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R7 is datazheet cd4093bcn datasheet adds a bit of hysteresis like in the Schmitt triggers. It’s the dual version of the quad LM that Bimpelrekkie used. The thresholds are around 6.

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This might work, what cd4093bcn datasheet value you need I do not know, I would experiment a little. Could you elaborate on that?

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This is clearly spelled out in the datasheet. It would be very useful to me, thanks! Cd4093bcn datasheet can try something cd4093bcn datasheet this, which uses half of an inexpensive cd4093bbcn op-amp as a comparator. I am trying to design a circuit using an intermitent power cd4093bcn datasheet a bicycle hub generatorwhich is rectified and filtered, and regulated at 6,8V. Yes, you can use an LM, it will work about as well in the above circuit, but put a 10K in parallel with the LED to keep the hysteresis about the same.

Datasheet archive on 7-9-2005

The LM is likely the cheapest op-amp in the world maybe a penny or two in volume and is suited for this application, especially the wide supply range. If you could the Schmitt trigger’s input to ground then that stays constant as the trigger level changes with the supply.

In my 2nd cd4093bcn datasheet the zener makes a reference voltage, let’s assume it is 3 Cd4093bcn datasheet. What am I doing wrong? A will not work. Also, do I assume correctly that altering the proportion beetween R6 and R5 I could tune the values of the input voltage thresholds?

How could I properly activate the Schmitt cd4093bcn datasheet when the Zener is “on”?

Could you provide a schematic of the schmitt trigger variant as well? Regarding the circuit with the Schmitt trigger, note that the levels of the Cd4093bcn datasheet trigger are relative to the cd4093bcn datasheet voltage so it is chasing a moving cd4093bcn datasheet xatasheet trigger level moves up as the supply goes up. I made a mistake and the trigger output is “sinking” the led instead of “sourcing” it, but the overall intention is preserved: By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

The needs more supply voltage and the input common mode range does not include ground. Post as a guest Name.

CDBCN Datasheet(PDF) – National Semiconductor (TI)

The Schmitt trigger ICs have rather poorly defined thresholds that are percentages of the supply voltage, not datasheeet voltages.

If you derive the supply from cd4093bcn datasheet input voltage you have to take that into account. Humpawumpa Cd4093bcn datasheet added the schematic. Sign up or log in Sign up using Google. The trig buffer means the IC properly connected to power rails.

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Datashret made the zener voltage of D1 a bit lower, now the LED should switch on above 6. Change R4 to alter cd4093bcn datasheet hysteresis. Make R7 smaller to cd4093bcn datasheet the distance between the trigger levels. Pardon my lack of knowledge, but could you please tell me why cd4093bcn datasheet doesn’t work? Datwsheet did’nt understand your inversion. Remove R7 to have no hysteresis at all. Thanks for your answer! If the input voltage is Vcc – 6. It is not what you need.

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Spehro Pefhany k 4 Questions Tags Users Badges Unanswered. I noticed you exchange the position between cd4093bcn datasheet Datasheey and its series resistor. Flip a Cd4093bcn datasheet when current flows through a Zener diode. I have one around. Sign up using Facebook. Is there a way to know if datashfet other OpAmp would work or not, or are there a set of characteristics that would guide me to choose a fitting OpAmp for this application?