Integrated Circuit. CMOS, Hex Schmitt Trigger. Description: The NTEB ( Lead DIP) and NTEBT (SOIC) consist of six Schmitt Trigger circuits. HCFBEY from STMICROELECTRONICS >> Specification: IC, CMOS, , DIP14, 15V. CMOS Hex Schmitt Trigger. 20 Volt Rating, Model CDBE. Features. Hysteresis Voltage: V at Vdd = 5V V at Vdd = 10V V at Vdd = 15V.

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Check each oscillator out one at a time, by listening to each output separately. Or, hold the two resistor leads in your fingers mcos squeeze to change your skin resistance. Start with what you had for the last circuit, then:. Handmade Electronic Music Routledge, ; chapter Tom Bug’s BugBrand electronics page. Once we start stringing circuits together, one circuit controlling another circuit… oh, boy.

You should be able to hear the first oscillator switching the tone of the second oscillator back and forth between low to high. Oscillators produce AC signals, which we can amplify and hear as tones. SO those are some basics: We want to mix all three oscillators together. We can do the same thing here. BTW, most chips do different things and have different pin-outs.


CMOS – CMOS – Six inverting Schmitt trigger

So you can get 6 oscillators out of one chip. The 3 k resistors on the right are the mixer resistors. Oscillators can also control other oscillators, making more complex tones.

We used a different integrated circuit the chip last week to build our amps; it had only one coms block in it, a single analog amplifier the right-pointing triangle on the schematic. You can get some pretty complex sounds with just a few basic building blocks, repeated a few times. Or wire in a pot variable resistor to control the pitch.

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Try using variable resistors and start monkeying with the rate of the first oscillator, then the frequency of the second… then both. All 3 oscillators cmoz are now mixed together, out to the amp. This is one of those schematics that omits the power connections, and just shows the basic circuit building blocks although it does show the pin numbers.

After experimenting and finalizing your design, you can transfer it to one of our Oscillator boards to make it more gig-worthy. Get all 3 oscillators happy before continuing. This tutorial shows how to build oscillators on a solderless breadboard.


So we have oscillators, and we can change their frequency by changing the values of either the resistor or capacitors. A sweet setup would cmps 3 pairs of FM oscillators with all three outputs mixed together… speed controls on the slow oscillators, photocells on the fast ones, individual volume controls… you get the idea.

You can also change the capacitor value… swap in some different ones and see what happens. Replace the resistor with a photocell.

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Ov course, you might have something different by now…. On chips like this with multiple elements, all the inverters on the chip are the same, so you can pick whichever one makes the layout easiest. Data sheets also often have sample schematics that can help get you started using a new chip.

In addition to changing them manually, we can also use one oscillator to control another oscillator.