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drozdandconfused
14:49:45 Fri
Jun 25 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Alexandr's board & beer belly :rotflmao:

Looks like he also rigged up a barrel extension off the stock barrel?

  
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Sergey_new_pcb
11:13:30 Fri
Jun 25 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Alexandr's board. Moscow, Russia.


  
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SONYtec
03:13:58 Sat
Jun 12 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

You mean Aleksandr... :tongue:



---
10/02/08 Black '05 Drozd STOCK.
3/13/08 YELLOW '03 DROZD, 9/17/08 full auto mod, 1, 3, Full. ROF mod soon.
07/07 Black '05 Drozd, 8/3/07 resistor mod, 9/20/07 full auto PCB. More to come! (Adjust pot. and solenoid)
Accessories: 8/24/07 PMI HPA tank, remote hose, 9/03/08 JimC barrels and QD adaptors, 10/01/08 JimC CAR stock adaptor. NEED HI-CAP MAGS!!!
 
 
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Sergey_new_pcb
13:10:28 Fri
Jun 11 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

A board for Alexander from Moscow.

http://www.youtube.com/watch?v=FuYoDlhKTG8

  
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windage
03:15:54 Thu
Jun 3 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Thanks again Sergey. I just received my new board. Looks like it works nicely.

  
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Tbkahuna
15:58:32 Wed
Jun 2 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Thanks, Sergey. I'll let you know when it arrives.

The valve should be ready to test by then.

TBK

  
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Sergey_new_pcb
14:10:45 Wed
Jun 2 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Here it is. Already travelling to the other side of the ocean.

http://www.youtube.com/watch?v=TUhOvdWlCaw

  
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Tbkahuna
04:40:16 Sun
May 30 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Sergey,

I am going to need a board! I am working on a high capacity magazine and a new valve body. If all goes well we may see a new frontier for the Drozd. At a minimum I will get to build some new stuff!!

TBK

  
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drozdandconfused
02:19:18 Fri
May 28 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

"From Russia with" an over sized box completely lined in open cell foam cut to fit the New Pcb.



It's pretty much P.O. proof.

  
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mwray
21:47:00 Wed
May 26 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Board arrived yesterday. Thanks Sergey.
[1 edits; Last edit by mwray at 10:31:42 Thu Jul 22 2010]

  
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drozdandconfused
00:38:58 Tue
May 25 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

The postman tried to deliver my board today, I'll be able to pick it up tomorrow morning. That's exactly 2 weeks from when it was shipped. Not bad.

  
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Gat
21:00:33 Thu
May 20 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Just received my shipment from Sergey - everything was well packed and the board is extremely well made! Time to upgrade!!!

  
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Sergey_new_pcb
09:17:17 Tue
May 18 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

http://www.youtube.com/watch?v=3oaacs3d7VE

This board is on its way to Latvia.

  
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wvcowboy78
10:07:35 Sun
May 16 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust


  
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Sergey_new_pcb
16:18:18 Wed
May 12 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Some pictures -- how Russian airgunners install the "button-caps" to push the buttons on the board.





Flexible plastic film is shown with blue color, glue is yellow.

  
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drozdandconfused
05:20:14 Tue
May 11 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Good point SONYtec, even with all the bells and whistles and controls the chargers have, some come with temperature probes to monitor if the battery is getting too hot. Yikes. I think I'll use the velcro.

windage, I'm curious to see what your thinking. I like the simplicity of AA's, but they may not have the high discharge rate that the Lipo's have.

  
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windage
04:39:44 Tue
May 11 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

I have a battery mod I think you guys will like. I am almost done the mod and I'll post pictures very soon. The mod itself is very simple to do and allows you to use regular AA batteries at different voltage levels. It also looks good and won't interfere with your gun at all.

  
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SONYtec
02:35:12 Tue
May 11 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

I personally wouldn't permenantly install a LiPo Battery in the Drozd or BB.

They can explode while charging. The RC guys chage them in a bag so if they do, the cuastic stuff inside one doesn't go all over the place.

They are more critical with discharging, and are easily damaged.



---
10/02/08 Black '05 Drozd STOCK.
3/13/08 YELLOW '03 DROZD, 9/17/08 full auto mod, 1, 3, Full. ROF mod soon.
07/07 Black '05 Drozd, 8/3/07 resistor mod, 9/20/07 full auto PCB. More to come! (Adjust pot. and solenoid)
Accessories: 8/24/07 PMI HPA tank, remote hose, 9/03/08 JimC barrels and QD adaptors, 10/01/08 JimC CAR stock adaptor. NEED HI-CAP MAGS!!!
 
 
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drozdandconfused
23:05:56 Mon
May 10 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Sergey had sent me an e-mail while I was posting this. He said 10-20A would be more than adequate for shot consistency in burst mode. This is good cause there are some packs which produce 20A continuous which are small enough to possibly fit inside the factory stock. I would then drill a port for the charge plug in the stock and wire the battery directly to the board or some type of dummy cells in the battery compartment. The other option is to use a soft compartment velcro'd to the right side of the gun body, since all the switches will now be on the left side. But I'm getting ahead of myself, got to get the board delivered and installed first.:lol:

  
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windage
20:37:16 Mon
May 10 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

This is what Sergey told me when I asked the same question.

"First try to find out what current it can supply in nominal, not stressed mode. This should be at least 5...10 A to have consistent muzzle velocity figures within a burst. The capacity is less important. If it's low, you'll have to charge it more often."


  
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drozdandconfused
16:27:26 Mon
May 10 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

I was considering a battery pack with specs as high as this:

Type: Lithium Polymer
Capacity: 5000mAh
Voltage: 14.8V nominal
Number of Cells: 4
Weight: 506 grams
Configuration: 4S
Dimensions (LxWxH): 160x44x36mm
Maximum Continuous Discharge: 30C (150.0A)
Maximum Burst Discharge: 60C (300.0A)

or more realistically:

Venom Li-Power Series 4S 1P 14.8V 3200mAh LiPo battery with balance connector.

Length: 5.24" (133mm)
Width: 1.65" (42mm)
Height: 1.18" (30mm)
Weight: 13oz (368.54g)
Charge Rate: 3.2A (1C)
Max Volts Per Cell: 4.2V
Max Pack Voltage: 16.8V
Min Discharge Volts: 12V
Continuous Discharge: 30C (96A)
Max Burst Rate: 50C (160A)

Will the board handle this high amperage?

Edit: I'm guessing the gun will draw only what it needs so it is better to have the reserves so it won't be starved for juice. Is this a fair assumption?
[1 edits; Last edit by drozdandconfused at 16:37:39 Mon May 10 2010]

  
Mood:
SONYtec
13:40:56 Mon
May 10 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

It's too bad that there isn't much room to install a commonly bought fuse for the reverse polarity protect circuit.

Fusing the B+ would offer protection in general.

This would be easier for the end user to fix. No room to do it.

Very well engineered anyway.
[1 edits; Last edit by SONYtec at 13:44:51 Mon May 10 2010]



---
10/02/08 Black '05 Drozd STOCK.
3/13/08 YELLOW '03 DROZD, 9/17/08 full auto mod, 1, 3, Full. ROF mod soon.
07/07 Black '05 Drozd, 8/3/07 resistor mod, 9/20/07 full auto PCB. More to come! (Adjust pot. and solenoid)
Accessories: 8/24/07 PMI HPA tank, remote hose, 9/03/08 JimC barrels and QD adaptors, 10/01/08 JimC CAR stock adaptor. NEED HI-CAP MAGS!!!
 
 
Mood:
Sergey_new_pcb
09:25:54 Mon
May 10 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Three boards are travelling to Canada, Florida and California now. Tracking codes are sent in private messages.

These boards have some protection against reverse polarity voltage. There are two black rectangular diodes at the bottom side of the board.

The first one is connected in parallel with batteries contacts. If the polarity is wrong this diode will die in a few seconds/minutes depending on the batteris state, wires/connectors resistance etc. Before it dies forward voltage across this diode will never exceed 1.1 V. When it dies it becomes short circuit and the voltage across the rest of the board will drop to zero. It's enough to replace a 15 cents diode to fix the board.

The second diode protects the board from high voltage pulses generated by the solenoid inductance at the end of each shot. There was such a diode in the original design but I'm going to use different parts now, capable of taking more current in emergency condition. There is a protective diode inside the big transistor.



When the voltage polarity is wrong those two diodes are connected in series and forward biased thus conducting excessive current.



The upper diode now is capable of taking 100 A peak current which increases its chances to stay alive if the user just removes burnt protective diode instead of replacing it. From this moment on all boards will have those additional protective diodes.

Sergey.
[1 edits; Last edit by Sergey_new_pcb at 09:31:11 Mon May 10 2010]

  
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windage
02:18:27 Sun
May 9 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Quote: green_dots at 20:48:58 Sat May 8 2010

More testing.UPDATE. Got my tanks filled. The more testing that I do,the more I learn and the more I am amazed. On co2 it does everything (21.6 volts for all testing) excedingly well. All menus work like a chram. On very high (1600+psi) everything works great. One small problem and it maybe a small problem on all guns and boards. There is some fps spread only at 1500+ psi and more 800rpm. Firing a burst at above 800rpm (6 shot burst at a telephone book) The first 2 bbs go in about 450 pages, the next 2 go in about 150 and the last 2 bounce off. This only happens at 1500+psi and 800rpm and above. If my memory serves me all my guns have had this fps spread. I am convinced it is a battery problem.On my long barrel drozd with the battery pack from a cordless drill, It does not occur. I will be hooking up Sergey board to the gun with the drill pack and do more testing.The 3.6 AAs don't have the mah or massive steady voltage that the drill pack as.Another very important improvement with Sergey board. The DAYS OF TRYING TO TUNE THE POT ARE OVER. The pulse setting is easy and amazing. Just go through the cycle os settings while shooting through the chrony.DONE. The impact can be seen and heard. I still need to do more testing with the drill pack (18 volts) and will report back. Over all I am saitified and impressed with this new board.This board is a quatum improvement. GD.

I am assuming the 3.6 volt batteries are 14505 AA Lithium Thionyl Chloride batteries. If this is so, then it would make sense about the FPS spread at 800 rpm or above.
Electrical characteristics
Nominal capacity 2.4Ah ( 2400 mAh)
Open circuit voltage (at +20C +68F) 3.66V
Nominal voltage (at 1mA +20C +68F) 3.6V

Pulse capability: Typically up to 200 mA

[ Continued ]
View Rest Of Post
[4 edits; Last edit by windage at 02:28:52 Sun May 9 2010]

  
Mood:
drozdandconfused
21:55:24 Sat
May 8 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Awesome, can't wait! Insta-pot.

  
Mood:
green_dots
20:48:58 Sat
May 8 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

More testing.UPDATE. Got my tanks filled. The more testing that I do,the more I learn and the more I am amazed. On co2 it does everything (21.6 volts for all testing) excedingly well. All menus work like a chram. On very high (1600+psi) everything works great. One small problem and it maybe a small problem on all guns and boards. There is some fps spread only at 1500+ psi and more 800rpm. Firing a burst at above 800rpm (6 shot burst at a telephone book) The first 2 bbs go in about 450 pages, the next 2 go in about 150 and the last 2 bounce off. This only happens at 1500+psi and 800rpm and above. If my memory serves me all my guns have had this fps spread. I am convinced it is a battery problem.On my long barrel drozd with the battery pack from a cordless drill, It does not occur. I will be hooking up Sergey board to the gun with the drill pack and do more testing.The 3.6 AAs don't have the mah or massive steady voltage that the drill pack as.Another very important improvement with Sergey board. The DAYS OF TRYING TO TUNE THE POT ARE OVER. The pulse setting is easy and amazing. Just go through the cycle os settings while shooting through the chrony.DONE. The impact can be seen and heard. I still need to do more testing with the drill pack (18 volts) and will report back. Over all I am saitified and impressed with this new board.This board is a quatum improvement. GD.

  
Mood:
green_dots
20:18:17 Sat
May 8 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

How do you get this video to play? GD.

  
Mood:
Sergey_new_pcb
19:18:46 Sat
May 8 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Quote:

check this out:

http://bb.bbboy.net/straferbbmachinegunownersgroup-viewthread?forum=14&thread=13

Great video! I guess it's only the beginning of a series...

Quote:

Do you sleep at all cause I am beginning to think you don't.
I'll sleep when I'm dead :biggrin:

  
Mood:
windage
16:22:29 Sat
May 8 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Quote: Sergey_new_pcb at 15:16:13 Sat May 8 2010

This board is ready for the trip to Florida:
http://www.youtube.com/watch?v=AAWwaXPeQR0

This one is for Windage:
http://www.youtube.com/watch?v=kjeMbEOJhpw

This one is going to LA LA land :biggrin:
http://www.youtube.com/watch?v=VvfH1ZrOJZ4

All boards are tested and packed. I'll send them out on monday.



That's amazing, thank you Sergey. Do you sleep at all cause I am beginning to think you don't.

:rotflmao:

  
Mood:
drozdandconfused
15:38:46 Sat
May 8 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

Ah maestro, I see you've been busy making videos, among other things. So have I, check this out:

http://bb.bbboy.net/straferbbmachinegunownersgroup-viewthread?forum=14&thread=13

  
Mood:
Sergey_new_pcb
15:16:13 Sat
May 8 2010

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Re: New electronics for Drozd (9-24V, 300-1200 RPM, 3-15 mS digital pulse adjust

This board is ready for the trip to Florida:
http://www.youtube.com/watch?v=AAWwaXPeQR0

This one is for Windage:
http://www.youtube.com/watch?v=kjeMbEOJhpw

This one is going to LA LA land :biggrin:
http://www.youtube.com/watch?v=VvfH1ZrOJZ4

All boards are tested and packed. I'll send them out on monday.

  
Mood:

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