LED Strobe Light Ramsey Electronics Model No. LEDS1 Super-Bright LEDs pulse to your music. Switch over to stroboscope mode for a super-blue hypnotic flash! Use the LEDs as a super flashlight. The possibilities are endless! • Bright blue stroboscope without high voltage or glass tubes. • Adjustable flash rate. • Audio mode flashes to your stereo. • Runs on 12V DC. • LEDs won’t burn out. • External trig allows for expandability. • 3 different LED boards to choose from.
PARTIAL LIST OF AVAILABLE KITS: RAMSEY TRANSMITTER KITS • FM10A, FM25B FM Stereo Transmitters • AM1, AM25 Transmitter RAMSEY RECEIVER KITS • FR1 FM Broadcast Receiver • AR1 Aircraft Band Receiver • SR2 Shortwave Receiver • AA7 Active Antenna • SC1 Shortwave Converter RAMSEY HOBBY KITS • SG7 Personal Speed Radar • SS70A Speech Scrambler/Descrambler • TT1 Telephone Recorder • SP1 Speakerphone • MD3 Microwave Motion Detector • PH14 Peak hold Meter • AVS10 Automatic Sequential Video Switcher • WCT20 Cable Wizar
Ramsey Publication No. LEDS1 Manual Price Only $5.00 KIT ASSEMBLY AND INSTRUCTION MANUAL FOR LED Strobe Light TABLE OF CONTENTS Introduction ........................................................ 4 LEDS1 Circuit Description ................................. 4 “Learn-As-You-Build” Kit Assembly ....................6 Parts List............................................................ 7 Assembly Steps ..................................................9 Setup and Testing .................................
WARNING: According to the Epilepsy Foundation it is possible that this kit may present a risk to those with this affliction. Affected individuals must be aware of the possible triggering of seizures by certain visual stimuli. INTRODUCTION Everyone has seen a strobe light at one time or another. The bright eye-popping lights are real attention-getters. They typically use Xenon bulbs which require high-voltage.
components. The user selects which filter the audio passes through by pushing switch S1. After being filtered the audio signal arrives at U1:B where it is amplified slightly by a factor of 22. After this, the amplified audio goes to U2, an NE555 timer, that is configured as a retriggerable monostable multivibrator. The circuit produces an output pulse every time the audio signal gets above its threshold level. For example, consider a piece of music that has a drum beat.
RAMSEY Learn-As-You-Build KIT ASSEMBLY There are numerous solder connections on the LEDS1 printed circuit board. Therefore, PLEASE take us seriously when we say that good soldering is essential to the proper operation of your kit. • • • • Use a 25-watt soldering pencil with a clean, sharp tip. Use only rosin-core solder intended for electronics use. Use bright lighting, a magnifying lamp or bench-style magnifier may be helpful. Do your work in stages, taking breaks to check your work.
LEDS1 MAIN BOARD PARTS LIST The main board is the larger of the two. Sort and “check off” the components in the boxes provided. We do our best to pack all our kits correctly but it is possible that a mistake has occurred and we missed a part. Please note that physical descriptions of parts are for those currently being shipped. Sometimes the parts in your kit may have a different appearance but still have the same values.
1 1 1 3 1 24AWG wire, red/black, 7 inches 3.5mm stereo jack (J3) RCA jack (J1) pushbutton switches (S1,S2,S3) double sticky foam tape 4 inches LEDS1 LED BOARD PARTS LIST The LED board is the smaller of the two. RESISTORS 4 1 68 ohm resistor [blue-gray-black] (R31,R32,R33,R34) 150 ohm resistor [brown-green-brown] (R35) SEMICONDUCTORS 9 Vishay Telux™ LEDs (D28,D33,D35,D36,D37,D38,D39,D40,D41) MISCELLANEOUS 1 2.
LEDS1 PC BOARD ASSEMBLY STEPS 1. Let’s begin with all the jacks at the bottom of the board. Install J2, the power jack in the lower right hand corner. 2. Install R6, 1K ohm resistor [brown-black-red], under R5. 3. Install J5, another power jack next to J2. This is the jack that connects to the LED board. 4. Now, let’s start soldering in some real components. Start with R17, 100K ohm resistor [brown-black-yellow] in between J5 and J2. This is the audio input jack. 5. Install RCA jack, J1. 6.
23. Install C9, .47 uF electrolytic capacitor under VR1. Watch the polarity. Make sure the band on the cap lines up with the right hole on the board. Only “+” is marked on the board, the band on the cap could be “+” or “-”. 24. Install R5, 1K ohm resistor [brown-black-red], next to C9. 25. Install C11, 1 uF electrolytic capacitor, next to R5. Watch polarity. 26. Install C12, 10 uF electrolytic capacitor just above C11. Watch polarity again. 27. Install U3, NE555 timer IC, to the left of C12.
board. Put Q1 in its three holes, then bend it back so that it lays flat on the board. Make sure that no metal on Q1 touches the ground plane of the circuit board, only the rectangle directly behind it that acts as its heatsink. 42. Install R8, 1K ohm resistor [brown-black-red], to the right of Q1. 43. Install D12, 1N270, germanium diode under Q1. Line up the cathode band again. 44. Install C2, .1 uF capacitor [marked 104], under D12. 45. Install C1, .1 uF capacitor [marked 104], next to C1. 46.
49. Install R31, R32, R33, and R34, 68 ohm resistors [blue-gray-black]. 50. Install the 2.1mm power jack (J6). 51. You now need to solder up the cable that connects the LED board to the main board. Strip the ends off of the twisted red and back wire. Unscrew the caps from the power plugs and slide them onto the wire. Now solder the red wires onto the center pins and the black wires onto the side pins. Screw the end caps back on.
flash to the beat if you are playing a song that has a good drum beat. If there is a lot of electric guitar you will probably see multiple flashes with each guitar hit because an electric guitar will tend to produce a more continuous string of low frequencies as opposed to the quick “thump” of a drum. On the high-pass setting the LEDS1 will tend to trigger on things like a symbol hit or snare drum beat. Instruments like these tend to produce a lot of high frequencies.
MORE LEDS! If 9 LEDs isn’t enough you can purchase a 20 LED array, the LEDS1-LG, from Ramsey Electronics. This plugs into your kit the same way as the 9 LED board. We also sell an LED stick that works a little differently. It uses a 3.5mm stereo phono jack instead of a power plug type jack. The stereo jack plugs into jack J3 on the LEDS1 main board. To do this you need to solder up a cable like you did earlier for the 9 LED board that came with the LEDS1.
2 LEDS1s CHAINED TOGETHER For even more flashing power you can buy 2 LEDS1s and make them flash at the same time either in audio or stroboscope mode. The two kits are connected via the external trigger jack. Connect them with the same double ended 3.5mm cable described above. One LEDS1 is the “master” that drives the other LEDS1, or the “slave”. Set the master to stroboscope or audio mode and the slave to audio mode. The slave will now flash synchronously with the master.
LEDS1 MAIN BOARD PARTS LAYOUT DIAGRAM LEDS1• 16
LEDS1• 17
LEDS1-SM 9 LED BOARD LAYOUT LEDS1• 18
LEDS1• 19
LEDS1• 20
LEDS1• 21
LEDS1• 22
The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting the factory. Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! All Ramsey kits will work if assembled properly. The very fact that your kit includes this new manual is your assurance that a team of knowledgeable people have field-tested several "copies" of this kit straight from the Ramsey Inventory.
LEDS1 LED STROBE LIGHT Quick Reference Page Guide Introduction to the LEDS1 ................................. 4 LEDS1 Circuit Description ................................ 4 Parts List ........................................................... 7 Parts Layout Diagrams ............................... 12,14 Schematic Diagram..................................... 13,15 Troubleshooting Guide ..................................... 17 Ramsey Kit Warranty .......................................
