My name is Patrick Mitchell, and I'd like to welcome you to my 15th Kickstarter campaign! Meet the Production-Ready Arduino Compatible HQ record and Playback Audio Module!
With ease, you can record and playback up to eight sound bytes using your own voice, or PC. There is an on-board microphone, and an audio input, so that you can record sound bytes coming from an external source, such as the audio output line from your PC or Mac! You can also use the on-board audio output jack to connect to your own amplifier/speaker set!
This unit has a maximum recording time of 680 seconds, and a minimum recording time of 341 seconds. There is a sampling frequency VS recording time relationship. The shorter the total recording time, the better the playback audio quality is. This sampling rate is determined by an on-board resistor, and you will have the option of choosing your total recording time in the survey at the end of this campaign. You will also have the option of not having a resistor placed, so that you an choose on your own when your reward arrives.
Total Recording Time Versus Sampling Frequency Chart:
Record and Playback Modes:
Using two on-board headers, you can select between single message mode, 2-message mode, 4-message mode, and 8-message mode. In these modes, your total recording time is divided by the number of total messages that you've selected. for instance, if you are in 8-message mode, your total recording time is divided by eight. If you have a total recording time of 680 seconds, then each message has a maximum recording time of 85 seconds when in 8-message mode. Alternately, if your total recording time is 680 seconds and you are in single message mode, then your single message can be the full 680 seconds in duration. You can change your message mode selection before power up as you see fit, but if you change from 8-message mode to any other message mode, then previous messages will be re-recorded over.
Power Supply Options: This unit requires 7.5v to 9v to operate. There is a power supply terminal block, and a 5mm power jack. The block has two terminals labelled "V+", and GND. Connect 7.5v-9v to the V+ terminal, and DC ground to GND terminal to power this unit. Alternately, some reward tiers include a compatible 9v 1A wall adapter.
Message Control Rail: To record and playback message using an Arduino, you will need this rail made up of a 10-pin male header block. This block contains a regulated 5v pin "V+", a DC ground connection "GD", and pins labelled 1 through 8. These pins control messages one through eight respectfully. Messages are played back when any of these lines are pulled low (OUTPUT,LOW). A code sample will be available at the end of this campaign.
Record/Playback Select: This switch allows for the user to select between record and playback mode. When the switch is in the "ON" position, then the user is in record mode. When the switch is in the "OFF" position, then the user is in playback mode.
External Audio Input: This stereo jack is where you would connect an external audio input source; say from your PC, or Mac.
Mic: This is the on-board microphone that can be used to record verbal commands, and the like. It can also be used to record what is going on in a room.
External Input Select: Using this jumper you can select between the on-board microphone, and the external audio input for recording. When the jumper is removed, you are only using the microphone to record. When the jumper is on, you can use an external audio source. You can also add in your own voice and have a karaoke effect when you use an external source, as the microphone is still connected. Please see the video manual for more information.
Busy Signal: This 2-pin header consists of an ground pin (GND), and a busy pin "BUSY". The logic on this pin is normally high (5v), and goes low (0v) when the unit is in the midst of recording, or playing a message back. Once this task is complete, the logic on this line goes back to 5v. This signal is useful when using a microcontroller to playback messages. The logic on this line is the inverse of the on board LED.
Speaker Connector: This 2-pin header connects to the speaker attachment.
External Output Jack: If you wish, you can use this jack to connect the audio output to an external amplifier/speaker set for higher volume. If you choose to do this, simply remove the speaker, and connect to a set of computer speakers or audio input to your Bose player!
There is an on-board BUSY LED, and there are a few headers that allow for you to customize operations that are not labelled in the above diagram, but are talked about in the video manual.
The User Manual, Assembly Video & Code Samples:
By the final week of this campaign, I will have a detailed video manual published, and ready to share with you all. As well, I will be sharing some simple Arduino code samples and the schematic diagram. Lastly, for those of you who are decide to pledge towards a DIY kit, I will be publishing a detailed assembly video prior to reward shipment.
There are four accessories that work alongside the HQ Record & Playback set, and they are:
The Speaker: This 1W speaker connects directly to the speaker header on the upper left-hand side of the board.
The Stereo-Stereo Connector: This connector allows for you to either connect the external audio input jack to an external audio source, or to connect the audio output jack to an external amplifier/speaker set.
The AC-DC Wall Adapter: This wall adapter is rated for 120-240VAC-IN at 50/60Hz, and outputs 9VDC @ 1A. This is a nominal power supply module.
Female-Male Connector Wires: At the end of this campaign, if you've pledged towards a reward tier that includes them, you will be able to choose between 10x female-female wire connectors and 10x female-male wire connectors. These wire connectors allow for you to interface the HQ Record & Playback set with your Arduino or PIC project!
How Will The Funds Be Spent, And Why Kickstarter?:
Thanks to the Kickstarter community, thirteen of my last fourteen projects have been given life. I'm very grateful for that. Without this community, most of my project ideas would simply fall through the cracks. The goal of $900 will be enough to have a decently sized run of the HQ Record & Playback sets assembled, and shipped to me. The remainder of the funds will go towards the purchasing of accessories, bare PCBs for DIY kits, and the components necessary for kitting. The goal of $900 is the bare minimum required to bring this project to life. If I've earned your pledge, then please know that you can count on me not to let you down!
Most of my campaigns have a long and drawn out production schedule section. I'm going to break it down simply here. The end goal is to have all rewards shipped six to seven weeks after this campaign begins. Ideally, two weeks after this 30-day campaign ends. Give or take a few days. I've never met with a delay in the past, and I can't see any reason why this campaign would be any different. This set is production ready, and I'm rearing to go.
One week after this campaign begins, I should have an idea as to whether or not this campaign will be successful. I will generate a forecast for kitting and assembly numbers. If all is well after the second week, I will be submitting my orders to my component sources and my PCB manufacturer. Between the second and final week of this campaign, I will be working on the assembly video, video manual, and code samples. These will be published and shared in project updates as time progresses. I should have all of the components and assemblies in hand by the end of the fifth week (One week after this campaign ends). During the sixth week, I will be kitting, testing assemblies, and packaging rewards. I should have everything ready for shipping by the end of the sixth week. This lines up with when the funds are transferred from Kickstarter. I have in the past shipped before receiving the funds from Kickstarter, as they are very reliable when it comes to on-time fund transfers. If I have earned your pledge, then you have my personal pledge to you that I will work tirelessly to have your reward shipped on time!
Thank you again for your time and consideration. If this project interests you, and if you pledge towards a reward tier, then please know that you can count on me. Thank you for having a gander at my 15th Kickstarter campaign. Happy 2016 to you all. I hope to run several fun campaigns this year, and I hope that this will be a successful one!
Risks and challenges
There are very few risks involved with this project. The record and playback sets are production ready. I have solid relationships with my component suppliers/ manufacturers, and I have a lot of experience in running successful Kickstarter campaigns. If by the off chance there was a large burst in orders right at the end of the campaign, then I would have to ask my manufacturer to quickly assemble more units, which would mean that some people would have to wait for the additional units, but I do not see this happening. I do my very best to forecast what parts are needed for reward shipment. I've not run into this problem as of yet, and I do not anticipate that this will be a problem that I run into for this campaign!Learn about accountability on Kickstarter
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