CDUBE from Texas Instruments at low prices and same day dispatch! Orders above £20 Technical Datasheet: CDUBE Datasheet. See all Technical. CMOS Hex Inverter. DATASHEET .. Accordingly, the reader is cautioned to verify that datasheets are current before . 1/6 CD IN. OUT. CDUBE ti CDUB, CMOS Hex Inverter Data sheet acquired from Harris Semiconductor SCHSC Revised September The CDUB-Series.

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It was fed the signal from a switched-capacitor lowpass filter IC and both were together in a feedback loop.

The design is simple and pretty clever with essentially no battery drain until triggered. Replacement Transformer Started by ncag Today at 7: Keep linking good, informative sources. I made some fairly low distortion 0. And now on to the datasheeet. Thanks for the teardown. I need to get one of those. The CD has symmetrical source and datasbeet currents but not as high as 50mA. The sensors could be local, or remote using supplied wire. If they are used as a linear amplifier then they self-bias at an output voltage too low and with low gain.

What we have here is two essentially independent sections.

Watchdog Water Alarm teardown

The CD is recommended instead if it has a single supply voltage. The bare cd4069ub is made on week 17 of Selfdischarge will probably be the main driver of that. Luckily it does not take much to make one on a design this simple.


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Could the frequency of the sound be changed to lets say 1kHz? It works well as a linear amplifier. Board back- all throughole.

CDUBE Datasheet pdf – CMOS Hex Inverter – Texas Instruments

The CD parts that are for sale these days always have a U after the number, that is CDU and this is important. It appears Source and Drain are swapped in silk. It just shares C1 with the rest of the board. Potentiometer Questions Started by norbss Yesterday at Click here to register now. Is the answer 60? While in standby, the only power drain is the leakage through C1 and Q1.

The lowpass filter reduced the 3rd harmonic distortion caused by the compression. No wonder these things last forever on a battery. Thread starter Hero Start date Aug 13, With sufficiently conductive fluid touching the two electrodes, the gate of Q1 gets pulled up and it turns on. To participate you need to register. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. The spec for 2N lists 1uA as a max leakage with no gate voltage.

This alarm has a pretty simple task- sit somewhere quietly and watch for water leak.

Hero Banned Aug 13, It also happens to be where the ground trace connects. THey have different power supply schemes and the output circuitry is different. I’ve read through the datasheets and I’m ashamed to say I’m stuck. The part runs from 3 to 18V, allowing direct operation from the 9V battery. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.


CD is so old, the datasheet is still from Harris. The enclosure is not sealed and if water level keeps rising past the sensing compartment, dxtasheet is no guarantee that the alarm will stay functional.

CDUBE from Texas Instruments

First time I have seen the uCurrent being used as well. The top one detects cd4069kbe and turns the power on. None of my meters could resolve it even when in uA range.

That app note was a great read! C2, I guess, is to even out any voltage spikes when the gate changes state? Its great you even were able to build the schematic from it. The bottom one is just a driver for the buzzer.

CD4069UBE Datasheet Download

Very nice tear down and very in depth. Not much in here and sure looks like the eighties!

They also might melt. The design is nicely compartmentalized, with separate areas for sensor wiring, battery and electronics. Articles Top Articles Search resources. Today we have a somewhat vintage teardown.