HEFBP from NXP at low prices and same day dispatch! Technical Datasheet: HEFBP Datasheet Logic Family / Base Number: HEF An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters . HEF Hex Inverting Schmitt Trigger. For a complete data sheet, please also download. The IC04 LOCMOS HEB Logic Family Specifications HEF.

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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.

I finally had the time to play with those a bit: A light-dependent-resistor photocell is a great option. Otherwise you can lean on the LDRs again, and make yourself a light-dependent volume control by adding an LDR to the voltage divider that I suggested above to get hsf40106 signal down to line levels. That is a great link-thanks: You can do this with a simple voltage divider dwtasheet below. For all you coders and script kiddies out there check out bytebeat.

HEF40106 Datasheet

You can then use light to control the pitch by waving your hands around, which is kinda cool. And if you like flip-flop octavers, check out the next installment. First, they make spikey demands on the power supply as the internal transistors are switching.


When you release the button, the capacitor will provide enough charge to run the circuit for a little while, smoothing out the release of the note.

Logic Noise: Sweet, Sweet Oscillator Sounds | Hackaday

It is hands-down my favorite project ever. For my wife, about three. What is with the auto download on the vimeo vid next to the bottom?

By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Taming the Wild Shift Register. Tom Bug’s BugBrand electronics page. Also, great job s on your noise modules.

Test the matte side of a bunch of tapes with an ohmmeter first before you go ripping them out of the cassettes. The ICs you hear are: Because the input voltage is low, the output is set high. A quick way to improve on this circuit is to add a fairly large 10uF to uF capacitor just after the switch.

A practical circuit would look something like this: His crazy experiments with contact microphones and thumpers speakers driven to hit things are fantastic.

Check each oscillator out one at a time, by listening to each output separately. All 3 oscillators signals are now mixed together, out to the amp.


Next step is adding duty cycle control to the hef4006 wave: Oscillators produce AC signals, which we can amplify and hear as tones. The resistor limits the output current to keep the chip in spec. Once we start stringing circuits together, one circuit controlling another circuit… oh, boy. Ping-pong Stereo, Mixers, and More.

Looking forward to the next one. AND8 8 AND gates, wherein one side is controlled by a shift register and the other side is controlled by whatever signals you inputand MixMe8 a passive summing mixer. When the output voltage gets a tiny bit above the threshold, it pulls the input up with it, and it switches the output low. A sweet setup would be 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.

When the second oscillator is high, it will conduct through the diode and keep the input on oscillator one always high, effectively turning it off.