| This circuit ensures that messages received by a radio or transceiver are automatically recorded on a cassette or tape recorder. lt is as...
All items tagged with PDF and technology (297)
| This circuit switches a mains operated load on and off under the control of two presskeys.
| A simple approach to the problem of frequency doubling a digital signal is shown here. An XOR gate, lC(1a) supplies a needle pulse on the...
| Since the reactance of a capacitor is inversely proportional to the capacitance, it may be used as the basis of determining the value of...
| This circuit, a. d.c.-d.c. converter, is intended to charge environment-friendly batteries in and environment-friendly way. lt is based...
| Many audio circuits need a symmetric power supply of ±12 V. If such a circuit is to be used in a car, the -12 V line must be somehow deri...
| Here is a simple, fairly accurate and linear, full-wave rectifier for small signals (approx. 10 mV to 3 V) with a frequency between d.c....
| Occasionally, problems occur when a power supply does not maintain its output voltage owing to a change in load as when an amplifier is...
| The wideband distribution amplifier is based on a single Type OPA621. This op amp is typified by a very short settling time, a high slow...
| Many audio amplifiers are still fitted with one or two inputs Ior a dynarnic pick-up. Since record players are used less and less frequen...