Hard drive indicator light10/5/2023 ![]() ![]() There's only one activity led for hard drives, because it's basically a signal coming from the sata controller, not directly from drives. The transistor can be generic, cheap 10-20 cents one, just must be able to turn on at less than 5v and be able to let the led strip's current pass through (200mA to something more) ![]() So when the led is supposed to turn on, there's energy sent into the base of the transistor, which creates a connection between the and so the of the led strip is connected to the ground of the motherboard (the - of the hdd activity led) collector of transistor connected to the of led strip and the of the led strip connected to +12v or whatever voltage the led strip needs. from hdd activity led -> emitter of transistor from hdd activity led -> resistor (for safety, protect mb and transistor, etc) something like 1 ohm (low value, because current is already small enough) -> base pin of transistor If you want to connect a led strip or something which would be powered from 12v or some other voltage (so basically you don't want the leds to be powered by the motherboard), then you would use a npn transistor or a mosfet to act like a switch, which would basically turn on or off the power going to a separate strip of leds.įor example, let's say yo want a led strip to flicker based on hdd activity. Modern efficient leds will still light up substantially at 1mA or even less ( the high brightness red leds with small angle lens on top are very bright even at half a mA) 2 leds = half the original current, 3 leds = each gets a third. So you can put additional leds in parallel with that led, but then each led will receive less current. The modern green and blue leds are very power efficient so that limited amount of current is good enough, they'll be quite bright even with just that little current. The pins on the motherboard provide a limited amount of current, maybe about 5mA, and it's usually powered from 5v stand by. The final tone depends also on the place you mount it in the case, feel free to experiment in tuning !ĭemonstration recordings will follow.The HDD activity and power on LEDs are in that header where you put the power on and reset wires coming from the case. add an external actuator on the option port if you like more noise.change orientation / position of board within your case.put some material in the buzzer hole in the enclosure.put some tape on the enclosure to change the tone -> more bassy sound.High volume 'Quantum mode' : very loud old cranky HDD sound, this option is selectable in the webshop.make changes to calibrate the sound yourself. Medium volume 'LGR mode' : put some tape on the buzzer hole : this dampens the sound slightly, and changes the tone a bit (like in LGR video).Low volume 'modern IDE HDD mode' : a small sticker on the speaker directly : this dampens the sound, sounds like modern harddisk -> this option is now by default selected in the webshop.Use the test button to calibrate for your needs, you can easily adjust the behaviour by making small physical adjustments : Optional 70cm connection cables available (for large tower case mounting).Ī 3d printed enclosure is available (includes a velcro mounting dot) :īy default, this emulates an old loud harddisk (like loud old quantum drive). Includes a 30cm LED connection cable, to connect the board to your mainboard. Programming header (do not use, reserved for factory/future updates of the attiny processor).'External out' header to optionally connect additional speaker or higher current 5V visual indicator.The LGR video shows the 'loud 'quantum hdd' sound configuration (no sticker on buzzer).Īlternative option is a more silent 90s HDD sound configuration (sticker on buzzer).ĭeveloped in friendly cooperation with Matze, based on his prototype. Sound volume and tone can be physically tuned, from very loud to almost silent, by applying simple physical changes. It allows the nostalgic harddisk sound, while using modern SSD, CF or SD cards. HDD Clicker generates HDD clicking sounds, based on HDD Led activity.
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