==Phrack Inc.== Volume Three, Issue 28, File #5 of 12 /////////////////////\\\\\\\\\\\\\\\\\\\\\ || || || A Real Functioning PEARL BOX Schematic || || || || Written, Tested, and Used || || || || by Dispater || || || || July 1, 1989 || || || \\\\\\\\\\\\\\\\\\\\\///////////////////// Introduction: After reading the earlier renditions of schematics for the Pearl Box, I decided that there was an easier and cheaper way of doing the same thing with an IC and parts you probably have just laying around the house. What Is A Pearl Box and Why Do I Want One? A Pearl Box is a tone generating device that is used to make a wide range of single tones. Therefore, it would be very easy to modify this basic design to make a Blue Box by making 2 Pearl Boxes and joining them together in some fashion. A Pearl Box can be used to create any tone you wish that other boxes may not. It also has a tone sweep option that can be used for numerous things like detecting different types of phone tapping devices. Parts List: CD4049 RCA integrated circuit .1 uF disk capacitor 1 uF 16V electrolitic capacitor 1K resistor 10M resistor 1meg pot 1N914 diode Some SPST momentary push-button switches 1 SPDT toggle switch 9 Volt battery & clip and miscellaneous stuff you should have laying around the house. State-of-the-Art-Text Schematic: + 16V 1uF - _______________________________||_____ | ! ! || | _ | _______________________ |__________| |/| 8ohms ____|__|_____:__|__:__|_ | __________| | | | 9 10 11 12 13 14 15 16 | | | |_|\| | CD4049UBE | | | |_1__2__3__4__5__6__7__8_| : | _ | | |__| |__| | |____________________|_________[-] | | ! ! : [b] | |__________________________| [a] | : : | [t] | ! 1N914 ! ! [t] |___________|/|_____________________________________[+] : |\| : : | | | | 10M | | |___/\/\/\__| | | | | |_____||____| | <-- These 2 wires to the center pole || | | of switch. .1uF 50V | | | | _______________________| |_____________________________ | ___[Toggle Switch]____________ | | | | ___ | | | | o o | | | | /\/\/\___| |__| |_/\/\/\____/\/\/\ | | ^ | 1K ^ | |____| ___ | |___| | o o | | /\/\/\___| |__| (pot side) (push-button | ^ side) |__| Explanation: The 2 wires that lead from the main part of the circuit should be connected to the center poles on the toggle switch. Put the 2 wires to the pot on one side and the 2 wires going to the push-buttons to the other side. That way you can switch between tone sweep and the favorite tones you like (the push-button side). To keep tones that you want to use frequently like 1850 Hz then all you have to do is put in a variable resistor and adjust it to where you have the correct tone, then just put a push-button switch on the line. You can link them together in a chain, etc. There are many other good modifications to make to the box so have fun and be smart. --Dispater \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\?///////////////////////////////////////