Great. That's what I was planning on. Could you also include 2 remotes in my order, whenever they are shipped. I just as soon get something I know is compatible with the Pre and will work immediately.
Thanks,
Rick
Rudi,
Do you have a source for the 16-conductor cable with the plugs on each end, or do you fabricate your own? I know the length would be dependent on the internal design and physical layout of the modules, but was just curious. I found a ready-made one on eBay for my original Pre, but that was the last one offered.
Rick
Do you have a source for the 16-conductor cable with the plugs on each end, or do you fabricate your own? I know the length would be dependent on the internal design and physical layout of the modules, but was just curious. I found a ready-made one on eBay for my original Pre, but that was the last one offered.
Rick
I have received the PCBs from the etching-company and have already soldered my own copy.
I have shipped METAL's order and am now waiting for him to receive the small parcel, solder the PCB and implement the firmware.
Best regards - Rudi_Ratlos
P.S.: I have 2 spare kits that I will offer, once I am sure that everything works as designed.
I have shipped METAL's order and am now waiting for him to receive the small parcel, solder the PCB and implement the firmware.
Best regards - Rudi_Ratlos
P.S.: I have 2 spare kits that I will offer, once I am sure that everything works as designed.
Attachments
Gentlemen, dear DIY-friends of the current group-buy: as I have told you already: I "suffered shipwreck" from my latest "digital-potentiometer attenuation schematic" and had to fall back to an analog potentiometer
(similar as shown in the LDRs' schematic or in George Stantschesffs's design).
The NSL-32SR2 - LDRs proved to be too non-linear with my linear voltage-attenuation schematic.
My current "digital solution (MCP42100)" is "too coarse" to do the attenuation and as fallback I will provide you the "old -fashioned" PCBs (look at the attached image), using a dual 100K-log potentioneter to do the LDR-attenuation.
To contemplate with your willingness to wait for the "new RPRE-PCB": I have expanded the PCB (there has been a lot of room left) to include the "Nelson Pass B1-Buffer".
I have ordered a couple of these PCBs several days ago. So: please keep patient!
Best regards - Rudi_Ratlos
(similar as shown in the LDRs' schematic or in George Stantschesffs's design).
The NSL-32SR2 - LDRs proved to be too non-linear with my linear voltage-attenuation schematic.
My current "digital solution (MCP42100)" is "too coarse" to do the attenuation and as fallback I will provide you the "old -fashioned" PCBs (look at the attached image), using a dual 100K-log potentioneter to do the LDR-attenuation.
To contemplate with your willingness to wait for the "new RPRE-PCB": I have expanded the PCB (there has been a lot of room left) to include the "Nelson Pass B1-Buffer".
I have ordered a couple of these PCBs several days ago. So: please keep patient!
Best regards - Rudi_Ratlos
Attachments
Last edited:
Gentlemen: I have soldered the LDRs on the prototype-PCB (Rick's - PCB - see image1) a hour ago and did some measurements.
The PCB "works as designed".
The input resistance ("impedance" of this passive PRE) varies between 10.4K and 9.8K - which is quite o.k. in my eyes (ears).
I am currently using the circuit shown in image2 to do the needed (if ever) fine adjustments on the LDRs, giving an input voltage of about 1.9VDC.
I have not yet received the motorized ALPS - dual 100K potentiometer that I have ordered from ebay.
But this will not contribute any problem - I am sure.
I have not yet tested (measured) the "rudimentary" version of the Pass B1 - buffer (which is part of my PCB), since I do not yet have a suitable PSU to power it.
My favourite is a TPS7A4700 - PSU (image 3), but I myself am not able to solder the TPS7A4700 (QFN package).
IMHO the TPS7A4700 is able to compete with SALAS's shunt - PSU to power the low-current B1 - buffer.
I will do my best and send you your letters the course of this week.
Best regards - Rudi_Ratlos
The PCB "works as designed".
The input resistance ("impedance" of this passive PRE) varies between 10.4K and 9.8K - which is quite o.k. in my eyes (ears).
I am currently using the circuit shown in image2 to do the needed (if ever) fine adjustments on the LDRs, giving an input voltage of about 1.9VDC.
I have not yet received the motorized ALPS - dual 100K potentiometer that I have ordered from ebay.
But this will not contribute any problem - I am sure.
I have not yet tested (measured) the "rudimentary" version of the Pass B1 - buffer (which is part of my PCB), since I do not yet have a suitable PSU to power it.
My favourite is a TPS7A4700 - PSU (image 3), but I myself am not able to solder the TPS7A4700 (QFN package).
IMHO the TPS7A4700 is able to compete with SALAS's shunt - PSU to power the low-current B1 - buffer.
I will do my best and send you your letters the course of this week.
Best regards - Rudi_Ratlos
Attachments
Well, Gentlemen,
I am currently playing around with the setup shown below (attached image 1).
My 2 x 9VAC / 350mA rated R-Core is driving two LT1763 - PSU - PCBs (the layout of which I have done myself), and I am happily driving the two sections (+10VDC, -10VDC, GND) of Nelson Pass' "rudimentary B1 - buffer".
I will go on with my tests tomorrow and check, if the buffer "behaves as it should".
Best regards - Rudi_Ratlos
P.S.: Find attached the schematic of "Nelson Pass' "rudimentary buffer".
I am currently playing around with the setup shown below (attached image 1).
My 2 x 9VAC / 350mA rated R-Core is driving two LT1763 - PSU - PCBs (the layout of which I have done myself), and I am happily driving the two sections (+10VDC, -10VDC, GND) of Nelson Pass' "rudimentary B1 - buffer".
I will go on with my tests tomorrow and check, if the buffer "behaves as it should".
Best regards - Rudi_Ratlos
P.S.: Find attached the schematic of "Nelson Pass' "rudimentary buffer".
Attachments
Last edited:
Gentlemen, find attached an image of my current RPRE-build!
It consists of 2 PCBs: the RPRE-V2.2 PCB and a PSU-PCB to power the integrated "Simplistic Nelson Pass B1-Buffer".
The RPRE features:
- 4 selectable input sources
- LDR attenuation
- Integrated Pass B1-Buffer (which can either be activated or by-passed)
- Temperature display
- Interface to a SoftPowerOn - PCB
- 1x16 LCD to show the relevant information
- All functionality can be controlled via an IR remote control unit
- ...
The offered PSU is either a dual symmetric TPS7A4700 based PSU or (in case that you are not able to solder the TPS7A4700 by yourselfor do not know anybody, who will do this for you)
a dual symmetric LT1763 based PSU, which is easy to solder and does a good job as well.
The sizes are: 100 x 100mm for the RPRE-PCB and 50 x 100mm for the PSU-PCBs.
I have 4 (no more!) of each PCBs (RPRE and both PSUs) left.
The RPRE sounds really very nice!
I will provide you:
- the PCBs (cost of a PCB is 5€)
- 2 pairs of matched LDRs (the 2 pairs cost 20€)
- a pre-programmed PIC16F688 µProcessor (cost is 5€)
- a pre-programmed Grande Seki remote control unit (cost is 15.50€)
- Builder's Guide and BoM
If you are interested: please tell me.
Best regards - Rudi_Ratlos
P.S.: The PSU shown on image 1 is my prototype Dual-TPS7A4700 - PSU.
It consists of 2 PCBs: the RPRE-V2.2 PCB and a PSU-PCB to power the integrated "Simplistic Nelson Pass B1-Buffer".
The RPRE features:
- 4 selectable input sources
- LDR attenuation
- Integrated Pass B1-Buffer (which can either be activated or by-passed)
- Temperature display
- Interface to a SoftPowerOn - PCB
- 1x16 LCD to show the relevant information
- All functionality can be controlled via an IR remote control unit
- ...
The offered PSU is either a dual symmetric TPS7A4700 based PSU or (in case that you are not able to solder the TPS7A4700 by yourselfor do not know anybody, who will do this for you)
a dual symmetric LT1763 based PSU, which is easy to solder and does a good job as well.
The sizes are: 100 x 100mm for the RPRE-PCB and 50 x 100mm for the PSU-PCBs.
I have 4 (no more!) of each PCBs (RPRE and both PSUs) left.
The RPRE sounds really very nice!
I will provide you:
- the PCBs (cost of a PCB is 5€)
- 2 pairs of matched LDRs (the 2 pairs cost 20€)
- a pre-programmed PIC16F688 µProcessor (cost is 5€)
- a pre-programmed Grande Seki remote control unit (cost is 15.50€)
- Builder's Guide and BoM
If you are interested: please tell me.
Best regards - Rudi_Ratlos
P.S.: The PSU shown on image 1 is my prototype Dual-TPS7A4700 - PSU.
Attachments
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