| The modem off indicator is intended especially for serious Internet surfers. It will be seen that the circuit of the indicator cannot be...
H. Bonekamp (119)
| The simple indicator presented in this article may be combined, in principle, with any circuit that contains an LED bar display driven b...
| We are surrounded by batteryoperated equipment of all kinds, and this array is growing still. Manufacturers and designers lean over back...
| At first glance, the circuit in the diagram does not look out of the ordinary, and yet, it is. This is because it combines two characteri...
| The oscillator shown in this article is frequently used in digital circuits and may, therefore, look very familiar. Many readers may not...
| The programmer is based on an AT89S8252, which is an 8052- derived IC with a flash ROM of 8 Kbyte and a data EEPROM of 2 Kbyte. The ROM...
| The humidifier circuit is based on a special humidity sensor Type NH-3 from Figaro. Depending on the sensor output, the circuit drives a...
| The input resistance of a.c.-coupled op amp circuits depends almost entirely on the resistance with which the d.c. setting is determined...
| Active rectifiers often consist of an op amp circuit with diodes in the feedback loop. Such traditional arrangements work very well in m...
| Parking in crowded streets often causes one’s car to bump into another one. Even though this normally happens at very low speeds, it shoul...