flippineck
- Sep 8, 2013
- 358
- Joined
- Sep 8, 2013
- Messages
- 358
I need to come up with a cheap and simple Pulse Width Modulation square wave generator with the following parameters:
Power source: 12V SLA battery
Data low: adjustable (trimmer ok) 0V thru +3V
Data high: adjustable (trimmer ok) +5V thru +12V
Frequency: adjustable (trimmer ok) 50 -100 Hz
Duty cycle: adjustable via a decent knob, 20% thru 80% on a linear dial or slider
Signal distortion not too critical I don't think (exact figures unavailable)
This is for test-feeding a control pin on a smart charge style, alternator.
Given that I have limited test equipment and only fairly basic construction tools at the moment, what would be the simplest, easiest and cheapest way to approach this? Assembling basic components, soldering, basic multimeter testing all possible here but I have no oscilloscope or frequency counting hardware at the moment.
Best I could do to get a sense of what it's producing would probably be an earphone to listen to the output
Is there something ready-built available that would suffice, maybe with some kind of basic readouts?
Thanks for any ideas. Here's the post I'm working from: http://www.msextra.com/forums/viewtopic.php?f=131&t=58716
Power source: 12V SLA battery
Data low: adjustable (trimmer ok) 0V thru +3V
Data high: adjustable (trimmer ok) +5V thru +12V
Frequency: adjustable (trimmer ok) 50 -100 Hz
Duty cycle: adjustable via a decent knob, 20% thru 80% on a linear dial or slider
Signal distortion not too critical I don't think (exact figures unavailable)
This is for test-feeding a control pin on a smart charge style, alternator.
Given that I have limited test equipment and only fairly basic construction tools at the moment, what would be the simplest, easiest and cheapest way to approach this? Assembling basic components, soldering, basic multimeter testing all possible here but I have no oscilloscope or frequency counting hardware at the moment.
Best I could do to get a sense of what it's producing would probably be an earphone to listen to the output
Is there something ready-built available that would suffice, maybe with some kind of basic readouts?
Thanks for any ideas. Here's the post I'm working from: http://www.msextra.com/forums/viewtopic.php?f=131&t=58716