# Designing a Encoder+LEDRing-PCB **URL:** \ **Category:** MIDIbox HUIs\ **Created:** [December 6, 2012, 2:12pm UTC](https://forum.midibox.org/t/designing-a-encoder-ledring-pcb/17125 "2012-12-06T14:12:23Z")\ **Posts on this page:** 1\ **Page:** 2
**Author:** ![zener](https://forum.midibox.org/letter_avatar_proxy/v4/letter/z/ed8c4c/32.png) [@zener](https://forum.midibox.org/u/zener)\ **Post date:** [December 18, 2017, 2:13pm UTC](https://forum.midibox.org/t/designing-a-encoder-ledring-pcb/17125/21 "2017-12-18T14:13:02Z")
> On 20 marzo 2013 at 11:22 PM, FantomXR said: > > For those of you, who don’t want to use 2x8 encoders at a time, here is the first design of a PCB I made. There are a few things to improve, but it’s working! > > In the next days I will equip another PCB with the parts and see, if the forwarding is working and if there is enough space for all the connectors / connections. > >   > > For now the LEDs are driven by the 74H595 only and each LED is feeded with 15mA. I think, for later use they are not bright enough. I don’t think, things will change, if I use a ULN2803 for driving the LEDs, because the difference in brightness between 15mA or 20mA is really not that much. Maybe I should use other LEDs… > > ![post-10331-0-25673300-1363817940.jpg](https://forum.midibox.org/uploads/default/original/2X/d/d951f9c7626a45b2de5fb196ae5d738753a892ae.jpeg) > > ![post-10331-0-69430300-1363817943.jpg](https://forum.midibox.org/uploads/default/original/2X/d/d12986246cc13148d74c0022e50d26e0cecb3427.jpeg) > > ![post-10331-0-12170300-1363817946.jpg](https://forum.midibox.org/uploads/default/original/2X/8/85dd57863a46bb58dd944ed9fba65e6c39753b63.jpeg) > > ![post-10331-0-72655200-1363817947.jpg](https://forum.midibox.org/uploads/default/original/2X/e/e51237e43df023d1d7ac29a8b66eb58c07035fbd.jpeg) > > ![post-10331-0-36367700-1363817949.jpg](https://forum.midibox.org/uploads/default/original/2X/b/bbafae441daa372c06385e56f8c9a49500945c5e.jpeg) Hello FantomXR, there is  also available a single pcb with 8 rotary encoders  each with leds ring and 1 , 2 or 3 switches “place” as well + cascade connection option for get a single or more lines with 8,16,24,32…. rotary encoders connected in cascade mode ? thanks [Previous page](https://forum.midibox.org/t/designing-a-encoder-ledring-pcb/17125.md?page=1)