OSBEE hardware questions

[Tablet]

Hello,

I have some doubts about OSBEE.
– Can the H bridge operate with 3V?
– Is the osbee capable of providing one ampere, or more, for the solenoids with 5v of arduino?
– Can it work with 9V latch solenoid? because the output voltage boster is 24V. I saw in the cpp file that the output voltage can be programable.
– Finally, if I use a 9V battery How many times I can activate and deactivate the solenoid? more or less. It is to estimate the battery life.

Thanks,
Regards.

[Ray]

– “Can the H bridge operate with 3V?”
This question isn’t very clear. Do you mean if H bridge can be controlled with 3V logic signal? The answer is yes, and is what OSBee does. It uses a high-side switch (NPN transistor + P-channel MOSFET) to allow logic-level control signal.

– “Is the osbee capable of providing one ampere, or more, for the solenoids with 5v of arduino?”
The H-bridge itself is capable to driving up to 3 amp, however, OSBee is primarily designed for latching solenoid valves, which only require momentary high current to open or close. Its PCB traces are not designed to sustain high current over a long time.

– “Can it work with 9V latch solenoid? because the output voltage boster is 24V. I saw in the cpp file that the output voltage can be programable.”
Yes it can. First of all, the boost voltage is software adjustable — it defaults to 24V, but you can easily change it to 9V by lowering a parameter. Second, even if you don’t adjust the boost voltage, it works fine with 9V latching valve — the energy from the capacitor is dumped to the valve in a very short amount of time, so a moment of voltage higher than specification is totally fine.

– “Finally, if I use a 9V battery How many times I can activate and deactivate the solenoid? more or less. It is to estimate the battery life.”
If you exclude the power consumption of the Arduino itself, just activating/deactivating the solenoids require very little power, so I would imagine a 9V battery can open/close valves many hundred or thousands of times. However, Arduino is likely to be your major bottleneck in power consumption.

[Tablet]

Hello,
Thanks for resolve all my questions. The only doubt is the battery life,
I have thought of using an arduino compatible. In other words, I make a pcb with only linear regulator, atmega328p and compatible pins then the consumption of microcontroller is very less (while sleeping a few microA).

Regards.

[Ray]

OK, as long as the microcontroller is mostly in sleeping mode (and the peripheral circuit does not consume significant current), the battery life should be pretty good. Unless if you are opening / closing valves very frequently, I think the battery life is still dominated by microcontroller consumption.

[Author]

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