Hi
I am creating a project with the new arduino due and I need to convert the voltage output (0.55v to 2.75v) from the DAC into a range that is linear from -5v to +5v
I have looked through national semi app note 31 and in the upper right corner of page 6 there is a circuit for voltage...
Hi,
I have been given a circuit diagram of a tube based EQ unit and I need some help if anyone could help me I'd be gratefull.
Basically the circuit is in two parts a Tube base amplification stage and a "passive" inductor based EQ circuit that "appears to me" to be in the feedback path of the...
Thanks hero,
I've been working with hv dc ozone up until now so sorry for the confusion,
just so I'm clear could you check my wiring diagram?
Thanks, even
thanks hero,
one question, does it matter which wire of the secondary is grounded? there are no markings on the secondary wires at all, and they are both the same colour.
am I correct in thinking one secondary wire is + and one - that should be grounded? if so how would I identify which is +...
My current thinking is to wire the secondary to the electrode like the image attached,
Since one side of the secondary is contained within a sealed pyrex tube I am presuming this is correct but I would appreciate input/corrections, thanks.
hi,
I am building an ozone generator using a high voltage neon sign transformer and I am a little unsure of wiring. The transformer I have is brand new and runs off 230v and produces 3kv@9ma. I want to be 100% sure of how to wire this safely for obvious reason so I would appreciate your...
"A mic preamp used an input transformer about 30 years ago but now they use an electronic circuit."
Yea, I understand what you mean but there is a certain tonal advantage to using a transformer also, I see what you are saying about the impedance, adding a transformer would be wasting the high...
audioguru: "its input impedance is 10M ohms so why ruin it with an input transformer"
I really need to make this ciruit balanced and add to add phantom power, which is why I thought of adding a transformer, is there another simple way of achieving these functions without the input transformer...
I think I may have been wrong with the output impedance values that I posted, basically the circuit (well two in series will make up the mic pre) will need to be suitable for connection to a line level mixer, after some more reading it seems as if "The impedance of the line input is high --...
so, if i understand what you're saying correctly I need to increase current through q4 such that it can drive the low impedance load but such that it is low enough so as it wont overheat. Is this correct?
I have no idea how to go about running output impedance simulation, I am using multisim...
I know it has been a while since I posted on this circuit but I have been flat out with other projects until now,
so, I have modified the circuit to include diodes between the base of Q4 and ground as you suggested and this has reduced the current to just below 6ma,
I'm not sure how to...
thanks a lot for this i'm glad i have at least biased correctly and i will work on the current draw on Q4 and post updates as/if required,
you've been a massive help cheers
im simulating with multisim 10 with a specific 2sk117gr model, which are the ones I have.
some voltages of circuit in no signal condition
Q1
drain voltage is around 17.3V.
gate sits at 20.2mV
source 133mV
Q4
base 17.3V
collector 36v
emitter 16v
Q3
base 7.5v
collector 16v
emitter 6.81v
i've...