Here are some details about the hardware design of my babyphone project. Case reuse One of the project goal was to reuse as much of the original speakerphone case as possible, including the power switch, volume control potentiometer, front leds and keyboard. I though that as the box already contained amplifiers circuits for the speaker [...]
Entries Tagged as 'Uncategorized'
Babyphone audio playback
January 21st, 2012 · No Comments · Uncategorized
The final circuit has been built inside the phone enclosure, including amplifiers for the speaker and the microphone. Playback and record modules are developped an tested but the application code only supports playback for the moment. Next I need to improve the matrix keyboard driver to allow multiple key detection to trigger the record of [...]
Current project
September 27th, 2011 · No Comments · Uncategorized
I am currently building a “baby phone” toy for my son based on a discarded landline phone enclosure. The toy will feature record and playback on SD card to allow family members to record messages on the device. Voice messages would be played back when pressing a key of the original phone keyboard. The plan [...]
Bluetooth module breakout boards are back in stock
September 26th, 2011 · 1 Comment · Uncategorized
My initial production was only a short run to prototype the board for my personal use. Having sold out the stock and seeing the interest for the board, I have ordered a new batch that is now available for sale. The price at Olimex was interesting for prototyping but not for producing greater quantity. This [...]
Tags:Bluetooth·PCB Design·Shop
Serial Bluetooth module – Master/Slave connection
May 20th, 2011 · 7 Comments · Uncategorized
I have soldered a second serial Bluetooth module. I am now going to test them in a master/slave configuration. The test boards The first test board is the one already used for my slave test with a Teensy 2 as USB to serial adapter and power supply. This board will be the master one. The [...]
