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Hackster.io’s 2019 project shows how to send a small monochrome bitmap from an Arduino UNO to an analog television using the TVout library. Its workflow is to convert an image into bitmap data, store that data in a header file, and draw it with TVout. The tutorial specifies images no larger than 128×64 pixels, while its sample sketch initializes a 128×96 PAL display; those are separate dimensions, not interchangeable limits.
What you need
- One Arduino UNO.
- Generic jumper wires.
- An analog television and a way to connect the Arduino’s TVout signal to it. The project page does not provide a complete textual wiring pinout, so confirm the wiring for the specific TVout library and hardware rather than assuming a pin assignment.
- The TVout library and the U8glib image converter linked from the project.
The project is a monochrome bitmap demonstration, not a general-purpose color-image display method. Its author describes the goal as printing an image on an analogue TV. Read the Hackster.io project.
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Prepare the image and bitmap data
- Resize or reduce the source image to 128×64 pixels or smaller, as specified by the tutorial.
- Use the U8glib converter linked on the Hackster.io project page to generate code for the image.
- Copy the generated bitmap data into a header file. The example declares the image as an unsigned character array in program memory using
PROGMEM; its array is namedcar[].
The 128×64 value is the tutorial’s stated image-preparation limit. It is distinct from the sample display setup, which is 128×96.
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Set up and draw the bitmap
The example sketch includes TVout.h, initializes TVout with TV.begin(_PAL, 128, 96), clears the display, then draws the bitmap using TV.bitmap(10, 10, car). The coordinates place the bitmap at (10, 10) on the initialized display. The loop includes delay(60).
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In outline, the example’s sequence is:
- Include the TVout library and the header containing the bitmap array.
- Initialize PAL output at 128×96, matching the shown
TV.begincall. - Clear the display.
- Draw the bitmap at (10, 10) with
TV.bitmap(10, 10, car). - Use the loop delay shown in the project,
delay(60).
The page mentions PAL or NTSC in a code comment, but the displayed initialization uses _PAL. It does not provide a complete NTSC example or compare the two standards.
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What the tutorial does not establish
- Exact wiring: the page lists an UNO and jumper wires but does not spell out a full pin-by-pin connection in text. Check the library and hardware documentation for the circuit you are building.
- Current compatibility: the project was published March 30, 2019. The page does not establish whether the TVout library remains maintained or whether the example works unchanged with current boards, libraries, and televisions.
- Display behavior beyond the example: it demonstrates a small monochrome bitmap; it does not substantiate color output, other image sizes, or guaranteed operation on every analog TV setup.
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