parts using a marker.
The PCB is a breadboard fanout for the HM-10 BLE module with TI CC2540 chip. Subscribe my channel to see some applications using Bluetooth in future.
Music: Drops of H2O ( The Filtered Water Treatment ) by J.Lang (CC BY 3.0) ccmixter.org/files/djlang59/37792
This is 32x time lapse of etching a PCB using sodium persulfate (Natriumpersulfat).
50g Na2S2O8 + 250g hot water.
It was kind of slow this time. I guess the water could be hotter. Recommendation is 50°C. I got once faster results using almost boiling water.
I used toner transfer and supported some thin parts using a marker.
The PCB is a breadboard fanout for the HM-10 BLE module with TI CC2540 chip. Subscribe my channel to see some applications using Bluetooth in future.
![LED Matrix Lamp made with a Budget 3D Printer [ANet ET4+]](https://i.ytimg.com/vi/enSusqJBnFk/mqdefault.jpg "LED Matrix Lamp made with a Budget 3D Printer [ANet ET4+]
This video shows a short test of the ANet ET4+ 3D Printer. It provides some cool features that allow continuing after power off and changing the filament mid-print. I tested the filament change to print a functional lamp case for a simple 16x16 pixel RGB LED matrix. The lamp is driven by the ESP8266 and WLED. It can be controlled over WiFi and used for several IoT purposes.
Build instructions: https://bitluni.net/led-matrix-lamp
The Youth-Center: http://www.juze-graben-neudorf.de/
The ANet Pritners (all free & fast shipping from local stock)
ET4: $151 https://aliexpress.bitluni.net/ANetET4
ET4 Pro: $191 https://aliexpress.bitluni.net/ANetET4Pro
ET5: $266 (EU & Russia) https://link.bitluni.net/ANetET5
A8 Plus: $161 https://aliexpress.bitluni.net/AnetA8
Links to the parts (affiliate links):
Flexible RGB LED Matrix ($13): https://aliexpress.bitluni.net/flexRGB
ESP8266 D1 Mini: https://aliexpress.bitluni.net/d1mini
Power Supply: https://aliexpress.bitluni.net/ACtoDCBarrel
5.5mm Barrel Jack: https://aliexpress.bitluni.net/barrelJack
5.5mm Barrel Jack solderless: https://aliexpress.bitluni.net/screwBarrel
My camera and lens (4k 60fps):
https://amazon.bitluni.net/gh5
Zoom H6 Audio Recorder:
https://amazon.bitluni.net/h6
plz share :-)
Tindie store: https://www.tindie.com/stores/bitluni
Github Sponsors: https://github.com/sponsors/bitluni
Patreon: https://www.patreon.com/bitluni
Channel membership: https://www.youtube.com/channel/UCp_5PO66faM4dBFbFFBdPSQ/join
Paypal: https://paypal.me/bitluni
Twitter: @bitluni
reddit: u/bitluni
Discord: https://discord.gg/MT5RbJt
Music:
Jeremy Blake - Powerup!
Quincas Moreira - Sparse Clouds
Aaron Lieberman - My Peeps
Corbyn Kites - Birds
Lish Grooves - Pitch
#electronics #LED #3dprinting")
![Im a power hoarder now! [Oukitel P5000, Tibber]](https://i.ytimg.com/vi/grCqUBDBAX0/mqdefault.jpg "Im a power hoarder now! [Oukitel P5000, Tibber]
I tested the plan to utilize hourly ETEX power market prices to minimize my power costs. As power storage I tested the Oukitel ABEARL P5000 Power Station. The 120V MPPT solar inverter turned out to be the MVP.
- Oukitel ABEARL P5000: https://amazon.bitluni.net/5kWh (ad)
Coupon: 400euros off. 8% off Discount code: QGRHK4F2
- Tibber referral link 50€ bonus: https://link.bitluni.net/tibber
- Spreadsheet: https://link.bitluni.net/batterySheet
- Interesting paper: https://iopscience.iop.org/article/10.1149/1945-7111/abae37/pdf
- Electricity map https://app.electricitymaps.com/map
Links to parts and tools (affiliate links):
- Thermal Camera InfiRay P2Pro ($20 coupon: bitluni):
https://amazon.bitluni.net/P2pro
https://aliexpress.bitluni.net/P2pro
- BALKONKRAFTWERK: https://aliexpress.bitluni.net/gridTieShop
- My camera and lens (4k 60fps): https://amazon.bitluni.net/gh5
- Drone DJI Mini 3 pro: https://amazon.bitluni.net/drone
- Zoom H6 Audio Recorder: https://amazon.bitluni.net/h6
Github Sponsors: https://github.com/sponsors/bitluni
Patreon: https://www.patreon.com/bitluni
Channel membership: https://www.youtube.com/channel/UCp_5PO66faM4dBFbFFBdPSQ/join
Paypal: https://paypal.me/bitluni
Twitter: @bitluni
reddit: u/bitluni
Discord: https://discord.gg/MT5RbJt
0:00 Intro
0:44 Hourly Market Rates
2:02 Power Station
2:38 Microinverter
3:00 Power station tests
4:05 UPS Mode
5:02 Range Extender
6:12 Capacity Test
7:00 MPPT Charge Controller
8:35 Cost/Savings Calculations
10:48 Solar+Storage
11:39 Conclusion
#electronics #balkonkraftwerk")
![Mallets Bot DIY Instrument V1.0 [Ardunio, MIDI]](https://i.ytimg.com/vi/hWSprtJcZiE/mqdefault.jpg "Mallets Bot DIY Instrument V1.0 [Ardunio, MIDI]
This project shows how to build a simple instrument which plays music on wine glasses. It can be used with a keyboard to play live or playback midi files from your computer.
Project page (work in progress, come back later :-*):
http://bitluni.net/mallets-bot/
Code and models:
https://github.com/bitluni/MalletsBot
Links to the cheep parts including shipping (affiliate links):
Arduino Pro Micro
$3.60 Aliexpress http://s.click.aliexpress.com/e/N7Mrfi6
$4.04 Ebay US https://ebay.to/2LsS4qO
Solenoid 12V:
$2.49 Aliexpress http://s.click.aliexpress.com/e/UBMrRZB
$2.66 Ebay UShttps://ebay.to/2NDToog
PWM Shield:
$1.58 Aliexpress http://s.click.aliexpress.com/e/F6iyFyv
$2.31 Ebay US https://ebay.to/2uPKnSf
FET Module PWM 4-Channel
$4.66 Aliexpress http://s.click.aliexpress.com/e/7IAUrBm
$4.98 Ebay US https://ebay.to/2NGvMPZ
LiPo 3S:
Ebay US https://ebay.to/2NyNggQ
Amazon US https://amzn.to/2JRrAuj
Siglent Oscilloscope:
Amazon US https://amzn.to/2uN6Hf0
plz share :-)
Consider supporting our work on Patreon for some extras:
https://www.patreon.com/bitluni
We are also thankful for any donation on PayPal:
https://paypal.me/bitluni
Twitter: @bitluni
reddit: r/bitluni")
![Developing SMT VGA Shields for the ESP32 [TinyPICO, ESP32Lib, Raytracing]](https://i.ytimg.com/vi/iGzUhgsmJL4/mqdefault.jpg "Developing SMT VGA Shields for the ESP32 [TinyPICO, ESP32Lib, Raytracing]
This video is showing the development of a VGA shield with SMT components
JLCPCB Prototype for $2(Any Color): https://jlcpcb.com
My tindie shop: https://www.tindie.com/stores/bitluni/
Unexpected Makers Tiny PICO campaign:
https://www.crowdsupply.com/unexpected-maker/tinypico
https://www.tinypico.com/
The ESP32Lib:
https://github.com/bitluni/ESP32Lib (but you should get it from the Arduino Library Manager)
Maker Cast:
https://youtu.be/T81_68nyvGk
Links to the parts (affiliate links):
Low temp solder paste $4:
http://s.click.aliexpress.com/e/bsRhbcY0
Crappy reflow oven:
https://ebay.to/2IgmSaR
plz share :-)
Consider supporting my lab on Patreon for some extras and frequent updates:
https://www.patreon.com/bitluni
Im also thankful for any donation on PayPal:
https://paypal.me/bitluni
Twitter: @bitluni
reddit: r/bitluni
#electronics #diy #vga")
