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The project described in this article is a constant Q, fully expandable graphic equaliser. Where most "conventional" graphic EQ circuits have a Q that is dependent on the setting of the pot, this one maintains the same Q at...
There are important considerations when using additional memory, but it is certainly feasible. The MP3 player project utilizes 32 megabytes of memory. However, using more memory necessitates careful planning. The key factor is that the 8051 processor has a...
Red = V+, Black = V-, Green = GND, Yellow = Mic Input, Orange = LED Output. The op-amp used is an LM741, which is intended to adjust the peak brightness of the LED based on the ambient sound...
This is a simple home telephone ringtone generator circuit constructed using only a few electronic components. It generates a simulated telephone ringtone and requires a DC supply voltage ranging from 4.5V to 12V. This circuit can be used in...
This component is useful for ensuring that the subwoofer is in phase with the speakers of the existing car radio. It utilizes dual-linear motion potentiometers, capacitors, and electrolytic components. The circuit described involves a phase alignment system designed to optimize...
A magnetic switch is a circuit designed to respond to surrounding magnetic fields detected by the sensor. This series of magnetic switches employs limit switch sensors that include an additional metal plate capable of responding to a magnet. The...
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