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 Forum index » DIY Hardware and Software » Thomas Henry designs
Clock triggers not functioning as intended
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xiphocoleon



Joined: Oct 04, 2013
Posts: 30
Location: Brooklyn

PostPosted: Mon Feb 03, 2014 6:01 pm    Post subject: Clock triggers not functioning as intended
Subject description: Triggers with Thomas Henry's Trigger Conditioner
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I am trying to create a clock circuit that will send triggers out to trigger different percussion patches.

Previously, I made a clock circuit, (schematic attached), that ran on 0 - +12V with a 4049 clock and a 4024 sending out triggers in different intervals. This circuit works as intended on the breadboard.

However, if I send the triggers from the above circuit to a percussive circuit that runs on rail-to-rail +/- 12V, it seems like the bipolar circuit doesn't interact appropriately with the 0 - +12V thing.

For instance, if I send triggers to a Twin T oscillator made with a 741 (a la Thomas Henry's design), I just hear the trigger sound come out the output.

I even tried sending my trigger, which went from 0 to +12V on the scope, and looked like it was at least 1ms long, to Thomas Henry's trigger status indicator. Instead of at least getting a 0/+12 pulse from the output of the 741, I got very short spikes that were negative biased so that they went from -/+24V. I am not sure why the 741 was not sending out at least 1ms pulses.

In the end, am I doing something totally wrong by sending a trigger that is powered by 0 to +12 to a bipolar circuit? Maybe this has something to do with AC and DC coupled inputs/outputs?

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