# A touch-activated talking crystal ball

Touch pads activate a voice conversation while a light ring reflects conversation state.

## Hardware
Raspberry Pi 5; Arduino Uno; capacitive touch sensors WS2; WS2812B ring

Touch sensors activate a voice interaction while an Arduino-controlled light ring signals conversation states inside a physical crystal-ball enclosure.

## Shopping list

Astrology output is entertainment, not a factual prediction. Keep the speakerphone external as the source describes; no microphone amplifier is needed if using the documented USB speakerphone.

Quantities are for one build. Unless marked source-specified, they are planning quantities; confirm kit contents and the chosen configuration before ordering.

### Confirm before buying
- LED ring count, supply current, resistor/capacitor values, exact WS2 modules, Uno revision and enclosure sizes are not supplied.

### 1 × Raspberry Pi 5
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Voice/backend host.
- Notes: Memory capacity not specified.
- Destination: https://www.raspberrypi.com/products/raspberry-pi-5/
- Match: Manufacturer model page; select the specified memory
- Link review: Source-linked; live page not verified; stock not assessed
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 1 × Arduino Uno
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Touch/LED controller.
- Notes: Revision not specified.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 2 × Capacitive touch sensors WS2
- Requirement: Required
- Quantity basis: Source-specified quantity
- Purpose: Two independent touch inputs.
- Notes: Source specifies momentary active-high outputs to D2/D3, with 5 V and GND.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 1 × USB speakerphone with microphone and speaker
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Conversation audio.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 1 × WS2812B / NeoPixel-compatible LED ring
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Animated light output.
- Notes: Diameter, LED count and current demand not stated.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 2 × Copper-tape touch pads
- Requirement: Required
- Quantity basis: Source-specified quantity
- Purpose: External touch electrodes.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 1 set × Globe and base
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Enclosure.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 1 × Regulated 5 V LED power supply
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Power LED ring.
- Notes: Separate regulated supply, common ground; current sized to actual ring.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 1 each × LED data-line resistor and power-input capacitor
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Signal/power conditioning.
- Notes: Values are not stated by the creator; establish them from the selected ring and wiring.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### Set × USB cables and wiring
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Pi, Arduino, speakerphone and lights.
- Sourcing: No exact purchase link verified; confirm the model and requirements above before ordering.
- Evidence: Creator source
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 1 set × Pi boot storage and suitable Pi power supply
- Requirement: Required
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Run the backend.
- Sourcing: Use existing equipment or match the specification above. No exact purchase link verified.
- Evidence: Setup requirement — check against your configuration
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### Set × Assembly and test tools
- Requirement: Tool
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Assemble and check the circuit.
- Notes: Soldering iron, solder, wire cutters and multimeter; review the wiring before power-up.
- Sourcing: Use existing equipment or match the specification above. No exact purchase link verified.
- Evidence: Setup requirement — check against your configuration
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

### 1 × Computer for setup
- Requirement: Tool
- Quantity basis: Planning quantity for one build; check the selected configuration
- Purpose: Build, configure or flash the software.
- Sourcing: Use existing equipment or match the specification above. No exact purchase link verified.
- Evidence: Setup requirement — check against your configuration
- Source: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

Source reviewed, not assembled or hands-on tested. A working product page does not confirm stock, firmware compatibility or a complete build.

## Setup
Kit / assembly

## Coding tool
Codex

## How the agent helped
The creator credits Codex with the voice application, Arduino firmware and integration between the Raspberry Pi and lighting hardware. The divination theme is entertainment, not a claim of predictive accuracy.

## Before you build
Physical prototype requiring wiring and cloud voice service. Astrology is entertainment, not an evidence-based prediction method.

## Sources
- Original build: https://youcanjustbuildthings.openai.chatgpt.site/projects/submission-28178db8385f4cc1aa1cc7a276d4e3eb651a2f5a16df5e93e1c6995b45a30663

Source reviewed 2026-11-04. Not hands-on tested.