Timex Sinclair 1000 - ZX81 - RGB color on the ZX81
#Timex Sinclair 1000
#ZX81
#RGB
#retro computing
#video output
#color generation
#8-bit computer
#composite video
#hardware hack
#vintage computing
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basic circuit makes rgb color organ
The concept of a color organ involves the transformation of sound, including musical tones, into light. According to wave theory, both music and light possess similar wave characteristics.
A color organ is an electronic device that visually represents sound through the...
Composite-video-signal-text-adder
This circuit demonstrates a straightforward method for incorporating text information into a composite video signal that may be at an undefined DC level. It is essential that the text generator and the composite video source utilize the same synchronization signal....
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The incoming RGB inputs are terminated with resistors R1, R2, and R3, along with potentiometers RV1, RV2, and RV3. These components provide input impedances of approximately 75 ohms. The presets should be adjusted to allow a maximum input of 1...
Composite Video titling Generator
The VTG-01 is designed to display user defined text over a composite video signal. This is useful in a multitude of different applications such as adding titles to home movies and adding custom text to security videos. Text can be...
RGB To Monochrome converter
Often you can get away with running a monochrome monitor on GREEN, but this looks real crappy when viewing color images. These simple resistor networks allow you to display R+G+B on a B/W or CCTV monitor without ghosting. Be sure...
THE ZX97LITE SCHEMATIC
The ZX97 was developed as a discrete replica of the ZX81, which served as the first personal computer for millions. However, the ZX97 evolved into more than just a simple copy. While maintaining backward compatibility with the ZX81, it offers...
RGB To Monochrome converter
Often you can get away with running a monochrome monitor on GREEN, but this looks real crappy when viewing color images. These simple resistor networks allow you to display R+G+B on a B/W or CCTV monitor without ghosting. Be sure...
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This circuit utilizes a Motorola MC1377 to generate NTSC video from an RGB source. The components are not critical, with the exception of resistor R7, which should have a tolerance of 1%, and capacitor CB, which should have a tolerance...