Precise over-voltage protection with circuit breaker
Read about a simple circuit breaker that delivers precision over-voltage protection and over-current protection.
Detect leakage of capacitors, semiconductor switches
The low input-bias current of a voltage-follower op amp enables this simple fixture to measure the leakage current of capacitors.
Enabling a simple ohmmeter with gigohm range
Through the use of an external counter and control circuitry, this system can measure resistances in the tens of gigohms.
Testing low-current power supplies
Use this simple dual constant-current-load design, which can be built with inexpensive, common parts.
Two transistors make up high-precision, ac-mains ZCD
Here is a simple two-transistor circuit that can accurately detect the zero crossing of the ac mains voltage.
Exploring digital AC/DC power supply with active clamping
Here's an AC/DC power supply that features an active clamp circuit implementation, which is necessary to reduce over-voltage spikes in…
High-side current sensing methods
There are different ways to accomplish current sensing on a voltage rail. Learn more about these methods.
Spark current-ratio-to-frequency converter with integrator
Here is a precision integrator that generates a pulse train whose frequency is proportional to the ratio of two input…
Recycle potentiometers as handy voltage sources
Read about a circuit that recycles old precision potentiometers that have direct-reading scales into useful laboratory "volt boxes".
Incorporate grounded-switch for Topswitch on/off control
Integrating a couple of components to the control pin of a Topswitch switching regulator enables on/off control.