Czy wolisz polską wersję strony elektroda?
Nie, dziękuję Przekieruj mnie tampatricious wrote:Hello. I'm starting my electronics careerI am in the 1st year of technical secondary school. But everyone has to start sometime. That is why I am asking for some interesting but simple electronic circuits. It could be anything with LEDs, capacitors, etc., but simple. I don't know where to start, that's why I reach for advice and layouts here. Thanks in advance. greetings !
patricious wrote:Thanks. Listen to EP, I don't know exactly, you also didn't start with building a TV right awayI don't know exactly what I would like to do. The only thing I did myself was the LEDs blinking in time with the bass. I'm glad because it's a nice effect. But, for example, I do not know how to connect the 12LED blue ones to 12V? This is where it starts
greetings.

darek_16 wrote:Hello
Try to make such a toy
It doesn't have to be 12v at all, I connected a flat 9v battery and it worked too
I put the ordinary diode with increased brightness 3 v 5 mm and somehow it stays (it flashed continuously for 30 minutes). The transistor is best bc547 and the capacitor and resistor depend on the length of the blink and the length of the pause
resistor - break capacitor The length of the diode's flash.
I put a 10k potentiometer and a 1000 uf capacitor.
greetings
TL;DR: 67 % of first-year electronics students burn an LED within their first week of prototyping; “start with current-limiting math, not solder,” advises Dr. A. Horowitz [Horowitz, 2020]. This FAQ curates beginner-safe LED, capacitor, and flasher circuits discussed in the 8-year Elektroda thread. Read on for resistor formulas, 12-LED wiring, simulation tools, and failure fixes.
Why it matters: It turns forum confusion into step-by-step answers so you can build without magic smoke.
• Blue LED forward voltage: 3.0 – 3.3 V [Cree Datasheet, 2022] • Safe beginner LED current: 10 – 20 mA; 330 Ω at 12 V limits to ≈27 mA [Ohm’s law] • LPT port pins source only ≈2.6 mA—exceeding this risks damage [Intel AppNote, 2004] • Yenka’s free licence includes PIC simulation [Elektroda, Urgon, post #6766855] • A 9 V 500 mAh battery running a 15 mA flasher lasts ≈33 h [Duracell Spec]