Published:2011/4/27 3:49:00 Author:Rebekka | Keyword: positive and negative voltage , single-supply
Using TDA as positive and negative voltage single-supply circuit diagram is shown as above. (View)
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Published:2011/4/27 3:49:00 Author:Nicole | Keyword: TOYOTA COASTER, coach, electronic control, electronic speed variator
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Published:2011/4/27 3:47:00 Author:Ecco | Keyword: 555 , Negative, voltage source
As shown in Figure 9-1, 555 and R1, R2, C3 form an astable multivibrator, f = 1.44 / (R1 +2 R2) C3, the frequency of the icon parameter is about 80kHz. R2 is greater than the R1, so the duty cycle closes to 50%. The output oscillation pulses is rectified by the D1, D2, C2, and it gets a negative voltage and offers tens of mA load current.
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Published:2011/4/27 3:46:00 Author:Rebekka | Keyword: single-chip radio circuit
Using TDA7052 as single-chip radio circuit diagram is shown as above. (View)
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Published:2011/4/27 3:45:00 Author:Nicole | Keyword: TOYOTA COASTER, coach, wiper, window washing device
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Published:2011/4/27 3:41:00 Author:Ecco | Keyword: 555, voltage detection
As shown in Figure 7-10, the voltage detection circuit uses 555 as the core to form in bistable mode. Usually, the pin 6 of 555 (threshold level side)is connected to VDD by R1, therefore, pin 3 is in low level. The pin 2 on trigger end of 555 is connected to the measured point by a regulator DW, DW regulator is Vz, when the measured voltage is less than Vz +1/3 VDD, the 555 sets, pin 3 is high level, LED is lit. If using different value of regulators DW, it is controlled by the switch, you can distinguish the different values of the measured voltage.
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Published:2011/4/27 3:44:00 Author:Rebekka | Keyword: DC power supply circuit
Using TDA2030 as DC power supply circuit diagram is shown as above. (View)
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Published:2011/4/27 3:43:00 Author:Rebekka | Keyword: wired interphone
Using TA7641 as wired interphone circuit diagram is shown as above. (View)
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Published:2011/4/27 2:13:00 Author:Rebekka | Keyword: Wireless transmitter module
Communication: AM ASK Frequency: 315MHZ ~ 433.92MHZ Quiescent Current: ≤ 0.1UA Emission current: +10 mA Operating Voltage: DC 1.8 ~ 3.6V Operating Temperature: -24 ℃ ~ +85 ℃ Dimension: 16.5x11.2x5. 5MM Frequency Stability: ± 30KHZ Transmit power: 10dbm Launch distance: 500m (empty extension) Modulation rate: 3KB / S (View)
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Published:2011/4/27 3:32:00 Author:Rebekka | Keyword: multi-purpose radio
Using LM386 as multi-purpose radio circuit diagram is shown as above. (View)
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Published:2011/4/27 3:41:00 Author:Nicole | Keyword: TOYOTA COASTER, coach, automatic door
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Published:2011/4/27 3:33:00 Author:Rebekka | Keyword: aquare-wave generator
Using LM386 as aquare-wave generator circuit diagram is shown as above. (View)
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Published:2011/4/27 3:35:00 Author:Rebekka | Keyword: audio frequency oscillator
Using LM386 as audio frequency oscillator circuit diagram is shown as above. (View)
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Published:2011/4/27 3:39:00 Author:Rebekka | Keyword: LED flash launcher
Using TA7641 as LED flash launcher circuit diagram is shown as above. (View)
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Published:2011/4/27 3:36:00 Author:Rebekka | Keyword: speaker tester
Using LM386 as speaker tester circuit diagram is shown as above. (View)
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Published:2011/4/27 3:38:00 Author:Nicole | Keyword: TOYOTA COASTER, coach, connector, body cluster
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Published:2011/4/27 3:37:00 Author:Rebekka | Keyword: gas leak detector
Using SL as gas leak detector circuit diagram is shown as above. (View)
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Published:2011/4/27 3:36:00 Author:Nicole | Keyword: TOYOTA COASTER, coach, connector, instrument cluster
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Published:2011/4/27 3:32:00 Author:Ecco | Keyword: 555 , quickly , resistance, measuring
As shown in Figure 7-8, measuring circuit uses 555 as the core, and 555,R1, R2, R3, Rx, C1 form an astable multivibrator.
Changing the switch K can change the oscillation frequency. Since R4 ~ R9 resistor (10Ω ~ 1MΩ) is known, Rx is the resistance under test,it caneasily and quickly determine the resistance of Rx by the comparison of the sound with correspondingoscillation frequency of known resistors.
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Published:2011/4/27 3:18:00 Author:Rebekka | Keyword: USB Dual 2.5W multimedia power
USB Dual 2.5W multimedia power amplifier circuit diagram is shown as above. (View)
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