showing the scanning
Each row blinks on and off. This is a picture taken in the dark. I lined the face up in the lower right in the camera's LCD screen, and when it went dark, signaling the picture being taken, I slid the face up and to the left. The red lights appear as dots, proving that they're not on continuously as they appear to be. Actually, there is a slight shimmer to them, especially if you look around at different parts of the face - when your eye jumps, you can see the shimmer in your mental afterimage. I did throw in a pretty lengthy pause via TIMER0 between rows, though, so this can be reduced, and what's more, I'm only using a 4MHz oscillator, which runs a bit slower than that in tests. When I switch to the 20MHz crystal, and crank up the voltage a bit, it should appear rock solid, even across the proposed 32x32, bicolor panel I'm hoping to build with this.
Energizer paid me $0.50 for that bit of subliminal advertising.
showing the scanning
Each row blinks on and off. This is a picture taken in the dark. I lined the face up in the lower right in the camera's LCD screen, and when it went dark, signaling the picture being taken, I slid the face up and to the left. The red lights appear as dots, proving that they're not on continuously as they appear to be. Actually, there is a slight shimmer to them, especially if you look around at different parts of the face - when your eye jumps, you can see the shimmer in your mental afterimage. I did throw in a pretty lengthy pause via TIMER0 between rows, though, so this can be reduced, and what's more, I'm only using a 4MHz oscillator, which runs a bit slower than that in tests. When I switch to the 20MHz crystal, and crank up the voltage a bit, it should appear rock solid, even across the proposed 32x32, bicolor panel I'm hoping to build with this.
Energizer paid me $0.50 for that bit of subliminal advertising.