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You should consider the CMOS 555. It will be the lowest power solution. It needs only 60uA on and you can put it in sleep mode.
If not, why don't you replace the PNP by a P-MOS.? It will not conduct with 1 V Vgs.
Hi Nodee,
You need to make a circuit little differently. A 6V 3W coil run at 24V will heat like hell (You will have 48W). At 25% duty cycle it will give 12W as the original coil. Normally, once the solenoid has switched, you can decrease the power consumption by 75 - 90 % and eliminate the heat...
Hi, your problem has been solved for several hundred times. You can buy for ~50-100$ a proportional controller from any hydraulic valve manufacturer. I wouldn't waste my time to make it myself as there are some small tricks which will allow you to operate your valve or not. For a few pieces it...
Hi, If you are using a 9V solenoid, you need to charge the capacitor to ~3-4 times higher voltage. During operation, the current will rise in the coil and the voltage will drop in the capacitor. The size of the capacitor should be such that the voltage on the coil should be still more than 9 V...
Hi everyone! The solution is not so simple. Why? because proportional valves have a very ugly tendency to heat terribly. Therfore chopping the supply voltage with a given duty cycle will not give a reproducible current. Furthermore, you have to do something with the magnetic hysteresis of the...
Hi Igru25,
Just use any CMOS timer555. You can generate the pulse time you want. Especially in the range needed by a solenoid. The pulse length is set by a combination of resistance and capacitor. If you put a potentiometer in place of the resistor you can adjust the pulse length to the value...
Hi Harsha_fractal. We make thousands of solenoid drivers and the MCU never hangs up. If you do not observe the problem without load then I would guess the noise comes from the relay. When the contact closes you may generate an arc which will create huge electromagnetic disturbances. Make sure to...
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