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"DOBRI COMMERCE" Ltd.

"Electronic components" Store

Phones: +359-92-661997, +359-878 661997

+359-888-560011

3000 Vratza, P.O. Box 206, Bulgaria

ICQ 340459556

Orders: dobrikit@dir.bg

 

Computer and LAN Surge Protectors

"LIGHT TUNING" FOR A CAR

     
     

2х50Watts с EL34

GSM Communicator GCM1000

     
   
 
GALERY DISTRIBUTORS METALDETECTORS HOBBY LINKS
         

Built and tested

     
redballA121 Capacitors Set 1 - 60 pcs. ceramic capacitors 5 pF - 100 pF
redball A122 Capacitors Set 2 - 60 pcs. ceramic capacitors 100 pF - 1000 pF
redballA123 Capacitors Set 1 - 60 pcs. ceramic capacitors 1000 pF - 33,000 pF
redball B201 "Sound Generator" - Built and tested generator of 1200 Hz - 0,3W - 8 Ohms
redball B202 "Flasher" - Built and tested flashing LED 5 - 24V
redball B203 "Two-colored Flasher" - Built and tested flashing LED with red and green color in sequence
redball B204 "10 Running Lights" - Built and tested 10 moving lights with IC4017 with transistorized outputs and allowing connecting 200 LEDs
redball B205 "Double Flasher" Built and tested 2 flashing LEDs, one after another
redball B206 "Timer Relay-1" - Built and tested timer from 2 to 180 sec. With relay output 1A/ 220V - power supply 10-12V
redballB207 "Timer Relay-2" - Built and tested timer from 10 min. to 30 sec power supply 12V .
redball B211 " Accumulator Battery Indicator 1" - Built and tested indicator. Informs about the state of a car accumulator battery 12V with three LEDs
redballB212 " Accumulator Battery Indicator 2" - Built and tested indicator. Informs about the state of a car accumulator battery and might be used as a voltage meter.
redball B222 "Stereo Indicator-1" - Built and tested stereo indicator with 2x5 rectangular LEDs with KA2281 and a panel
redball B223 "Stereo Indicator-2" -Built and tested stereo indicator with 5 round LEDs with KA2281 and a panel
redballB225 "Stereo Indicator-3" - Built and tested stereo indicator with 2x5 LEDs situated in "V" with KA2281
redballB231
 
"Blinking Blue LED" - Built and tested blinking blue LED, current consumption 5 mA and power supply voltage from 12 to 15 V
redballB301 "Rectifying Circuit 1" - Built and tested rectifying circuit with an input of max. 25 V DC and an output from 1.5 to 35 V/ 6A. Contains 4 pieces of 1N5408 diodes and a 2000 uF/ 35 V capacitor. The device is suitable as a power supply of AF amplifier 2x20 W/ 2x22 W/ 2x40W and also as LAN power supply (kit C372)
redball B311 "Stabilized Rectifier " - Regulated and stabilized rectifier 2 - 25 V with MAA723 and 2T7235
redball B315 "Stabilizer 5 -32V/ 1A" -5 -32V/ 1A - Built and tested stabilizer board with 7805 5 - 32 V - 1 A
redball B321 "Regulator 1" - Built and tested phase regulator using triac KT207 220 V 500 W
redball B322 "Regulator 2" - Built and tested phase regulator using triac KT774 220 V 1000 W
redball B323 "Regulator 3" - Built and tested phase regulator using triac KT784 220 V 1300 W
redballB324 "Regulator-4" - Built and tested phase regulator using triac KT728 220 V 3000 W
redball-B325 "Regulator-5" - Built and tested phase regulator using triac BTA12 220 V 2500 W
redballB331 "Regulated Rectifier 1.5 - 35 V/ 1.5 A " - Built and tested with LM317T and 4 pieces of 1N4007 diodes, smooth control of the output voltage with a trimmer-potentiometer
redballB332 "Regulated Rectifier 3 V/ 4,5 V/ 7,5 V/ 9 V - 1.5 A" - Built and tested with LM317T and 4 pieces of 1N4007 diodes, four fixed voltages, suitable for powering of a diskman, walkman, pocket radio cassette player.
redballB333 "Regulated Rectifier 1.5 - 35 V/ 3 A " - Built and tested with two LM317T and 4 pieces of 1N5408 diodesan
redballB351
" Regulated Rectifier 1.2 - 35 V/ 3 A" - Built and tested with LM2576T with potentiometer- ADJ with 4 pieces of 1N5408
redball B221 "Power Indicator" - Built and tested. Power indicator for a speaker with 7 LEDS, 8 transistor and no extra power supply.
redball B503 "Stereo Preamplifier-1 " - Built and tested stereo preamplifier with LA3161 (KA2221)
redballB504 "Mono Preamplifier-2" Built and tested mono preamplifier
redball B505 "Graphic 5-channel Stereo Equalizer 1" - Built and tested stereo equalizer with two KA2223
redball B507 "Graphic 5-channel Stereo Equalizer 2" - Built and tested stereo equalizer with two LA3600
redball B521 "A.F. Amplifier 5 W" - Built and tested AF amplifier with MBA810
redball B523 "A.F. Amplifier 10 W" - Built and tested AF amplifier with TDA2003
redball B531 " A.F. Amplifier 2x10 W " - Built and tested AF amplifier with TDA2005
redball B543 " A.F. Amplifier 2x20W" - Built and tested AF amplifier with TDA1554 (1555)
redball B555 "A.F. Amplifier 2x22W" - Built and tested AF amplifier with TA8210
redballB566 " A.F. Amplifier 2Х40W" - Built and tested AF amplifier with TDA8560Q
redballB575 "A.F. Amplifier 100 W" - Built and tested AF amplifier with TDA7294 with high quality electrolytic capacitors
redball B601 "Three-voice siren " -Built and tested transistor siren
redball B606 " Piezosiren 110db" - Built and tested power two-tone siren for piezospeaker for voltage from 4 to 12 V, current consumption at 9 V is 6 mA, and at 12 V - 8 mA
redball B611 "Alarm" - Built and tested
redball B704 "FM предавател 1" - Built and tested radio microphone with a battery connector
redball B707 "Mini FM Transmitte-1" - Built and tested (very small, size 9/25 mm) with 9V battery connectorV
redball B710 "FM Transmitter 2" - Built and tested radio microphone with a battery connector
redballB724 " Preamplifier with a microphone " - Built and tested preamplifier with an electrets microphone. Could be used as an "electronic ear", mobile microphone, etc.
redballB807 "Term regulator 3" - Built and tested for an incubator, output with a relay and a power supply of 12 V
redballB833 "Inverter 220 V - 1" Built and tested inverter 220 V for a luminescent lamp up to 40 W
redballB835 "Inverter 220 V - 2" Built and tested inverter 220 V for a luminescent lamp up to 40 W
redballB904 " 100 Running Lights" - Built and tested
redballB909 "Christmas Tree" - Built and tested Christmas tree with 23 LEDs, 2 ICs, and 9 V battery connector
redballB950 "Frequency Meter" - Built and tested frequency meter up to 50 MHz
redballB951 "Digital Scale" - Built and tested frequency meter - digital scale for a transceiver or broadcast radio receiver
redballB981 "EEPROM Programmer - 1" - Built and tested EEPROM programmer: 24C00,01,02,04,08,16,32,64,128,256,512: 25010,20,40,80,128,160,256,320,520,640:2913,14,19,22,29,34: 33C80,101,104,116,204,704: 35C80,102,108,116,204: 59C11,13,22: 6420: 7005,7: 85C72,82,92: 93C08,13,14,45,46,46X,56,56X,66,66X,67,86: NVM3060: P2100R: PDG011: CXK1011,12,13: SDA2506,16,26,46,86: S24H30,45: S24S45: TC89101,102: X24C00,44
redballC1001 "Metal Detector "BRUTUS" - Built and tested fully functional metal detector from the middle class. Metal detector for small objects, such as coins.
redballC1103 Stabilized Adapter 3 V/ 0.4 A - Built and tested stabilized adapter (kit B332) in a box. Output voltage 3 V/ 400 mA. Suitable for powering walkmans, radio receivers and other similar devices with this voltage and current
redballC1104 Stabilized Adapter 4.5 V/ 0.6 A - Built and tested stabilized adapter (kit B332) in a box. Output voltage 4.5 V/ 600 mA. Suitable for powering diskmans, radio receivers and other similar devices with this voltage and current
redballC1109 Stabilized Adapter 9 V/ 0.4 A - Built and tested stabilized adapter (kit B332) in a box. Output voltage 9 V/ 400 mA. Suitable for powering radio phones, radio receivers and other similar devices with this voltage and current
redball C323 "Regulator 3" - Built and tested regulator 0 - 220 V 1300 W in a adapter box
redballC371 "Power Supply for LANs 60 V " - Built and tested power supply in a box for LAN terminals. Max input voltage is 60 V DC. Output voltage is from 5 to 15 V DC. Built with LM2575HVT
redballC372 "Power Supply for LANs 40 V " - Built and tested power supply in a box for LAN terminals. Max input voltage is 40 V DC. Output voltage is from 5 to 15 V DC. Built with LM2575T
redballC391
"Current Rectifier 1" - Built and tested stabilized current rectifier in a metal box 13.6V/ 2A
redballC392
"Current Rectifier 2"  
- Built and tested stabilized current rectifier in a metal box 13.6V/ 3A
redball C606 "Piezosiren 110db" - Built and tested with 60 W piezospeaker
redball C611 "Alarm" - Built and tested in a box
redball C740 "Stationary VHF Antenna with Amplifier " - High efficiency antenna in 88-108 MHz band with vertical polarization /with additional power supply/ 25db
redball C741 " Car Antenna Amplifier 88 - 108 MHz" - Built and tested in a box and with connectors for car cassette player 20 dB
redball C743 " Car Cassette Player Filter" - Built and tested in a box
redball C766 "Test Device for Remote Control Units" - Universal test device for remote control units in a box and with sound and light signal, power supply - from 9V battery
redballC813 "Dark - Light Relay" - Built and tested in a box photo relay for an automatic turning on of the lights at getting dark. The power supply voltage is 200 V, and the relay output is for 1 А.
redballC901 " Blitz - 1" - Built and tested in a box Blitz effect with a xenon lamp and a power supply of 12V/ 300 mA
redballC903 " Blitz - 2" - Built and tested in a box Blitz effect with two xenon lamps and a power supply of 12V/ 300 mA
redballC971 "Morse Key " - Built and tested Morse key based on PIC microcontroller and 4 memories
     

 

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