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- How to Construct a Purple Box.
- ------------------------------
-
-
- The Purple Box is very simple to construct. It takes only six components
- and a PC board if you want. The Purple Box is a telephone hold button. It
- will allow you to switch phones very easily.
-
- A red LED indicates when a party is on hold and is automatically
- extinguished when either party releases the line.
-
- To install your Purple Box, remove the telephone case and locate the red
- and green wires. From the green wire, make a connection to L1 and from the red
- wire a connection to L2.
-
- To test the circuit, call a friend and then while pressing the push
- button, hang up the phone. As soon as the phone is on the hook, you may let go
- of the push button.
-
- Parts:
-
- D1 = Light Emitting Diode (LED)
- D2 = 1N4003 Diode
- R1 = 820 ohm 1/2 Watt
- R2 = 1K ohm 1/2 Watt
- S1 = N.O. Push Button S1
- SCR1 = C106B1 __|__
- +--o o---+----R1----+
- | g| |
- +--------LED--R2---+-------a--+--c--D2---+
- | |
- |L1 SCR----/ |L2
- | |
- To Green To Red
-
-
- The SCR is a three prong IC. The a,g, and c tell you what pins to use. The
- "g" pin is the one on the left if you look at the numbers.
-
- Have Phun,
- The Flash
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- DOWNLOADED FROM P-80 SYSTEMS.....
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-