Voice Changer

Voice Changer project can be used to transpose or distort one’s voice by encoding the sound appearing at the Microphone input. This project is built around AP8072 IC.

 Voice Changer

Specifications


Supply input : 6 VDC @ 200 mA
Output : Speaker, 8 Ω / 0.5 W
Audio amplifier type LM386 with volume control preset
Jumper selectable tone frequency for encoding sound
4 Tones to choose
Built in noise reduction circuit for reducing environment noise
On/Off Jumper connector for power supply input
Berg connector for power supply input and speaker output
Four mounting holes of 3.2 mm each
PCB dimensions 48 mm x 52 mm
[Link]
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Light To Audio Oscillator

Light Sensitive Audio Oscillator project is a fun loving project which will create different sound effects depending on the light falling on the sensor

 Light To Audio Oscillator

Specifications


Supply input 5 ~ 12 VDC
Output 8 Ohms, 0.5 W Speaker
Terminal pins for supply voltage and speaker connection
Power-On LED indicator
PCB dimensions 38 mm x 44 mm
[Link]
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Sound to light effect

Audio Dancing LED project is a fun filled project which generates a LED dancing sequence depending on the audio level it senses. This project is based on one of the VU Meter IC LB1403 or CA1403.
 Sound to light effect

Specifications


Power supply input 6 to 9 VDC
Output 5 LED’s
Onboard preset to adjust audio level to the IC
Onboard microphone capsule with Preamp
Terminal pins for connecting power supply input
Four mounting holes of 3.2 mm each
PCB dimensions 39 mm x 67 mm
[Link]
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ARC Digital Amplifier

The ARC was made to bridge the gap between high-end sound quality and the world of digital music. Designed as the perfect receiver and amplifier, this ultra-compact unit provides high-resolution USB audio streaming capabilities, high quality aptX Bluetooth audio and astonishingly detailed sound. For a great listening experience and immersive sound, all you need is a set of speakers and the ARC. Done. [Link]

 ARC Digital Amplifier
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120A Solar BMS charger LiFePO4,Li-ion OffGrid,RV with WiFi

Solar BMS (Solar Battery Management System)is a solar charge controller designed to replace the Lead Acid solar charge controllers most people use today in Offgrid, RV, Boats and multiple other applications with 12V and 24V systems. Solar BMS can be used with 3 up to 8 Lithium cells (any type) or supercapacitors. The new SBMS100 will have multiple improvements over the first generation SBMS4080 see further for details.
[Link]

 120A Solar BMS charger LiFePO4,Li-ion OffGrid,RV with WiFi
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Solar self-rechargeable Battery

This is a prototype model Battery (type C ) for electronic devices. The battery has the ability to be recharged by the sun and don’t need any battery charger. It is necessary for climbers, explorers, soldiers, free camping and general for humans who attempt in areas without infrastructure electricity. The standard can also be applied to other types of batteries and the current technology allows their development with much greater energy capacity. [Link]

 Solar self-rechargeable Battery

Specifications of the prototype:

Battery 1.2v 700 mAh
Solar cell 1.5v 70mA
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Logging harvested solar power using $15 Scorpion Board

It’s undeniable that South Africa is experiencing a critical electricity crisis. On the positive side, it’s forcing us to conserve and consider alternative sources of energy. My mom sponsored our household with a cheap Chinese solar panel with battery pack and LED lights to use during load shedding (we live in Cape Town zone 6 and you can find the schedule here).

 Logging harvested solar power using $15 Scorpion Board

This made me wonder: how much solar power does this system harvest in one day? Enter my handy $15 Scorpion Board. I built a cheap current sensor board (using a Diodes ZXCT1051 low side current sensor IC). [Link]
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