Tapes for electric fences are available in various qualities and forms, with differing characteristics. They are usually made by interweaving threads in polyethylene, nylon, or some other sy... Read more
The simplest way to make an adjustable constant current source is to use a voltage regulator in a suitable configuration: an example of what is needed is given in the LM317 datasheet. Howeve... Read more
Overall, electromechanical scooter starter solenoids are cheap enough — but the downside is that they’re not very reliable. The contact resistance increases over time, the coil can be open-c... Read more
Hall sensors can of course be purchased but making them yourself is far more interesting (and satisfying)! According to the theory the crucial thing is to use a touch layer that’s as thin as... Read more
In this circuit, the Elektor ATM18 [1] is in charge of communications and represents the master unit, while the DS18S20 sensors are the slave units. The DS18S20s respond to the orders from t... Read more
If you’re short of inputs on your amplifier, but it has an input for a magnetic pickup with RIAA correction, this very simple project will et you convert this into a high-level linear input,... Read more
A simple way of measuring the amplitude and phase difference between two high-frequency signals is provided by the AD8302 from Analog Devices (www.analog.com). The two input signals A and B... Read more
This tester is intended to quickly check whether a transistor is functional or not and possibly also select two or more transistors with (approximately) equal gains. This is about the simple... Read more
A temperature measurement system with up to eight distributed temperature sensors can be realized using only a single signaling lead. This objective is supported by the Maxim MAX6575 tempera... Read more
ICs for measuring currents usually employ external sense resistors with values of a few tens of milliohms. Not only are such resistors difficult to obtain, the circuit board layout can have... Read more
