Researched a low cost, replaceable linux device for a new digital signage platform, based off a Raspberry Pi. The Raspberry Pi was only new at the time and didn't have the software required, so other hardware was used instead.Signchro
Changed to Arduino based, restricted it to non-display and relay control, proved web connectivity via ethernet board, expanded with a few more sensors and a web based configurator, and finalised an enclosure. Initial pcb design and fabrication, and assembly testing.Discover Elbeano
Based off a 555 chip with a few discrete components, using leftover enclosures from initial project.Read about it
Allow for more accurate timings, added wifi connectivity via ESP12F to send sensor data without the ESP32-Cam, created cloud app to send and receive data, initial pcb layoutSee the technical bits
Added bios-like functionality, added dedicated app chips, power finalisation, pcb finalisation and initial printWorking it all out
Added the idea of making this board and its power options the base for sub boards to give it much more capability.Prototype
Designed a number of sub boards for dedicated applications for the launchSub boards
Assembly order and component testing, to get costs and stabilityMass production
With the device proven and costs worked out, fixed up a few issues within the firmware and got the SaaS working nicerSoftware
Show scrolling up to date news feeds on oversized segmented led displays. Display a coloured led status when the temperature drops or a gate is opened.
Weather resistant, self uploading, change detection
Stackable, low power signals, high current sink, light grids/matrix, text displays, lighting sequencesGiant Alphanumeric Display Neon style sign
Rechargeable, water resistant, as little as each minute
Status indicator, temperature, light, doors/gates, movement. Kit form
Trigger when a door is opened/closed, or when an object is moved.
Demonstrating the ability to communicate with I2C peripherals. Oled status display. Kit form. QR Codes
Ideal for queue/ticketing applications. Trigger rechargeable ResourciBoards with a simple tap.
Ask Alexa the status of a device or to set a device to display your words. Receive emails when a device detects movement or a significant change.
¹input voltage limit dependent on heat dispersion available
²3.3v operation only
³current limited due to requirement of boost
⁴boosted, or no boost for extra low power operation (no recharge available)
⁵requires dedicated li-ion charging board
⁶depending on battery brand, longer delays between updates required, long initial recharge period
IO pins and their abilities overlap with eachother limiting the amount of peripherals
Only one power source can be provided at one time
Battery type practicality is determined by the peripheral current requirements
Prioritised for low power applications, ease of assembly, and easy to source components.