A twisted tale about a logarithmic relay attenuator - Page 26

Russ White · 16th July 2006, 11:36 PM

One is definitely in the works. But it will likely not be very soon coming, I am just now closing on my old home, and will be moving over the next couple weeks, then I will need to get my new workshop in working order so I can begin working on my hobbies again.

BrianDonegan · 17th July 2006, 12:05 AM

Quote:

Does anyone have thoughts on how to make the JT remote controlled?

Here's one thought...

orthoefer · 17th July 2006, 12:13 AM

Russ, you da man. Good luck with your transition into your new home. Do you envision encorporating a Darwin selector into your remote control too?

Brian, very cool. That's a lot more than one thought. Is that remote device available for purchase? Or at least the board/chips? Nice work.

BrianDonegan · 17th July 2006, 12:18 AM

Schematic of that one...

BrianDonegan · 17th July 2006, 12:21 AM

It's just a prototype I made up... quick and dirty. It uses a Rentron Sony RC5 decoder chip and a quad half-bridge to drive the motor. The motorized pot I got surplus, super cheap, but works. It would be fine with a single 5V VReg, but I am thinking it should use a LM317 for the motor voltage, adjustable, to customize speed. I initially used 12V, but speed made it too sensitive.

orthoefer · 17th July 2006, 12:27 AM

Is the motor too big a load to drive from the JT's 5V supply?

BrianDonegan · 17th July 2006, 12:31 AM

Well, I put a rectifier on the board too so you could tap right off the trafo. I will test it with the JT trafo and balanced JT, but I shoudl be fine. When the motor is at full rotation and the clutch is slipping, it was only drawing 65mA at 12V. Need to check at 5V, but would guess it would be about 150-200mA or so. Shoudl be okay.

Russ White · 17th July 2006, 12:51 AM

Quote:

Originally posted by orthoefer
Russ, you da man. Good luck with your transition into your new home. Do you envision encorporating a Darwin selector into your remote control too?

Brian, very cool. That's a lot more than one thought. Is that remote device available for purchase? Or at least the board/chips? Nice work.

Yes definitely. Brian and I call it the "Uber Controller" because it will control JT,Darwin, and possibly even Kooka, and who knows what else.

Russ White · 17th July 2006, 12:52 AM

Brian I am glad you got that thing working!

Nice!

BrianDonegan · 17th July 2006, 12:55 AM

My wife and son were away for the weekend...

nuff said.

16th July 2006, 11:36 PM	#251
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	One is definitely in the works. But it will likely not be very soon coming, I am just now closing on my old home, and will be moving over the next couple weeks, then I will need to get my new workshop in working order so I can begin working on my hobbies again. __________________ Less pulp more juice Twisted Pear Audio.

17th July 2006, 12:21 AM	#255
BrianDonegan diyAudio Member Join Date: Dec 2004 Location: Rock Ridge	It's just a prototype I made up... quick and dirty. It uses a Rentron Sony RC5 decoder chip and a quad half-bridge to drive the motor. The motorized pot I got surplus, super cheap, but works. It would be fine with a single 5V VReg, but I am thinking it should use a LM317 for the motor voltage, adjustable, to customize speed. I initially used 12V, but speed made it too sensitive. __________________ Twisted Pear Audio

17th July 2006, 12:52 AM	#259
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	Brian I am glad you got that thing working! Nice! __________________ Less pulp more juice Twisted Pear Audio.

17th July 2006, 12:55 AM	#260
BrianDonegan diyAudio Member Join Date: Dec 2004 Location: Rock Ridge	My wife and son were away for the weekend... nuff said. __________________ Twisted Pear Audio

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17th July 2006, 12:13 AM	#253
orthoefer diyAudio Member Join Date: Apr 2006 Location: East TN	Russ, you da man. Good luck with your transition into your new home. Do you envision encorporating a Darwin selector into your remote control too? Brian, very cool. That's a lot more than one thought. Is that remote device available for purchase? Or at least the board/chips? Nice work.

17th July 2006, 12:27 AM	#256
orthoefer diyAudio Member Join Date: Apr 2006 Location: East TN	Is the motor too big a load to drive from the JT's 5V supply?

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