With the Nichibo motor we are using in the new electric mags, I will get over 2500 rpm at the auger. That is great! I can't wait to put one into use.
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Or just do a capacitor mod as needed only? -Cam Is there anything that you have done to the new CB that can prevent that?. And since were breaking ground here, we may have to do the capacitor mod I had to do to prevent the "run-away" motor issue I had on my prototype. Looks like CB #3 is going to be a real winner!!! -Camįorgot to ask: With the higher 2000 rpm mode The Blackbird may require a better motor. Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 mįantastic work Sergey, put me down on your list I'll buy one very soon! Just gotta get some cash coming into my business for the season. It's possible to use three wires to connect an external switch to the plugs on the board and use it instead of the jumper.Īs I don't need to make DC-DC converter any more, the new board price is reduced to USD 120. No need to check voltage regulator temperature in this mode. The new transistor on the board can cope with increased current. All batteries voltage is applied to your mag now. If you want to achieve maximum RPM, just move the jumper to the position closer to the mag connector. If you tend to use 20-24 V batteries and a mag requiring much current, you may need to mount a heatsink on the part, there is enough space for it.ģ. If your batteries voltage is above 20 volts please check the linear regulator temperature after 3-5 minutes of intense shooting. The actual RPM you'll be able to achieve depends on your mag type and condition, let's wait for users feedback.
This mode is safe for Blackbird-type magazines. If your batteries voltage exceeds 17.5 volts and the jumper is in the position closer to the display, mag voltage is limited to 15 volts. The actual RPM you'll be able to achieve in this mode depends on your batteries voltage.Ģ. This means the mag voltage regulator is bypassed and all batteries voltage is applied to mag motor. If your batteries voltage is below 17.5 volts you can put the jumper in the position closer to the mag connector (there are two positions available, see the photo below). As for the mag, you have three options now:ġ. The processor and LED display draw only 5-12 mA so a simple linear voltage regulator can supply them with all they need. This would mean less efficient and more bulky DC-DC converter.
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Now, achieving higher ROFs requires further voltage increase, plus higher voltage applied to the mag means the converter has to supply more current.
But then I had to increase its output voltage from 9 to 14 volts (so in-out difference was reduced). DC-DC converters are efficient when there is significant difference between input and output voltages. Originally, it was implemented because we needed to lower mag voltage from 24 to 9 volts with minimum losses. Here's the ideology behind the design changes: let's say good bye to DC-DC converter, we don't need it any more. It's $10 cheaper (no need for DC-DC converter). Better transistor in mag control circuit.ĥ. Mag voltage is controlled with a jumper (see below).ģ. What it inherits from the previous design:Ģ. Please welcome the board ver.3 (Sergey's board - 2).
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