| Chip manufacturers are always coming up with ever more sophisticated constant current driver chips for LEDs. We have included this design fo...
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| This design came about when the author wanted better control of his 12 V solar-charged garden lighting installation. It is however a versati...
| Every power supply worthy of the name should display the voltage and current. This compact DC power supply instrument module can be used wit...
| This current-limiting circuit, shown in this example as part of a small bench power supply, could in principle be used in conjunction with a...
| Lots of circuit variations exist on this theme. We would like to add one more, however, that’s not easily beaten for simplicity and reliabil...
| Opamps seldom have an output current drive capability of greater than about 12 mA, and so they are not suitable for use in 20 mA current loo...
| Measuring high-side current becomes a piece of cake when you use the ZXCT10xx range of devices from Zetex. The chips can produce a proportio...
| There are three other designs of opamp besides the familiar type with high input impedance and low output impedance. In this article we find...
| Overcurrent sensors using external low-resistance sense resistors are fairly common. However, the members of a new family of ICs from Maxim...
| To get the maximum brightness and working life out of a high-power LED, it needs to be driven at the optimum specified current. Allowing the...