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2.4 GHz DYI and MPX Cockpit MM |
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garth 
Platinum (DE) USERID: 347724 Bargain Addict! 
Joined: 10/Nov/2009 Online Status: Offline Posts: 28 |
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 Topic: 2.4 GHz DYI and MPX Cockpit MMPosted: 12/Feb/2010 at 4:06am |
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HI,
want to inform I fitted a 2.4 GHz DYI Corona into a MPX Cockpit MM Transmitter and it works PERFECT. Regards Garth |
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hippo
Gold (AU) USERID: 65778 Newbie 
Joined: 23/Feb/2010 Online Status: Offline Posts: 1 |
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Posted: 23/Feb/2010 at 6:04am |
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Does the Cockpit Tx have a six cell battery? If so did you have have to modify the Corona for this lower voltage?
Regards, Dennis |
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Malfamartin
Platinum (SE) USERID: 201024 Bargain Addict!
Joined: 13/Apr/2009 Location: Gbg Sweden Online Status: Offline Posts: 79 |
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Posted: 25/Feb/2010 at 5:53pm |
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Spec Corona DIY
Size: 38.5*21.8*6.5mm Voltage : 8V - 13V Weight: 5g
Range : more than 1500m Operating current : 100 MA Resolution : 10bit Latency : 22ms Accordingly to my knowledge all boards works with 5v and have a tyristor -current limiter- to bring the current down to the right power. correct me if I’m wrong, but So less than 5v could jeopardize transmitting, but that is not an issue.I have 7,2v batt in my MPX and that works fine.
Edited by Malfamartin - 26/Feb/2010 at 3:05am |
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Have a nice day, unless you already have other plans.
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W3FJW Ron
Platinum (US) USERID: 63218 Forum Admin 
Joined: 19/Feb/2009 Location: Tacoma WA Online Status: Offline Posts: 9067 |
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Posted: 25/Feb/2010 at 6:40pm |
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The Tx modules require 3V no matter what brand they are AFAIK. The voltage regulator may have a drop out voltage of 2 volts in which case 5 volts would be too close and the regulator might not provide the 3V the module needs. Best to be on the safe side and require 8V as that is a standard voltage for 6 AA cells. Some of the Tx I believe use 4AA cells which is 6V and above the min voltage required for safe operation but they are probably using LDO regulators.
Actually, any voltage above 8V is wasted as heat in the Tx. Edited by W3FJW Ron - 25/Feb/2010 at 6:58pm |
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I can only remember half of what I say.... I used to walk on water 'til I found out it was more fun sitting in the boat drinking beer Ron |
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Malfamartin
Platinum (SE) USERID: 201024 Bargain Addict!
Joined: 13/Apr/2009 Location: Gbg Sweden Online Status: Offline Posts: 79 |
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Posted: 26/Feb/2010 at 3:57am |
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It is a long time ago when RC Tx used Alkaline batteries, so I would like to say that 7,2v is standard today as well as 9,6volt is for most Tx. The whole industry is today using rechargeable batteries. The
Too few are like hippo, using questions! Most people believe they got correct information from the producer. MPX and some other brands use 7,2v and I can not understand why 8v is on the safe side. 8v only exists in toys for children, not in toys for men. It is a very simple test for the designer to establish minimum battery voltage to achieve safe operation = 3volt. That is the point when the red LED should start to flash and the piezo to sound. Maybe a bit higher in order to get a safe landing. Many producers also complain about getting too many e-mails, when it actually is their own fault (I have send one to You are probably quite right Ron! My Jeti Duplex states 3-16volt for the DIY kit, and that is smart marketing……………… Many people use diodes to get less voltage when using LiPos in the transmitter to get down to 9,6v, and that is for me like using two or three condoms for safety. The waste is still there. All electronic things have heat waste no matter if it is a TV, car radio or RC equipment. It makes me wonder why so many are concerned about voltage in their Tx and swallow directly using 2-6S LiPo in the plane and using ESC with BEC. BEC is also a current limiter getting warm or hot with waste. It is similar to put a 6S LiPo in a Tx, which is of course possible with the right BEC. |
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Have a nice day, unless you already have other plans.
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mysflyg
Platinum (SE) USERID: 451830 Newbie
Joined: 22/Mar/2010 Online Status: Offline Posts: 2 |
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Posted: 24/Mar/2010 at 10:18pm |
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Could you inform how you did? Perhaps a plane or a skiss.
I will do the same.
Hope on answer.
Old flier.
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rubeuhh
Platinum (BE) USERID: 343320 Newbie
Joined: 29/Jun/2010 Online Status: Offline Posts: 3 |
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Posted: 31/Jul/2010 at 9:00pm |
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can you make a picture how you connected the DIY module to the transmitter?
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