I would like to shorten the momentary output from the sc-2 to the up and down momentary outputs . Currently these outputs
are too long and not as realistic as a finger pushing and instantly releasing the up or dwn button.
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You'd have to add a circuit to the output I suspect. My guess is something like a capacitive discharge circuit that would momentarily pulse a relay when triggered.
Thanks Gunrunnerjohn!
I'll look into it. I have always appreciated reading your posts
Challengerjack
Is the problem that the SC-2 momentary outputs have a minimum on-time that is too long? What is that time?
For example, the MTH AIU momentary "ACCessory" relay outputs fire a minimum of 0.2 seconds no matter how briefly you press the remote ACT button.
Another option is to look at low-cost ($2-3 on eBay, free shipping from Asia) relay timer modules. These can be programmed to fire their relay for, say, 0.1 seconds even if triggered for a longer interval. Depending on what you're doing, some of these modules can be programmed to send a sequence of timed relay triggers. I recall an OGR thread where the goal was to automatically generate a series of 20 (or whatever it was) pulses to send Gabe all the way up the ladder.
As an aside, if going with capacitive discharge, look at the $1-2 eBay relay modules that have external triggers. This may be techno-babble, but the idea is rather than driving the relay coil directly, the module has a buffer circuit which lowers the relay coil current - 100 times less current or so. This generally means a much smaller capacitor
