One of the core features of the scientific community is the concept of “peer review” where any claims made by a scientist are open to be analyzed and reproduced by others in the community for ...

Q: I have a tenant who complained that a light fixture wouldn’t light. After I replaced the switch, the light still wouldn’t come on. I realized that all the bulbs were out. Anyway, is there a way to ...

No multi-meter? For troubleshooting most household things, a continuity tester is extremely handy. And as it turns out, you can make your own from the dollar store for next to nothing. [Carlyn] shows ...

In addition to basic continuity testing, the Model ST1000 hand-held SCSI cable tester will display the presence or absence of TERMPWR, indicate whether the bus is SE, HVD, or LVD, and display the ...

USB-C cables get no respect. Most people shop for the lowest-priced cable and call it a day under the assumption that they are all the same. They’re not though, and here’s how I weed out the good ...

This simple circuit uses a 741 op-amp in differential mode as a continuity tester. The voltage difference between the non-inverting and inverting inputs is amplified by the full open loop gain of the ...

The situation: I rent a place, it has network cabling installed (no conduit) and the cables from the rooms terminate in one room where I have the router etc. I ended up installing some of the wall ...

The CAT Field Tester from Command Access is a lightweight, portable power source for field-testing mortise and cylindrical locks, motorized and solenoid-driven exit devices, electric strikes, etc., ...