Hi all,
Firstly let my apologize for being a complete newbie and knowing NOTHING about electronics.
You help (and patience) are appreciated.
I want to produce is a device that delivers a 9 volt dc charge to two electrodes at a current of between 0.25 - 3 milliamps.
A dial should control the current at steps of 0.25 milliamps.
A timer is also required between 1 - 60 minutes.
Finally, I've seen on some dc devices (such as tens machines) quote a frequency. Now I understand that an AC device has a frequency as the direction of the current alternates. But what does this frequency refer to if it's a dc device? Or is it's output current alternating if it's quoting a frequency?
All help, (or suggestions where I can learn what I need to know) is very much appreciated.
Thanks for looking and have a great weekend.
Stephen Watson
Firstly let my apologize for being a complete newbie and knowing NOTHING about electronics.
You help (and patience) are appreciated.
I want to produce is a device that delivers a 9 volt dc charge to two electrodes at a current of between 0.25 - 3 milliamps.
A dial should control the current at steps of 0.25 milliamps.
A timer is also required between 1 - 60 minutes.
Finally, I've seen on some dc devices (such as tens machines) quote a frequency. Now I understand that an AC device has a frequency as the direction of the current alternates. But what does this frequency refer to if it's a dc device? Or is it's output current alternating if it's quoting a frequency?
All help, (or suggestions where I can learn what I need to know) is very much appreciated.
Thanks for looking and have a great weekend.
Stephen Watson