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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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TELEPHONE DIALER & DIALING RESTRICTOR sa DUAL-TONE MODULATED FREQUENCY x DIALER (TELEPHONE) x TELEPHONE RESTRICTOR xx TELEPHONE Telephone dialing by computer. Touch-tone dialing device will dial a computer-stored phone number in less that 1-second. Estimated cost: $20. A telephone-dialing microcomputer. Two methods are described (dial pulses and dial tones). Hardware & software for a KIM-1 microcomputer are detailed. Three inexpensive hardware/software projects to let you use the cassette port of a TRS-80 Model I or III for a tone generator, telephone dialer, and RS-232C output channel. A computerized telephone dialing system for the TRS-80 Model II computer. Build your own autodialer for making autopatch calls from a v.h.f. mobile rig. Three pushbuttons allow you to dial two stored access codes and one telephone number. Telephone call restrictor blocks access to "900" and "976" numbers or any group of numbers beginning with a certain prefix. The numbers to be blocked are entered into memory from a touch-tone phone. Restrict access to those expensive "900", "540" and "976" telephone numbers with this inexpensive call restrictor. Est. cost: $25. Add an external Touch Tone key pad to your regular dial telephone. Also illustrates how to use the pad with an FM transceiver for autopatch. Build the "Access-Two" tone dialer. Portable touch-tone, telephone dialer provides access to services that require DTMF signals. The TRS-80 dial-a-phone. A simple computer interface that allows your computer to dial a telephone. The interface connects to the relays that operate the cassette recorder on Radio Shack's TRS-80 computer. Interface an Elf 1802-based computer to your telephone to serve as a dedicated dialer. Tele-Pulse, an inexpensive circuit that turns your Heath H8 computer into a sophisticated automatic phone dialer. Includes driver and phone number file routines written in BASIC. Teleguard. Phone accessory automatically calls a preprogrammed telephone number when your burglar/fire alarm or other sensor is tripped. Part 1. Teleguard. Part 2. Conclusion. Teleguard. Part 3. Solid-state sensing modules. Low-cost circuits you build to enhance the operation of the Teleguard security system. Includes light-activated sensors, temperature-sensing module, and fluid-detecting module. Automatic redialer includes a hands-free phone-line monitor (listen only). Telephone memory dialer accessory converts any telephone into a 10-number memory phone. Talking telephone. Vocalizes each number digit as you dial it on a Touch Tone-type keypad. Fone mate. This computerized telephone accessory provides hold, recall, warble-tone ringing, 12- or 24-hour clock display and dialed-digit display function. Area-code speed dialer automatically dials any area code, including the "1", and any digit needed to access an outside line. The unit is customized for a single string of up to 10 digits. Telephone call restrictor. Computerized device prevents outgoing calls to 1-900 and 1-976 toll numbers. Device demonstrates how the dial mechanism works. A computerized automatic telephone dialer. Stores 32 seven-digit phone numbers. Part 1. Hardware. A computerized automatic telephone dialer. Part 2. Writing the program. Build a lock for a cordless telephone that requires the user to key in a 5-digit personal access code before gaining access to the telephone line. Build an emergency telephone dialer. This circuit monitors an open-loop or closed-loop sensor switch. When the sensor is activated, it dials a preprogrammed telephone number and emits an alarm sound. BusyBody. Easy-to-build circuit provides all the convenience of the telephone company's automated redialing system (*66 feature) without incuring extra telephone charges. Phone-A-Larm. A unique device which will raise a telephone receiver and dial a preset number. The phone will be allowed to ring three times and then the connection is broken by replacing the receiver. The same cycle is repeated every 60 seconds. Useful as a burglar alarm using existing telephone lines. Est. cost: $50. Tip: How to remove the dial from a rotary dial type telephone. Pushbutton dialer with memory. Converts a dial phone to a pushbutton phone. Allows the same number to be redialed at the push of a single button. Stores up to 10 phone numbers for automatic dialing. Build autodialer and cassette interface. Pulses recorded on tape will dial a selected phone number and then play a pre-recorded message. Use it as part of a fire alarm or burglar alarm system. Build this interface which will let a TRS-80 computer dial a telephone number. Includes the phone dialer program written in BASIC. TRS-80 automatic telephone dialer interface requires only four diodes, a 9-volt battery and a relay to dial your telephone via a short program and the TRS-80 recorder on/off jack. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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