| The charger makes cunning use of the properties of a Type 555 timer. The tnternal window comparator of the lC is set to 4.7 V by zener dio...
Amrit Bir Tiwana (23)
| Here is a simple way of making a tape counter that gives a ten-step indication with the aid of two ICs and a seven-segment display. Its g...
| This campact four-digit counter is suitable for many applications, such as clocks, frequency meters, digital voltmeters, tachometers, sto...
| The stepper presented here makes use of nine positions of a 12-position rotary swtch. It is, of course, possible to add the omitted steps...
| The governor described in this article is intended primarily for small 12 V motors that draw a current of not more than 2 A. Many governo...
| This receiver is meant to complement the transmitter described in the previous article. It's design Is based onjust one FET.This has th...
| The proposed transmitter provides an optical(infra-red). that is, wireless, connection to a head-phone. The receiver is described in the nex...
| The frequency probe enables you to listen into the speed of your computer. It is, however, also suitable for use with other digital circ...
| The circuit in the diagram enables the monitoring of two temperatures, t1 and t2. The sensors are NTC reststors R3 and R4, which may be...
| A type 555 timer and some passive components can provide a small converter to provide a negative output of 12 V at a few milliamperes.