Ring Tone Generator (UK)

Neon22
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A ringing generator for connecting old (pulse) phones with bells. For UK ring style. Circuit from VK6FH. Amalgam of circuits 1 and 2.
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Tags
phone generator pulse dial ring

Creative Commons Attribution-ShareAlike 3.0 / CC BY-SA 3.0

Published: May 24, 2013 Concept

Project Description

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Project description
A ringing generator for connecting old dial (pulse) phones with bells. This ring tone is for UK ring. Circuit from VK6FH. Amalgam of circuits 1 and 2. http://www.vk6fh.com/vk6fh/ Notes: Should be a 74C90. Regulator should be 5V. Mosfet can be anything over 50V and 10 Amps. Output pin drives a mains transformer in reverse to generate ringing voltage. Connect pin to secondary of tx and other side to ground. Use primary as drive voltage.
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Design Files

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Component (19)
Qty
Description
CD4093BE

U2

1
4093
Diode

D4

1
1N4004
Diode

D6

1
1N4004
2 PIN HEADER

U10

1
2 PIN HEADER ACin

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