New answers tagged cmos
I don't know if the arduino can cooperate or power the OR CMOS. There are many models of Arduino and many clone or compatible Arduino-like devices. An exact answer depends on exactly which you have. An Arduino typically has a 5V regulator and a 3.3V regulator and can be USB-powered (which may make a difference to the current it can supply). You can ...
The "5V" pin provides 5V from the board. The "3.3V" pin provides 3.3V from the board. See the datasheet(s) as to which you can/should connect to Vdd. One of the "GND" pins (doesn't matter which) connects to Vss. Don't forget to tie unused inputs on the logic chip either high or low. And don't connect a 5V output to a 3.3V input.
You need a series base resistor on that 2N2222, to limit the current. 10K will do. If you want to run your 7555 from 9V, one way to translate that to 3.3V or 5V CMOS/TTL levels is to connect it to a transistor or MOSFET and use the open-drain output to drive the TTL or CMOS input (pull up to the power supply of the logic). Another method is to use a CMOS ...
If you run the CMOS from the same supply voltage there should be no problem in directly connecting the 555 to a CMOS input. The TTL chips are pretty much limited to a supply of around 5V +/- 0.5V. This may be an issue. If the 555 is running from a 5V supply they can be directly connected as the output of the 555 is both source and sink (sink being required ...
As noted, adding a resistor to the desired "idle state" voltage will cause the output to swing to that voltage when the 4066 is disabled. If one would like the output to stay at its present voltage when the 4066 is disabled, and if one is driving a high-impedance load, one may instead use a capacitor. If a capacitor is used, then while the 4066 is enabled ...
You need to put low-impedance loads on the outputs in order to minimize the effect of DC (resistive) and AC (capacitive) leakage through the 4066.
You can easily see the characteristic curves in any MOSFET datasheet. http://www.ti.com/lit/ds/symlink/csd19501kcs.pdf You can also see the empirically derived equations if you Google a bit. http://en.wikipedia.org/wiki/MOSFET Finally, you can use any of the free SPICE simulators to set up a quick simulation and run the curves yourself. ...
In general, electron tunneling is based on the quantum mechanical concept that the "wave function" of the electron — a function that describes the probability of finding the electron in any particular position — does not end abruptly at the surface of a conductor (or semiconductor), but can extend all of the way through an otherwise impassable ...
How do they work? They have integrated charge pumps to create internal supply voltages that are greater than ±25 V. Is it simple to build a circuit like this out of discrete parts? Possible? Yes. Simple? Not particularly.
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