.. constant sink current of: It also illustrates adding a booster transistor Q1 to accommodate applications needing current or power beyond Z1’s modest TO92ish limits. Notice that Z1’s accuracy will be unimpaired because whatever ...
.. (µPs) that can produce a PWM clocked at 20 MHz. However, the supply currents running through that IC’s power supply bonding wires can cause voltage drops. This means that the PWM signals don’t quite swing to the ...
.. you have a load with a variable or poorly specified resistance and want to regulate the power applied to it (a heater for example), merely controlling the voltage or current will not work, as in both cases ...
.. to bulkier ON/OFF switches for DC circuits. The circuit has a fairly simple explanation. U1 is a counter. During power on, R2/C2 resets the counter to zero. When you push PB momentarily once, a pulse is generated and shaped by a ...
.. 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 ...