The LED lights up signalling that the crystal is good. The electronic circuit cand be used to test crystals with frequencies from 100kHz up to 30MHz. The current consumption is low: around 25mA.

This basic test circuit is a Pierce-gate oscillator ... July 2004. "Quartz Crystal Design Notes," Fox Electronics.

It used to be any good electronics experimenter ... a video that shows essentially the same test [Mousa] uses, although it was on an LC circuit, not a crystal. You do need to be careful you ...

Oscillators may use crystals as precise tuned circuits ... or even some basic test equipment — you can use it to learn the parameters of a crystal. [All Electronics Channel] has the details ...

Their piezoelectric properties (voltage across the crystal deforms it; deforming the crystal generates a voltage) allow them to be the frequency-determining element in electronic circuits.

The Joint Test Action Group (JTAG) was formed in mid 1980s to develop a method of verifying designs and testing printed circuit boards after manufacture. Prior to the development of JTAG, testing and ...

A REMARKABLE electronic circuit made entirely from the cells of an LCD display has been created using software that mimics evolution’s drive for fitness. By reorienting the liquid crystals in ...

Plaintiff SEMICAPS filed suit in the Northern District of California, alleging infringement of U.S. Patent No. 7,623,982, which relates to the testing of electronic circuits using a laser.