Is it possible, perhaps using PWM, to slow down the action of a solenoid while still maintaining most of its force? By way of background, I'm...

Is it possible, perhaps using PWM, to slow down the action of a solenoid while still maintaining most of its force? By way of background, I'm considering a solenoid for pressing a rather firm button. The only one I have at present that can do so reliably is a 24V type that delivers its press too fast and too noisily. Lower voltage types (already owned or researched on ebay or Amazon) seem t...

Hi, How does a solenoid act to focus a beam of electrons that are passed axially through the coil? cheers, Jamie

Hi, How does a solenoid act to focus a beam of electrons that are passed axially through the coil? cheers, Jamie

Project: To get images with my iPhone 6S+ of a fox visiting our garden overnight. One approach I’m considering is to tap the button of a...

Project: To get images with my iPhone 6S+ of a fox visiting our garden overnight. One approach I’m considering is to tap the button of a Bluetooth camera shutter gadget (from CAMKIX) with a 500 ms pulse to a solenoid, triggered in various ways. (I don’t want to crack open the tiny case to attempt that with a circuit mod.) That seems reasonably straightforward. But

"John Nagle" > I need to model the "selector magnet" of a Model 15 Teletype. > This is an electromagnet with an iron core. > DC...

"John Nagle" > I need to model the "selector magnet" of a Model 15 Teletype. > This is an electromagnet with an iron core. > DC resistance is 55 ohms. Inductance is 4 Henries. ** How did yo get that 4H figure?? Iron core solenoids are not pure inductors - they are "lossy inductors" with phase angles of about 45 degrees. ... Phil

Everything that conducts is a lossy transmission line. A solenoid inductor. https://www.dropbox.com/s/b5eae1jwsdscw4k/PC_3.jpg?raw=1 A...

Everything that conducts is a lossy transmission line. A solenoid inductor. https://www.dropbox.com/s/b5eae1jwsdscw4k/PC_3.jpg?raw=1 A series string of surface-mount resistors. A ground plane or power pour. A wound-foil capacitor. A wirewound resistor. A piece of wire in free air. A via. A pcb trace, of course. -- Father Brown's figure remained quite dark and ...

Can someone please help with this project. I am unable to find anything similar in the form of an existing design. The objective is to apply...

Can someone please help with this project. I am unable to find anything similar in the form of an existing design. The objective is to apply a 10Hz test signal, generated with a lab function generator, to two air core solenoids of 50R. OK, here is the different part. One solenoid must be fed with a positive offset signal, and the second with an identical negative offset signal. Gi...

We have one of those $1K high efficiency washing machines. It does work, and clearly reduced our water and gas bill, so I'm not...

We have one of those $1K high efficiency washing machines. It does work, and clearly reduced our water and gas bill, so I'm not complaining. Lately, it has been getting "slow fill" errors, and I tried a bunch of typical stuff before finding the REAL problem. They have a bank of electromechanical relays to operate a bank of solenoid water valves. There is no arc suppression on these relays,...