NBTV without any moving parts. THE NIPTRIX
Posted: Thu Oct 04, 2012 11:44 pm
Having dabbled with a tiny NBTV (The Nipper), I am considering the complete opposite. A project based on three items I have seen.........
1. Some years ago at NBTV convention was a flat array of 1563 LEDs
forming a large NBTV picture. But the LEDs were switched by a large rotor, so intermittent connections were the problem.
2. In recent newsletter Jeremy outlined his single line scanner using two CMOS 4017 as switches to light up a straight row of 60 LEDs in sequence.
3. On utube was a 3D 8x8x8 LED cube controlled from a Raspberrypi.
So if No1 were combined with an extended version of No2 but with an additional analogue NBTV input to control the light o/p of 32 rows of 48 LED's one would have a Non Mechanical flat, bright, NBTV display.
(All synced from the line sync pulses)
Using 5mm LEDs it would give a picture about 10" x 6"
LEDs can be bulk bought at about 2 p each
.
No noise at all, as it hangs on the dinning room wall. Mmmmm.
Maybe a Raspberrypi would help in its control as in No3, but this is not really necessary and would only add to the cost.
The 4046 pll could be put in the dustbin. Imagine that!
I estimate about 3200 soldered joints required, hence my consideration only at this point.
1. Some years ago at NBTV convention was a flat array of 1563 LEDs
forming a large NBTV picture. But the LEDs were switched by a large rotor, so intermittent connections were the problem.
2. In recent newsletter Jeremy outlined his single line scanner using two CMOS 4017 as switches to light up a straight row of 60 LEDs in sequence.
3. On utube was a 3D 8x8x8 LED cube controlled from a Raspberrypi.
So if No1 were combined with an extended version of No2 but with an additional analogue NBTV input to control the light o/p of 32 rows of 48 LED's one would have a Non Mechanical flat, bright, NBTV display.
(All synced from the line sync pulses)
Using 5mm LEDs it would give a picture about 10" x 6"
LEDs can be bulk bought at about 2 p each
.
No noise at all, as it hangs on the dinning room wall. Mmmmm.
Maybe a Raspberrypi would help in its control as in No3, but this is not really necessary and would only add to the cost.
The 4046 pll could be put in the dustbin. Imagine that!
I estimate about 3200 soldered joints required, hence my consideration only at this point.