Update : used a LOG potmeter nice smooth range like it must be.
soldered the potmeter mirrored result like it must be.Turn clockwise(right)higher volume turn anti clockwise(left) lower volume
soldered the potmeter mirrored result like it must be.Turn clockwise(right)higher volume turn anti clockwise(left) lower volume
@Voxxonline: have a look at the measurement-protocol that Uriah attached to the LDRs:
Both pairs are very well matched and you need not worry which pair to use as either Serial or Shunt pair.
You can do a final adjustment, if you like to: apply a constant DC-voltage to the input of both channels. A stable 5VDC would be nice, for example.
Measure the voltage of the output connectors of both channels and adjust by means of the potentiometer, if it is necessary.
Best regards - Rudi
Both pairs are very well matched and you need not worry which pair to use as either Serial or Shunt pair.
You can do a final adjustment, if you like to: apply a constant DC-voltage to the input of both channels. A stable 5VDC would be nice, for example.
Measure the voltage of the output connectors of both channels and adjust by means of the potentiometer, if it is necessary.
Best regards - Rudi
Thx Rudi
I ll do it as you say.
Has calvin buffer helped you with sound quality?
I freed some space for buffer.
I ll do it as you say.
Has calvin buffer helped you with sound quality?
I freed some space for buffer.
Ivan, any additional component (like a buffer, for example) in the music signal's wire will not improve the sound quality! On the contrary!
The line buffer's task is to drive an amplifier with low input impedance (< 20K) or to drive the signal over a long RCA cable.
You cannot use a 4.5V battery.
Your version of the VCPre has 2 onboard 7805 voltage regulators.
One is for the PIC µProcessor and the 5VDC analog voltage, the other one is to provide power to the motorized potentiometer.
A 7805 voltage regulator needs as least 7.5VDC as input voltage.
Please use a small EI38 print transformer rated at 7.5 - 9 VAC.
Best regards - Rudi
The line buffer's task is to drive an amplifier with low input impedance (< 20K) or to drive the signal over a long RCA cable.
You cannot use a 4.5V battery.
Your version of the VCPre has 2 onboard 7805 voltage regulators.
One is for the PIC µProcessor and the 5VDC analog voltage, the other one is to provide power to the motorized potentiometer.
A 7805 voltage regulator needs as least 7.5VDC as input voltage.
Please use a small EI38 print transformer rated at 7.5 - 9 VAC.
Best regards - Rudi
Versatile Pre BOM?
Rudi,
I'm just getting around to building the VCPre. It's next on my list of projects. Is there an 'official' BOM that calls out the component number and their value available. I did find one in the thread, but not sure if it's complete or blessed by you.
Thanks, Rick
Happy New Year too!
Rudi,
I'm just getting around to building the VCPre. It's next on my list of projects. Is there an 'official' BOM that calls out the component number and their value available. I did find one in the thread, but not sure if it's complete or blessed by you.
Thanks, Rick
Happy New Year too!
Rudi - I did see the link to the BOM in the build guide, but alas I only get their home page. Is there something else I need to add to log in to see the BOM?
Thx,
Rick
Thx,
Rick
Mouser BOM?
For those USA DIY'ers, has anyone put together a Mouser BOM for the VCPre and relate PCBs? I can't seem to get to the Reichelt shared cart for this project.
Thx,
Rick
For those USA DIY'ers, has anyone put together a Mouser BOM for the VCPre and relate PCBs? I can't seem to get to the Reichelt shared cart for this project.
Thx,
Rick
BOM
Does anyone have a text-based BOM that's simple enough to upload and attach to a message/post, or even paste into a post? I'm flying blind here trying to manually create a BOM from schematics and PCB layouts! I'd like to get an order in the mail for this projects and others ASAP. I'd rather not re-create the wheel if I don't have to. 🙂 Thanks in advance. - Rick
Does anyone have a text-based BOM that's simple enough to upload and attach to a message/post, or even paste into a post? I'm flying blind here trying to manually create a BOM from schematics and PCB layouts! I'd like to get an order in the mail for this projects and others ASAP. I'd rather not re-create the wheel if I don't have to. 🙂 Thanks in advance. - Rick
Rick, the BoM has been deleted after some time of inactivity (?). I cannot access it either.
I remember that PALMITO did a Mouser-BoM.
Please ask him for his BoM.
I have attached a list of components created by the EAGLE layout software.
The components missing are: the LCD and the LM35 temperature sensors.
Best regards - Rudi
I remember that PALMITO did a Mouser-BoM.
Please ask him for his BoM.
I have attached a list of components created by the EAGLE layout software.
The components missing are: the LCD and the LM35 temperature sensors.
Best regards - Rudi
Thanks so much for the info Rudi. - Rick
That Excel file in the zip was a BIG help once I converted it.
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Sorry Rudi, I erased it a while ago while cleaning up my mouser.com account! I did reply to pm from Rick, but it seems you helped him out a lot more than I did!
Something like this one: Mouser Part Number: 538-22-11-2036 should do it.
The grid must be 2.54mm.
Best regards - Rudi
The grid must be 2.54mm.
Best regards - Rudi
Thanks Rudi. Found it and it's in my order! They ought to make it more easier to find the matching female housing and correct pins. That's always a challenge. 🙂
Rick
Rick
Rudi -
What is the little push-button used for on the VCpre PCB? And, do you have a Mouser part number for it. It was overlooked in my past orders.
Thx. Rick
What is the little push-button used for on the VCpre PCB? And, do you have a Mouser part number for it. It was overlooked in my past orders.
Thx. Rick
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