Jul 11, 2019 · I'm trying to figure out how to create a driver for a led from the GPIO pins of the raspberry and a NPN 2N3904 transistor. I am currently following what seems to be a good …

Aug 9, 2015 · I've been reading up on LED drivers and found some common connection schemes. Yet, I recently came across the following LED driver circuit at this URL: I tried to find …

Nov 7, 2024 · 0 This drawing was made for LED lighting fixtures. The fixtures will operate at 230V and have a power factor of >0.95. The current in each branch should be around 2-3 amperes. …

Jun 22, 2023 · I’m trying to design a IR remote controller. I tried to design IR LED driver. I designed this circuit for IR driver. I used ESP8266 for first test for IR LED. I used though-hole …

Aug 14, 2021 · 0 I'd like to design a circuit that utilizes a small 1.3" LCD display with maximum LED backlight forward current of 40 mA. Since I'd like to use brightness control, I am hesitating …

Dec 6, 2016 · Which transistor pair would be good to drive a 3 W LED in push-pull? How do I calculate the resistors specifically for the LED (3.5 V, 700 mA)? What type of power supply …

Jun 14, 2019 · 5 I am driving a red LED with a forward voltage of approx. 2 V as shown in the picture. The driving signal comes from a microcontroller with a logic HIGH of 1.8 V. The LED is …

Jan 6, 2024 · An LED requires a minimum voltage before it will turn on at all. This voltage varies with the type of LED, but is typically in the neighborhood of 1.5V - 4.4V. Once this voltage is …

Dec 30, 2020 · I think I get it right so far (I hope.) Now I am trying to turn on/off the LED using a 2N2222A NPN transistor: simulate this circuit I looked it up online and find most people …

Here is the drawing of a LED driving circuit. The problem I have encountered with traditional resistor circuit is that I need a very precise current to run through that LED so it produces the …