This is the circuit diagram of electronic hearing aid featured with sensitive sound detection and energy saving, so this hearing…
This is the simple spring reverb guitar effect circuit that can be built low cost and just requires a minimal…
This is the schematic diagram of Infrared (IR) cordless headphone. Maybe it also can be called "wireless headphone", but it…
Here is the circuit diagram of stereo digital volume control. This circuit could possibly be applied for upgrading your manual…
This is the circuit diagram of USB powered stereo computer speaker, or it widely known as multimedia speakers for PCs.…
This is an easy, low cost and easy built circuit of an electronic horn which is designed close to quadruple…
Here the low cost and easy build circuit of ticking bomb sound generator. This circuit generates a sound matching to…
Here the cheap hearing aid to help people who have hearing loss. Commercially available assistive hearing devices are quite expensive.…
This is the circuit diagram of mic condenser amplifier. The low-cost and compact mic condenser audio amplifier described right here…
This is the circuit diagram of Electro-Harmonix Soul Preacher pedal. (more…)