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AUDIO PROJECTS

LOW COST COMMERCIALLY PRODUCED PCBs FOR ALL PROJECTS AVAILABLE NOW AT THE STORE PAGE

DIGILITE FILTER ADD-ON PCB

 

 

 

 

 

Always an after-thought the audio quality of ATV stations should now be considered and improved when using digital .
This design has four settings which allow wide ranging control of the audio. It can be set as a compressor or limiter or basic agc with adjustable noise floor. Requires either a line input (via a preset pot) or an electret microphone.
Full CQTV article pdf can be download here.
CQTV 243 ARTICLE .
PCBs  AVAILABLE IN STORE.

 

 

 

 

 

 


 

VIDEO AGC BOARD with BLACK-LEVEL CLAMP

 

 


A CQTV ARTICLE.
PCB in STORE.
MODs and UPDATES here
Essential where you may be taking video feeds from more than one source. The board has link options for AGC on/off and gain 0dB/6dB. Input and outputs have optional attenuator pads to ensure good 75 ohm matching is maintained and output can be either resistor or capacitor. Full CQTV article pdf can be download here.
CQTV 244 ARTICLE.
PCBs AVAILABLE IN STORE
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AUDIO LIMITER/COMPRESSOR

AUDIO BOOSTER.
Tiny Low-cost double sided PCB that gives 2 channels with adjustable >10dB boost to any audio signal.
Using discrete transistors it gives at least 4x gain.
Cheaper ( and prettier) than building it on a piece of VeroBoard. Click image to link to circuit details.
DUAL CHANNEL AUDIO BOOSTER