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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. Start with what you had for the last circuit, then:. You can get some pretty complex 41006 with just a few basic building blocks, repeated a few times. The 3 k resistors on the right are the mixer resistors. So we have oscillators, and we can change their frequency by changing the values of either the resistor or capacitors.

This tutorial shows how to build oscillators on a solderless breadboard.

We can do the same thing here. You can also change the capacitor value… swap in some different ones and see what happens. After experimenting and finalizing your design, you can transfer it to one of our Oscillator boards to make it more gig-worthy.


In addition to changing them manually, we can also use one oscillator to control another oscillator. Tom Bug’s BugBrand electronics page.

You should be able to hear the first oscillator switching the tone of the second oscillator back and forth between low to high. A sweet setup would be 3 pairs of FM oscillators with all three outputs mixed 401066 speed controls on the slow oscillators, photocells on the fast ones, individual volume controls… you get the idea.

Get all 3 oscillators happy before continuing. Once we start stringing circuits together, one circuit controlling another circuit… oh, boy.


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. 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. Data sheets also often have sample schematics that can help get you started using a new chip. Or wire in a pot variable resistor to control the pitch.

Oscillators can cos control other oscillators, making more complex tones.


CMOS – CMOS – Six inverting Schmitt trigger

All 3 oscillators signals are now mixed together, out to the amp. Handmade Electronic Music Routledge, ; chapter So you can get 6 oscillators out of one chip. We used coms different integrated circuit the chip last week to build our amps; it had only one circuitry block in it, a single analog amplifier the right-pointing triangle on the schematic.

Oscillators produce AC signals, which we can amplify and hear as tones. Try using variable resistors and start monkeying with the rate of the first oscillator, then 4106 frequency of the second… then both.

Ov course, you might have something different by now…. We want to mix all three oscillators together.

Or, hold the two resistor leads in your fingers and squeeze to change your skin resistance. SO those are some cmow Replace the resistor with a photocell. BTW, most chips do different things and have different pin-outs.