Alex Ferro - Electronics Design

These boards are not provided for any purpose. Unless otherwise stated these boards may not be used without permission.
Contact me if you are interested in any of these boards that are free for use.

Completed Projects

Battery Chargers

Free for use.
Circuit as in datasheet

Breadboard LiPo charger:

Designed to fit my breadboard.
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Cellphone battery charger:

Charges the battery of a CB630 with a broken internal charger.
Fits the battery between the terminals and a row of pins for charging. Also used as reference board.

Three LiPo charger:

Charges three 1300mAh batteries simultaneously.
For the first prototype Laser Tag System (see below).
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I had to fix some problems on this with hot air after the connectors were all soldered on and parts melted.

USB to Serial

These are free to use as they are just breakout boards.

USB-B to Serial:

The standard FT232RL circuit with a large USB B connector on it. My first and only project using 0402 components.

FTDI Field Updater:

(Prototype 1)
Standard FT232RL circuit with DTR and RTS brought out as well as RX, TX.
Designed to mate with the Laser Tag Board.
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An error in router programming ran right through the board. After fixing that, it worked.

Power Supply

12V Boost Converter:

TI application note circuit, free to use.
Boosts 3.3V nominal to 12V at 400ma.
Breadboard Compatible

Laser Tag Base Station:

(Prototype 1)
Base Station for the Laser Tag system allowing computer control or standalone operation.
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Base Station without populated xBee

Laser Tag Main Board:

(Prototype 1)
Combines xBee, atmega2560, LCD, GPS, and Audio section to provide an outdoor laser tag system with with readouts, messaging via PS/2 port, auditory feedback, and radio communication back to base station.
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Bare PCB
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Close Up of Driver Section
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A soldered atmega2560

Projects in Progress

Laser Tag Main Board:

Prototype 2
Similar to Prototype 1 but with a built in keypad, a better GPS, a better power supply, and with the audio section removed due to problems.

Laser Tag Base Station:

Prototype 2 and probable production design
Connects the radio for the network to the computer for control of the game. Has onboard GPS and reprogramming capability for player units. Auto switch over to standalone operation when needed.