I live in my house. Until recently, our whole big friendly family huddled on the first floor of a two-story house. Time passed, and the floor did not want to turn into a residential one. There were always other, more important things to do. And it would have dragged on for a long time (probably), if the spouse hadn't said at one point - I want my room! As you might guess, after a while the floor began to come to life. And as soon as that happened, the question arose of how to make the staircase lighting. I did not like the options to put pass-through switches or to highlight them with emergency lighting right away. Too simple and obvious. What about show off? Where is the wow effect here? I wanted to do something unusual. The best solution was to make the backlight using LED strips. This is where the freedom of creativity is in the presence of imagination!
Choosing a solution
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The approximate cost of the main components of the module (Chip-Dip prices):
LPC11C14 - 200r
TPS3828-33DBVR - 47r
AMS1117-5.0 - 16r
AMS1117-3.3 - 21r
TJA1042T / 3 - 55r
PESD1CAN - 12p
TXB0102DCU - 80r
15EDGRC-3.81-04 - 21r
15EDGK-3.81-04 - 35 rubles
ABM8G-12.000MHZ-18-D2Y - 170r
Small things - 50r
Total: 707r
Board tracing
There was a desire to make a simple cheap two-layer board, but ... it was just before the New Year and the Chinese friends had an action. Four layers x10 pieces almost free (500r)! It turns out that the fee was 50 rubles.
And I could not resist and did it humanly. Excuse me…
What is the bottom line at the moment. The boards have been ordered, the software is being prepared. To be continued…