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All JobsAmplifiers and Filters

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Hourly Rate: Not Sure   |  Duration: 1-3 months  |  Posted: Aug 27, 2015  |  Ends: 9d, 21h  |   3 Proposals
Looking for the Hi-Fi Engineer to design an Audio Hi-Fi VU meter with the Following requirements: 9.1 Independent Analog Input Channels, RCA, XLR, Banana, Etc 9.1 Vu Meters/leds ( 1 per input ) Can use a DSP for Functions Like: Input Level, Input Detect: Peak, RMS Dimmer Response Speed. Your Job here will be to design the Electronic Part using from the shelf Components, write code is a plus. NDA and Contract will be required, If interested please send your information for NDA. Project design Price to be determined
Category: CAD       

e****ico
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| e****ico *
|    United States
Fixed Price: $500 - $1,000   |  Posted: Aug 11, 2015  |  Ends: 39d, 19h  |   10 Proposals
Hello, I am looking for some who can create a functional prototype of a Micro Headphone DAC/Amplifier for Iphone and android mobile ''samsung''. The DAC/Amplifier should be based on the AKM 4430 Audio DAC Chip. The DAC/Amplifier will not use a battery but will rather be powered by mobile device that it is connected to. The device should use official Iphone Lighting cable and Micro usb for the android/samsung mobile. The Purpose of the Device is to offer those who listen to music on their mobile devices a great HD Studio quality sound in a small well design compact and portable package. Please don't hesitate to ask any question. Design and dimensions for the prototype will be provided on request. Budget is negotiable so please don't be put off by it.
Category: Electrical       

a****ker
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| a****ker
|    United Kingdom
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: Aug 09, 2015  |  Ends: 67d, 9h  |   4 Proposals
FM receiver: "Bracelet" (or a wristwatch) (alerting with sound, light ... vibrating,) - A FM receiver, like a FM radio. FM transmitter: "Keychain accessory" - A weak and limited FM transmitter sending a signal in a short distance, something like 200cm (2 meters) away at most. The bracelet will alert when LOSING and/or FINDING the signal of the receptor. I imagine that the biggest technical problem will be to synchronize two devices (Transmitter / Receiver) with the same free frequency ? And ? maybe it's necessary a kind of specific sound transmission in constantly loop. In a short distance the bracelet finds the signal... insofar as move away... stays mute or begins to have interference or begins to sizzle. When losing the specific beep, the bracelet triggers the alert. To keep even more as a necessary item in day-to-day... it may be interesting add this alert function in a new kind of digital clock by adding a schedule of commitments associated with creating ale...
Category: Electrical       

c****uiz
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| c****uiz
|    Brazil
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