.. current source of: It also illustrates how adding a booster transistor Q1 can accommodate applications needing current or power beyond Z1’s modest limits. Notice that Z1’s accuracy will be unimpaired because, with whatever ...
.. 1B is which makes V LED = V B 2.5 V. The values of R 6 , R 7 , and R 8 are such that V B limits at the positive or negative power-supply rail when V PROBE is at the logic family’s minimum low or high level, respectively. Figure 2 shows ...
.. reverse bias of the load; some loads might not tolerate this. The 1N4001s block that, and also provide bias for the power-down cutoff of I OUT when +5-V rail shuts down. Note that the accuracy of I C R C = V ADJ is assured by the ...
.. for many applications. This Design Idea describes a portable water-leak detector that uses a common 9 V battery for power (Figure 1). The circuit consumes less than 10 uA during detection mode, and a 9 V alkaline battery has ...
.. heatsink! Also note that R S should be rated for a wattage of at least 1.252/R S . Then there’s the consideration of power up/down transients. When the system is first switched on and C 1 is sitting discharged, and the controller will ...
.. infrared (IR) signals while conserving system power is difficult, and typically requires the inclusion of complex power-management routines in the firmware. You ...
.. circuit of Figure 1 is designed for portable-power applications that require white LEDs with adjustable, logarithmic dimming levels. The circuit drives as many as ...
.. comparator compared to an IC comparator, which was used with an ultrasound application. To set up the test, a special power-supply circuit was designed for the comparator as well as for a crystal-clock module with specified jitter. The ...