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BS-1 

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INTRODUCTION 

Each of us at one time or another has probably heard an endless loop player 
repeating a list of movies playing at the local theatre, or advertising a house for 
sale through your car radio. Sure could be handy around the house 
occasionally, or maybe down at the local flea market. Could you modify a 
cassette or CD player to duplicate this function? Good luck! Where could you 
even find that sort of machine anyway, and how much would it cost? Enter the 
BS1 Bullshooter. 

As a stand alone unit, the BS1 is perfect for the task of, say, announcing 
repetitive instructions at an event: “

All vendors please report to the registration 

desk located at the …“. 

Connected to one of our personal broadcasters like the 

FM-25, the BS1 is ideal for advertising neighborhood garage sales or school or 
church functions. How about a look at the BS1? 

You will notice right away that the Bullshooter isn’t your average tape player. In 
fact, utilizing one of the latest voice recording chips on the market, the BS1 
performs its job without need of a tape. There are no motors, drive belts, or 
gears to wear out. With the exception of the front panel controls, there are no 
moving parts at all! In addition, the endless loop playback feature makes the 
Bullshooter a truly unique device. 

A quick push of the “Record” button sets up the BS1 to record up to a full eight 
minutes of audio. Use the on-board microphone to record a quick message or 
move the pc board mounted jumper to enable use of the line level input for 
recording from other sources; cassette, CD, radio, etc. A “Record” LED serves 
as the record mode indicator and extinguishes when the maximum memory 
capacity has been reached.  

The “Play” button selects playback mode which is automatically set up for 
endless loop operation. The message recorded will continue playback 
indefinitely, looping over and over for as long as the unit remains in play mode.  
Through programming of the internal microcontroller the message will always 
start from the beginning, thus negating the need for rewinding. The “Play” LED 
simply serves as an indicator for playback mode. 

 The Bullshooter features two sets of audio outputs to best suit the application 
at hand. The speaker output (volume controlled by the front panel volume knob) 
has sufficient power to drive most speakers well into normal listening volumes. 
Although being a monaural device, twin line level outputs are provided for 
connection to equipment such as mixers, amplifiers, or transmitters which 
would normally require left and right inputs. 
 

 

Summary of Contents for BS1

Page 1: ...looping playback of any message FOREVER Add a transmitter for error free broadcasting of repetitive announcements This Cape Cod rests on 12 acres with Easy to use pushbutton operation No fumbling aro...

Page 2: ...on Finder Kit HR Series HF All Mode Receivers QRP Series HF CW Transmitters CW700 Micro Memory CW Keyer CPO3 Code Practice Oscillator QRP Power Amplifiers RAMSEY MINI KITS Many other kits are availabl...

Page 3: ...it Description 5 BS1 Parts List 6 Parts Layout Diagram 8 Assembly Procedure 9 Schematic Diagram 10 Initial Testing and Operation 16 Troubleshooting 18 Warranty 19 KIT ASSEMBLY AND INSTRUCTION MANUAL F...

Page 4: ...ving parts at all In addition the endless loop playback feature makes the Bullshooter a truly unique device A quick push of the Record button sets up the BS1 to record up to a full eight minutes of au...

Page 5: ...8kHz sampling frequency provides high quality voice reproduction A four wire serial peripheral interface provides the means of data transfer into and out of the chip If the ISD4004 IC were the heart o...

Page 6: ...R7 R15 1 4 7K ohms yellow violet red R6 7 10K ohms brown black orange R1 R8 R9 R10 R11 R13 one for the bottom of the board 1 15K ohms brown green orange R5 1 1K ohm potentiometer marked 102 R2 1 PC mo...

Page 7: ...CD player Shielded stereo audio cables Speaker Case and Knob Parts Top Cover Bottom Base Tray 4 Short Phillips Head Screws 2 Long Phillips Screws Front and Rear Plastic Panels Front and Rear Labels 4...

Page 8: ...BS 1 8 BS1 PARTS LAYOUT DIAGRAM...

Page 9: ...it perhaps our explanations will help you understand and learn as we go along The assembly sequence will complete operational blocks as faithfully as is practical as part of Ramsey s Learn As You Buil...

Page 10: ...BS 1 10...

Page 11: ...BS 1 11...

Page 12: ...here An old trick is to wipe the hot tip of the iron across a damp sponge before soldering each connection This keeps the tip clean and spreads the heat faster for a solid connection If you haven t t...

Page 13: ...vents any higher frequency noise byproducts from U2 and U4 working from being passed on to the audio outputs 18 Install C7 10 F electrolytic capacitor Be sure to orient for proper polarity 19 Install...

Page 14: ...tic capacitor Orientation 39 Install VR1 5 volt regulator 3 legged device marked 7805 Make sure the metal tab is oriented as shown in the parts layout The text side of the component should be facing S...

Page 15: ...the two leads is the anode or connection Most diodes also have a flat molded in the component body This corresponds to the cathode or side of the part When the pc board is installed into the case the...

Page 16: ...Double check all pins to make sure none are bent under A little time spent here can save a lot of grief later 63 You should still have one 10K ohm resistor left This is to be soldered on the bottom s...

Page 17: ...position as seen from looking over the front panel DO NOT CONNECT SPEAKER LEVEL OUTPUTS TO THE BS1 INPUTS OR DAMAGE TO U2 COULD RESULT 3 Push the Record button on the BS1 The Record LED will illuminat...

Page 18: ...s work but nothing else happens 1 Make sure U2 is properly seated 2 Check for 2 volts DC on U2 pins 18 27 U2 runs off a separate power source through diodes D1 D2 and D3 Misc faults or problems 1 Chec...

Page 19: ...be assured that the 1K ohm resistors are actually the missing 10 K parts Hum m m I guess the red band really does look orange Ramsey Electronics project kits are packed with pride in the USA If you b...

Page 20: ...ers MPP4 or RTS05 Small Diagonal Cutters RTS04 ADDITIONAL SUGGESTED ITEMS Helping Hands Holder for PC Board Parts HH3 Technician s Tool Kit TK405 Desoldering Braid RTS08 Endless Loop Voice Recorder Ki...

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