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Remote control kits

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#303
RelVol3 with pot
Hello mikkal,
I'm want to use an RelVol 3 board with the vol1 controller and want to control the volume like Tarun with a pot, because I too think that this is the best way to read out the volume-setting, esp. when you have little kids.
Can you describe the soulution with the ADC ?
It would be great, if you would provide a pcb for this.

Another question:
I have a Prasound DAC 1600 and a diy Aleph 5 and until now I drive the aleph unbalanced with an 100 k Ohm alps-poti to control the volume. I know it is not the best way to do that but I had the alps in my draw-box and the cables are short asnd I can get enough maximal level. But now I want to go balanced with the relvol3 and still dont want to build an active pre-amp, so what resitor kit should I use with the rel vol3. I think it should as low as possible but I don't know what is a safe load for my Parasound-Dac. I think it should drive the 5k Ohm relvol3 or mabe even a lower load.

Thanks for answers,
Dirk
 
#304
DFroehlich said:
RelVol3 with pot
Can you describe the soulution with the ADC ?
Click to expand...

The idea is to use a parallel-output ADC chip that can do constant conversions. It looks like the National ADC0803LC is an option. You connect the analogue input to the pot, and the parallel data from the ADC to the relay drivers.

It would be great, if you would provide a pcb for this.
Click to expand...

I think I will - but it will take a couple of weeks at least. I would make the board using a µcontroller instead of the ADC chip, and just do the conversion in software. That saves the (often not cheap) ADC chip, and the board could then be used to control all the different attenuator types.

Another question:
I have a Prasound DAC 1600 and a diy Aleph 5 and until now I drive the aleph unbalanced with an 100 k Ohm alps-poti to control the volume. I know it is not the best way to do that but I had the alps in my draw-box and the cables are short asnd I can get enough maximal level. But now I want to go balanced with the relvol3 and still dont want to build an active pre-amp, so what resitor kit should I use with the rel vol3. I think it should as low as possible but I don't know what is a safe load for my Parasound-Dac. I think it should drive the 5k Ohm relvol3 or mabe even a lower load.
Click to expand...

Most balanced output drivers are made to handle 600R loads - but they often like easier loads. 2*5k resistors should work fine in most cases.

Best regards,

Mikkel C. Simonsen
 
#305
Looking for a response

I ordered online through your shopping cart on 9 April, and also remitted payment through Paypal the same day. The transaction is showing up on my credit card statement. But I haven't heard from you since then. Is my order okay? Can you just confirm whether you've received my order and that the amount calculation. ship-to address, payment status, etc are okay? I believe my order number is 2279.
 
#307
jacq. said:
I also have a paid order #2282 with no payment confirmation from Dantimax. There seems to be a connection problem with is internet provider or something with is email service provider.
Click to expand...
I emailed Mikkel a couple of times before placing the order; he replied quite promptly. I then placed the order. After there was no acknowledgment from him, I emailed at least twice since 9 April. He's never replied to any of them. I thought he must be busy, out of station, on a holiday, etc. But on 12 April, he's posted on this forum. So it does not appear to be a case of email connection problem, nor his unavailability. It's something else. I guess we'll wait ... 🙁

We think we have problems but for all we know, maybe Mikkel has much bigger problems in his personal life...let's wait, and wish he'll figure his way out... :xeye:
 
#308
mcs said:
As some people here may know, I have designed some remote control boards.

So far I have a small board for controlling a motorized pot, and two different boards for "passive preamps". A lot more will be added, when I have to time to get it finished 😉

You can read about them here: http://electronics.dantimax.dk/

And you can read some of the background info on my personal website.

Best regards,

Mikkel C. Simonsen
Click to expand...

Hi Mikkel

I have seen your nice projects but unfortunatelly to late. I have implemented already my project, an all discrete device composed preamplifier splited in two seperate units. In the one included the Control board, the display and the keypad board and the analog supply unit. In the other unit included the main preamplifier boards. I quote bellow photos.
For the developement of this big project, i have spend 5 months (if we subtract one month of inactivity due to a personal accident and 2 months yet because my mother's surgery treatment in his left knee, then remains 3 months of clear work).
I have not problem with analog electronics and this project have builded from the zero, begining from the scratch on my notepad. My problem found in the MCUs and my cnoweledge about assembly codes it is limitted in few things and concretelly i am a little familiar only with the old ST microcontrolers which based on the Von Neuman architecture instead the much faster MCU such as Microchip or Atmel which are based on the Harvard architecture. Because i am not stupid, for the digital control of my project i had based on the help ofe one old friend, an expert in C++ language, which finally proved as a "FRIEND" because from the next day of our discusion about the control unit and the agree, he started to ask from me borrowed moneys. To not misunderstand me, i had not mine moneys and i was debited then about 1500Euros in my bank, and with the addittion of these borrowed moneys to help my "FRIEND" about 1000Euros, my debt in my bank it touches now the 2500Euros. This "FRIEND" prompted me to incorporate a PIC18F4520 to control the two units, as he is familiar with Microchip MCUs. Then, i followed his advice and you can see in the photos the result. May i point out that, to minimize the expenses because my limitted budget, all the boards are maden in home from my hands. You can detect it from the soldered wires which bridges the tracks from the component to the solder side.
Because i am honest, from the begining i told to the "FRIEND" that i wish to pay him for its work, but the foxy type he told to me "by no way, i will offer the development of program as a gift to you". Now i have find some persons which with 150Euros they accept to develop the code for my project.
Before 2 weeks, at least i finished the boards, and you can see that are ready for an in circuit programming. But the "FRIEND" disappeared! No one response to my calls, and i know very well from other persons that he is not death and it is plenty of health! I remembered that, under my desperation, i told to him before his disappear (because i started to suspect that) this: I donate you, your debt of 1000Euros to me, but please spend 2-3 days for developing the program for the MCU. Concretelly, i had collect all the necessary data of timing of each device and also a long table with the logic (with words) sequence of program with the appropriate delays, startup procedures, some elementary only display indications etc.
This is my little story untill now.
About your projects speaking now, i find them very simillar to this which needs my preamp. There are some obstacles of course, and i don't mean that your projects are based on ATMEL MCUs instead mine in PIC. As i read in your site, you are using the C language then there is no problem, the only that needed it is an interpreter for the PIC machine language which usually it is offered as gift from all the companies. The problem it is if you not have a MPLAB ICD2 programmer (addressed mainly for the new PIC18Fxxxx series MCU). This is not an obstacle to me, because i can remake a new control PCB suitable for the Atmel.
The second problem, it is that i need at least 36 control lines (7 inputs and 29 outputs) and the PIC18F4520 of DIL40 pins it is in its limits exactly and this is because it incorporates internally its own oscillator.
The third problem it is that the relays that i use, except 4 all the other 20 are not of simple type with single action, instead are of latching type with double coil and thus they need the double number of commands. The simple command of ON and release it is not enough. The latching type relays are bistable and need a SET and a RESET command. The use of such type relays has the benefit that their contacts locked with the assistance of a mechanical armature in one place by applying a pulse of 5ms duration in its coil. Then the further apply of a voltage in the coil it is unuselless thus the coil it is inactive and this is the benefit of not producing electromagnetic interference in the small input signal level.
For your information, i quote except the photos, some other characteristics of the parts used.
1. The IRDA in the display board it is VISHAY TSOP34836 (36KHz)
2. The protocol that i select it is such yours the RC5. I don't know if the remote control of Philips appeared in the photo (RC8530) it is appropriate for the transmit.
3. The command buttons are as usually the 6 of the main functions in the display board. The red led at right it lits in StBy mode.
4. The backlit LCD display it is of big size but only of 2X16. Its brand it is "EVERBOUQUET MC1602J-SBLW" and you can find it in the Farnell site under the code 944-9078 for further informations.
5. On the display i want indicated few things: in the upper line "INPUT: XXXXXXXX" with the word INPUT permanent, only the right word will be changed according to the input selected. In the bottom line: "VOLUME: XX%" or "VOLUME: MUTE" when in mute mode and the word MUTE flashing, the word VOLUME will be permanent. Only these.
I know that i place you in thought with this post. Are you in place to develop the code and simultaneously to pass in big projects of Hi-End class (the code needed it is not so different from the code that you are use in your projects) for the PIC18F4520 (this PIC it has also an elementary internal non volatile flash memory to keep the last state before the deactivation of the unit ie it remembers and activate again the last used input after a new activation). Are you at least in place to make it in your Atmel MCUs? How much the cost approximatelly (don't be hesitating to say a price, i am not a miser, ie for 50 to 100Euros up or down from the approximate cost when the project finished i will not start to grizzling). As for my demands, the only that i wish it is a logic cost and you can understand this.
Because it is a sensitive case, you can send me a private e-mail with your propositions if you decide to build the code for this project.

Also this post it is addressed in any one who it is in position to make this job.

Fotios

This is the analog preamplifier mainboard. The little discrete operational amplifier boards are not included here
An externally hosted image should be here but it was not working when we last tested it.


This is the control board which of the heart it is the PIC18F4520
An externally hosted image should be here but it was not working when we last tested it.


This is the display - keypad - remote sensor board
An externally hosted image should be here but it was not working when we last tested it.


This is the only remote control that i found in my little place of 30000 habitants, for brevity to end my project
An externally hosted image should be here but it was not working when we last tested it.
 
#312
Re: Re: Remote control kits

fotios said:
As i read in your site, you are using the C language then there is no problem, the only that needed it is an interpreter for the PIC machine language which usually it is offered as gift from all the companies.
Click to expand...

C as actually quite different from one MCU to another, as the different compiler companies "invent" there own C-extentions. A lot of the code is also time critical, so it takes some work to "translate".

The second problem, it is that i need at least 36 control lines (7 inputs and 29 outputs) and the PIC18F4520 of DIL40 pins it is in its limits exactly and this is because it incorporates internally its own oscillator.
Click to expand...

You can get MCUs with 48 or more I/Os - that's no problem. It's probably better to just use I/O extenders instead though.

I know that i place you in thought with this post. Are you in place to develop the code and simultaneously to pass in big projects of Hi-End class (the code needed it is not so different from the code that you are use in your projects) for the PIC18F4520 (this PIC it has also an elementary internal non volatile flash memory to keep the last state before the deactivation of the unit ie it remembers and activate again the last used input after a new activation). Are you at least in place to make it in your Atmel MCUs?
Click to expand...

Yes, this should all be possible. Just send me an e-mail, and I will have a look at it when I get home (where I don't have to pay by the minute...).

Best regards,

Mikkel C. Simonsen
 
#313
Re: Looking for a response

tcpip said:
I ordered online through your shopping cart on 9 April, and also remitted payment through Paypal the same day. The transaction is showing up on my credit card statement. But I haven't heard from you since then. Is my order okay? Can you just confirm whether you've received my order and that the amount calculation. ship-to address, payment status, etc are okay? I believe my order number is 2279.
Click to expand...

I sent a lot of parcels last Saturday, and yours was one of them.

Best regards,

Mikkel C. Simonsen
 
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