arduino - Use a PC123 optocoupler for MIDI input - Electrical ...
2015年10月17日 · The MIDI specification calls for a high-speed optocoupler. which the PC123 is not. At the 5 mA specified for the MIDI current loop, the PC123 has a guaranteed current …
mains - Does this optocoupler circuit work practically? - Electrical ...
2020年8月25日 · Here's a quick simulation in LTspice: So if you want a relay afterwards, you could use it, since the voltage across the cap, even if not zero, will be, most probably, below …
opto isolator - how do I use H11L1 correctly to receive MIDI ...
2019年3月28日 · Figure 1. LED IV curves. Source: LED current-voltage relationship. Your opto-coupler uses an infrared LED. When you connect this directly in parallel with any other colour …
MIDI to Arduino with a 4N38 Optocoupler
2015年5月24日 · At 31250 baud, one bit has a length of 32 µs. For reliable operation, the raise/fall times of your optocoupler's output must be much less than that; the MIDI specification …
serial - MIDI IN - MIDI IN : many circuits - Electrical Engineering ...
2015年4月17日 · I'm building a MIDI IN to serial port RX cicruit (for Raspberry Pi, or Arduino, or anything else...) using a 6N138 optoisolator. But I find many different circuits, I don't know why …
Is it possible to build MIDI to relays controller?
2016年10月26日 · I have MIDI keyboard (MIDI interface, not MIDI through USB) and want to make it to control 12 colored lights (LEDs probably as incandescent bulbs may not be fast …
opto isolator - AC Optocoupler for 230V line detection - Electrical ...
2018年4月11日 · Where I use to work at we detected 230 VAC with a 4 pin H11AA814 AC optocoupler. Use a 220K 1/4W resistor to get 1.045 mA of current at 0.24 watts, which is …
arduino - MOSFET switch using an optocoupler - Electrical …
With the parts in the mail, haven't had the time to test, but the simple question: will this work, or what improvements are needed? What it's supposed to do: a MOSFET switch for 12V, 0.5-3A …
MOSFET as a switch? - Electrical Engineering Stack Exchange
2013年4月27日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
How do I do a basic MOSFET wiring? [closed]
2017年1月27日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …