Analogue indicator control system (VU-meter)
System descriptions (full version):
The system consists of:
- Input divider
- Input stage
- full‐wave rectifier
- output amplifier with logarithmic system
- power supply
Operating description (left channel, indicator power amplifier)
The input signal should be supplied to connector P1‐4 or P1‐5. The input sensitivity of P1‐5 is
‐20dB less. This allows to change system sensitivity depending to which input the signal is sent. It
allows controlling the indicators when the volume is low. For example in amplifier 100W: At nominal
100W signal from amplifier output to input P1 ‐5 and indicators show 0dB. At low volume the
indicators will not move because the range is about 42 db and the volume regulation range is over
70db. With the help of an external switch, the signal is supplied to P1‐4 and indicated 0dB is achieved
at 1W.
Analogue indicator control system (VU-meter)
*PCBWay community is a shared platform and we are not responsible for any design issues.
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