home
products
contribute
download
documentation
forum
Home
Forums
New posts
Search forums
What's new
New posts
All posts
Latest activity
Members
Registered members
Current visitors
Donate
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Contact us
Close Menu
Forums
HTPC Projects
Hardware
Ambient Lighting System
[DIY] User Showcases
[DIY] AtmoOrb - A Hue like mood lamp based on Particle Photon with NeoPixel - *Tutorial added*
Contact us
RSS
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Lightning303" data-source="post: 1179628" data-attributes="member: 97876"><p>The minimum input voltage is not the problem. But at what level your led chip thinks that a voltage is high.</p><p>WS2812B datasheet says:</p><p></p><p>Input voltage level</p><p>VIH DIN,SET 0.7VDD —— —— V </p><p>VIL DIN,SET —— —— 0.3 VDD V</p><p></p><p>So everything from 0.7*Vdd is considered high (1). And everything below 0.3*Vdd is considered low. Lets say your power supply gives you a perfect 5V. Then you need 0.7*5=3.5V to get a clear and stable high signal. With 3.3V we just dont get there. Yeah there is a little room for error, but you should drive your electronics always in spec <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" />.</p></blockquote><p></p>
[QUOTE="Lightning303, post: 1179628, member: 97876"] The minimum input voltage is not the problem. But at what level your led chip thinks that a voltage is high. WS2812B datasheet says: Input voltage level VIH DIN,SET 0.7VDD —— —— V VIL DIN,SET —— —— 0.3 VDD V So everything from 0.7*Vdd is considered high (1). And everything below 0.3*Vdd is considered low. Lets say your power supply gives you a perfect 5V. Then you need 0.7*5=3.5V to get a clear and stable high signal. With 3.3V we just dont get there. Yeah there is a little room for error, but you should drive your electronics always in spec ;). [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
HTPC Projects
Hardware
Ambient Lighting System
[DIY] User Showcases
[DIY] AtmoOrb - A Hue like mood lamp based on Particle Photon with NeoPixel - *Tutorial added*
Contact us
RSS
Top
Bottom