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Ni-CD battery charger
Batteries charge current is fixed, about 1/10 of battery capacity /as example, NiCd battery with capacity 900 mAh should be charged for 14 hours with 90 mA/. Input voltage varies on the number of batteries charged /connected in
58.06 KB
HOBBY KIT
1050
4
pc
| 1+ | 2.70 BGN |
| 3+ | 2.44 BGN |
| 5+ | 2.22 BGN |
| 10+ | 2.04 BGN |
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SIRIUS PCB
4302
0
pc
| 1+ | 3.60 BGN |
| 3+ | 3.42 BGN |
| 5+ | 3.26 BGN |
| 10+ | 3.13 BGN |
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Microphone preamplifier
Transistor preamplifier with an electret microphone, connected at the input. Power supply:
60.16 KB
HOBBY KIT
1035
3
pc
| 1+ | 3.90 BGN |
| 3+ | 3.54 BGN |
| 5+ | 3.24 BGN |
| 10+ | 2.98 BGN |
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Protection circuit for audio amplifie
Universal protection device for audio amplifiers: - delays about 5 seconds switching speakers on when power supply is turned on - switches speakers off immediately - switches speakers off if end power amplifier gets out of order Power supply:
71.68 KB
HOBBY KIT
1013
5
pc
| 1+ | 4.00 BGN |
| 3+ | 3.66 BGN |
| 5+ | 3.37 BGN |
| 10+ | 3.12 BGN |
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Uni-polar to bipolar voltage converter
Uni-polar to bipolar voltage converter. At input voltage of 24V, the output voltage is 12V. Converter can be used for kits 1028 and
59.38 KB
HOBBY KIT
1032
3
pc
| 1+ | 4.00 BGN |
| 3+ | 3.66 BGN |
| 5+ | 3.37 BGN |
| 10+ | 3.12 BGN |
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Microphone preamplifier
Transistor preamplifier with electret microphone in the input. Power supply: 3~12V Output:
60.16 KB
HOBBY KIT
1535
3
pc
| 1+ | 4.20 BGN |
| 3+ | 3.84 BGN |
| 5+ | 3.54 BGN |
| 10+ | 3.28 BGN |
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385.87 KB
SIRIUS PCB
11010080
15
pc
| 1+ | 4.60 BGN |
| 3+ | 4.27 BGN |
| 5+ | 3.99 BGN |
| 10+ | 3.75 BGN |
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Emergency siren
This device is based on discrete components in three parts: clock-pulse generator, audio frequency generator and power amplifier. Power supply: 9-12V Speaker: 4-8
70.96 KB
HOBBY KIT
1017
8
pc
| 1+ | 4.70 BGN |
| 3+ | 4.30 BGN |
| 5+ | 3.96 BGN |
| 10+ | 3.67 BGN |
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US police siren
Device with discrete components in three parts: clock-pulse generator, audio frequency generator and power amplifier. Power supply: 9-12V Speaker: 4-8
70.59 KB
HOBBY KIT
1018
6
pc
| 1+ | 4.70 BGN |
| 3+ | 4.30 BGN |
| 5+ | 3.96 BGN |
| 10+ | 3.67 BGN |
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Italian police siren
Device with components in three parts: clock-pulse generator, audio frequency generator and power amplifier. Power supply: 9-12V Speaker: 4-8
74.23 KB
HOBBY KIT
1019
> 10
pc
| 1+ | 4.70 BGN |
| 3+ | 4.30 BGN |
| 5+ | 3.96 BGN |
| 10+ | 3.67 BGN |
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60.76 KB
HOBBY KIT
1027
2
pc
| 1+ | 4.70 BGN |
| 3+ | 4.30 BGN |
| 5+ | 3.97 BGN |
| 10+ | 3.68 BGN |
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Power supply +/-12V/100mA
Power supply based on rectifier, filter and parametric regulator. Input Voltage: 2x12V It has been designed for devices with consumption less than 100mA and bipolar supply voltage /kits with catalogue numbers 1028 and
58.48 KB
HOBBY KIT
1033
5
pc
| 1+ | 4.80 BGN |
| 3+ | 4.38 BGN |
| 5+ | 4.03 BGN |
| 10+ | 3.73 BGN |
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Car alarm system
Device based on CMOS technology. For 4 doors car. Output time: approx. 15 seconds Input time: approx. 15 seconds /doors only/ Alarm signal time: approx. 70 seconds In case of opening any door - alarm signal goes "on"
62.2 KB
HOBBY KIT
1005
3
pc
| 1+ | 5.00 BGN |
| 3+ | 4.56 BGN |
| 5+ | 4.19 BGN |
| 10+ | 3.88 BGN |
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49.22 KB
HOBBY KIT
1009
3
pc
| 1+ | 5.00 BGN |
| 3+ | 4.58 BGN |
| 5+ | 4.22 BGN |
| 10+ | 3.92 BGN |
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5-channel sound regulator (Equalizer)
Multi-channel sound regulator close to professional but much more cheaper. Power supply:
72.78 KB
HOBBY KIT
1026
4
pc
| 1+ | 5.20 BGN |
| 3+ | 4.78 BGN |
| 5+ | 4.43 BGN |
| 10+ | 4.13 BGN |
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Electronic melody door bell
Device based on LM555 - 2 frequency generator. The first tone when the button is push-on, the second- when released. Power supply: 9V Speaker: 4-8
71.63 KB
HOBBY KIT
1034
5
pc
| 1+ | 5.30 BGN |
| 3+ | 4.86 BGN |
| 5+ | 4.49 BGN |
| 10+ | 4.18 BGN |
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Stereo audio amplifier PAM8403, Class D 2x3W
Applications: -amplifier for televisions -home cinema -any kind of audio systems -MP3/MP4 players -replacement of the final stages of different devices Advantages: -high efficiency (efficiency ratio) -current protection -low supply voltage protection - Typ. 2.5 -ideal for powering a 3.6V Li-Ion battery -very small non-linear distortion from 20Hz to 30kHz -very low current in standby mode -is not affected by large ripples in the supply voltage -very little heat released Attention: 1. The direction of the supply voltage should not be confused, and it should not exceed 6V even for a short time. 2. It is recommended that the audio input cables are shielded. 3. The output stage of the circuit is full bridge (BTL). The output negatives cannot be connected at one point, otherwise you risk burning the integrated circuit. MAIN PARAMETERS: ·Work class CLASS D (CLASS D) ·Operating voltage: DC 2.5 V to 6 V Rated output power: 2x3W (2x4ohm) ·Frequency Band: 20Hz~30kHz ·Efficiency (Efficiency): over 90% at maximum power ·Dimensions: 21 x 18
131.62 KB
SIRIUS PCB
11020011
5
pc
| 1+ | 5.60 BGN |
| 3+ | 5.19 BGN |
| 5+ | 4.85 BGN |
| 10+ | 4.56 BGN |
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Four circuits for timing relays
Timing project is for timing delays up to 30 seconds. The difference between 4 modes is in timing
HOBBY KIT
1040
5
pc
| 1+ | 5.70 BGN |
| 3+ | 5.20 BGN |
| 5+ | 4.81 BGN |
| 10+ | 4.47 BGN |
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67.9 KB
HOBBY KIT
1007
3
pc
| 1+ | 5.90 BGN |
| 3+ | 5.40 BGN |
| 5+ | 5.00 BGN |
| 10+ | 4.67 BGN |
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61.98 KB
HOBBY KIT
9918W
1
pc
| 1+ | 6.20 BGN |
| 3+ | 5.70 BGN |
| 5+ | 5.25 BGN |
| 10+ | 4.89 BGN |
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61.98 KB
HOBBY KIT
9918R
1
pc
| 1+ | 6.20 BGN |
| 3+ | 5.70 BGN |
| 5+ | 5.25 BGN |
| 10+ | 4.89 BGN |
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61.98 KB
HOBBY KIT
9918B
1
pc
| 1+ | 6.20 BGN |
| 3+ | 5.70 BGN |
| 5+ | 5.25 BGN |
| 10+ | 4.89 BGN |
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Audio amplifier 1W (LM386)
Max. output: 1 W Power supply: 5~14 VDC Consumption at idle: 4 mA Distortion: 0.2% Gain:
HOBBY KIT
1571
3
pc
| 1+ | 6.30 BGN |
| 3+ | 5.75 BGN |
| 5+ | 5.30 BGN |
| 10+ | 4.92 BGN |
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SIRIUS PCB
11020017
13
pc
| 1+ | 6.40 BGN |
| 3+ | 6.05 BGN |
| 5+ | 5.75 BGN |
| 10+ | 5.50 BGN |
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Home alarm system with siren
Alarm system based on CMOS technology. Push button or a magnet and REED switch can be used as
69.88 KB
HOBBY KIT
1006
3
pc
| 1+ | 6.60 BGN |
| 3+ | 6.10 BGN |
| 5+ | 5.65 BGN |
| 10+ | 5.30 BGN |
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0700 18 880
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