leddanax.blogg.se - Kenwood stereo control amplifier

Kenwood stereo control amplifier full#
Kenwood stereo control amplifier software#
Kenwood stereo control amplifier code#

sevenSeg_displayHold() Function that perform the multiplexing to draw every digit with a assyncronous delay between segments.

sevenSeg_setNumber() function that sets the displayData buffer with the correct sevenSeg_font bitmap.

displayData - byte buffer of each 7 segment display.

sevenSeg_font array containing a bitmap that represent each digit.

Kenwood stereo control amplifier full#

Only a single segment is turned on at time, this allows the display to be turned with just the pins current, and only requires a single resistor per display on the common pin, also allows the display to use a fraction of the full power.

Kenwood stereo control amplifier software#

This arduino sketch provides software to drive 7-segments display with multiplexing, asynchronous, and doesn't not require external hardware or timer interrupts. function called on the main loop it will handle the timeouts and will call the sevenSeg_displayHold() that will display the data on the actual display.VIEWMODE_IDLE, the display will not change it will display whatever is currently on the buffer.įramesLenght and frames is the actual animation and length.VIEWMODE_LOCKED, turn of the display, and turn on the decimal points.VIEWMODE_ANIM_VOLDW, display the anim backwards then switch to VIEWMODE_NORMAL.VIEWMODE_ANIM_VOLUP, display the animation then switch to VIEWMODE_NORMAL.VIEWMODE_ANIM_MUTE, alternate between dashes and the current volume in a defined interval.VIEWMODE_NORMAL, displays the current volume, then switch to VIEW_IDLE.currentViewMode - one of the possible ones:.

ledBlink - handles led blinking and time out asynchronously.

Kenwood stereo control amplifier code#

The code is fairly extensive, I will provide an overview of the full code. Or you can find the complete code for this project at the final steps.

The code for just the display multiplexing can be found here:

reduced power consumption (since there's only a single segment powered at time).

simpler driving electronics can be used (single resistor per display, instead of one for each segment).

fewer wires are needed, paralleling the displays except the common wire.

This technic is called multiplexing.Ī multiplexed display has several advantages compared to a non-multiplexed display: At normal speed it gives the impression that a 88 is being displayed. Then it shows how two digits can be seem as fully lit up, but in reality only a single segment is lit at once. The video starts in a slow motion fashion so you can see every segment lit up individually, then it gets faster and faster, until it reaches normal speed and the digit 3 seems still. The video above, illustrate how I wrote a library that drives the 2 displays without a driver, just using the micro controller pins.