may be sensor will sense temp. of heat sink.sensor resistance go high when its hot.then a circuit can show the temp. on display.its simple circuit.
It's only gimmick. As I wrote, I would like an ON / OFF switch and a mute switch with no visible switch. Just tap on a (hopefully beautiful illuminated spot) on the front panel.
The sensor is mounted invisibly behind the Plexiglas. The Arduino evaluates it and switched by relay for example power on and off. It would be necessary, however, to have a standby power supply. The Arduino also measures the temperature and controls the fan via PWM. It could also play VU meter alone, but Apex-VU looked so nice, so I built it.
It's all only hobby research. I want to try a few options. May be that Solid state it is not the right forum.
regards Olaf
merry CHRISTmass to you all 
wow lots of fellows building this mile amp,less component and easy to build.
how about the THD generate of this amp?..
if i separate the supply of vas a little bit higher than the output stage, will it increase its rated power?
this would probably require a soft start switch since the rail is too high and caps needed is too big.
how about the THD generate of this amp?..
if i separate the supply of vas a little bit higher than the output stage, will it increase its rated power?
this would probably require a soft start switch since the rail is too high and caps needed is too big.
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I Have Question About Post 28
Can i use 24volt coil relay on this schematic without changing any component
or 24v will be problem for protection to work corectly.
Can i use 24volt coil relay on this schematic without changing any component
or 24v will be problem for protection to work corectly.
I Have Question About Post 28
Can i use 24volt coil relay on this schematic without changing any component
or 24v will be problem for protection to work corectly.
You can use 24v relay without changing any component only with 24v supply
hi apex sir,
my friends ba1200 board bias is unbalanced.
why the bias voltage is unbalance in output base?
c5200 base voltage 570mv
a1943 base voltage 370mv.
dc offset 89mv.
my friends ba1200 board bias is unbalanced.
why the bias voltage is unbalance in output base?
c5200 base voltage 570mv
a1943 base voltage 370mv.
dc offset 89mv.
Dear Apex Sir,
Believe that everything is going well, I become fan of the schematic of BA2000, I have seen very few such symmetrical design, I will love to do the project but didn't find more than the circuit. Could u please focus some light on that, any update, PCB etc.
Since four year I didn't build any project after The "Legend Quasar", now felt interest coming across the circuit. Pls reply....
Thanks & best regards,
pranay.kundu@yahoo.co.in
Believe that everything is going well, I become fan of the schematic of BA2000, I have seen very few such symmetrical design, I will love to do the project but didn't find more than the circuit. Could u please focus some light on that, any update, PCB etc.
Since four year I didn't build any project after The "Legend Quasar", now felt interest coming across the circuit. Pls reply....
Thanks & best regards,
pranay.kundu@yahoo.co.in