Published:2011/4/18 6:13:00 Author:Rebekka | Keyword: Four channels, interlock control
Four-channel remote control transmitter interlock circuit diagram.
Four-channel remote control receiver interlock circuit diagram. (View)
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Published:2011/4/18 6:06:00 Author:Rebekka | Keyword: Anti-jamming , radar anti-theft alarm
Anti-jamming radar anti-theft alarm uses secondary power supply, signal processing circuit. It uses pulse recognition network to suppress the power supply voltage fluctuation, suppress the clutter and other interference factors with a high reliability. (View)
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Published:2011/4/18 4:54:00 Author:Rebekka | Keyword: Multi-function remote control,
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Published:2011/4/19 1:44:00 Author:Ecco | Keyword: Multi-output , crystal, oscillator
The chart shows the multi-output crystal oscillator. It is mainly composed of three gates of A1, four resistors, two capacitors and a crystal. Rl ~ R4 bias two inverters in the linear range, and they are connected between the pin 4 and pin1 of A1 by the crystal SJT, and they are used to provide feedback loop. It only produces frequency on the fundamental frequency of crystal. The selection of components: capacitor Cl is 15p (vernier capacitor). Resistors Rl, R3 are 220Ω, R2 is 560Ω, R4 is 1.8kΩ, R5 is 1kΩ, the nominal power is l/8W. IC Al is 7404, A2 is the 74LS74, A3 is the 74LS393. Crystal SJT is SW60A-4096kHz. Switch SA is KNX (1 × 3).
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Published:2011/4/19 1:33:00 Author:Ecco | Keyword: Square wave, sine wave, generator
The chart shows the square wave and sine wave generator. It is a clock generator composed of an ordinary inverting gate and a few components, and it can output two waveforms with the same frequency simultaneously: square wave and sine wave. The oscillator can work well in the frequency of 100Hz ~ 10MHz. If using non-buffered output stage 74HCU00 replaces the 74HC00, it will have a better effect. (View)
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Published:2011/4/18 4:52:00 Author:Rebekka | Keyword: Wireless remote control, ceiling fan
Ceiling fan wireless remote control transmitter circuit.
Ceiling fan wireless remote control receiver circuit.
In transmitter circuit:IC1 is line 10-line 4 priority encoder CD40147;IC2 is the digital encoder MC145026;IC3 is the long-wave emission component T630.In receiver circuit:IC1 is a long-wave receiver module T631;IC2 is a digital decoder MC145027;IC3 is a 4-16 line decoder CD4514.
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Published:2011/4/19 1:48:00 Author:Ecco | Keyword: +6.7V, 0.56A , Cell phone , battery, constant-current , charger
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Published:2011/4/19 1:44:00 Author:Nicole | Keyword: festival color lamp, piano music, program control
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Published:2011/4/19 1:26:00 Author:Nicole | Keyword: color lamp, piano music
As shown in the figure, it consists of clock beat generator, light control circuit, middle power amplifier and AC depressurization, steady voltage circuit. CA3130(IC1) is a BiMOS single operational amplifier, it with RP1, R3, C1 will from a self-excited oscillator, the oscillation frequency depends on the charge and discharge time of RP1, C1. Its output beat pulse is used as SH-818 function control pulse. (View)
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Published:2011/4/19 0:56:00 Author:Nicole | Keyword: bidirectional SCR, dimming light
As shown in the figure, this is a simplest bidirectional SCR dimming light circuit, the feature of it is that adding proper trigger pulse or control current to its control pole, it will turn on whether it is AC positive half cycle or negative half cycle, the conduction time depends on the pulse width and gate current. To adjust RP will change the brightness of bulb E. (View)
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Published:2011/4/19 0:46:00 Author:Nicole | Keyword: unidirectional SCR, dimming light
As shown in the figure, this is a simplest unidirectional SCR dimming light circuit, the two 3~5A/600V unidirectional SCR are antiparallel, their gates are connected by a 100kΩ potentiometer, then they form a stepless dimmer with 200W load. (View)
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Published:2011/4/18 23:50:00 Author:Nicole | Keyword: showcase or bulletin board, timing light, controllor
As shown in the figure, it is a showcase or bulletin board timing light controllor composed of two electronic tables, the electronic table 1 is used to set everyday lighting up time, the electronic table 2 is used to set everyday turn-off light time. (View)
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Published:2011/4/10 20:49:00 Author:muriel | Keyword: 12V , regulated voltage power supply, series and parallel connection combination
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Published:2011/4/19 1:06:00 Author:Ecco | Keyword: Analog, sound generator , telephone ringing , IC
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Published:2011/4/19 1:08:00 Author:Ecco | Keyword: Adjustable, duty cycle , 555, multivibrator
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Published:2011/4/19 1:18:00 Author:Ecco | Keyword: acquisition circuit , light isolation, data
LTC1292 is a monolithic 12-bit data acquisition system. Built-in sample and hold circuit work under 5V single supply. Connecting to wire 3 directly, it is suitable for most serial and parallel interface port of MPU. The maximum rate of passing information is 60kHz, the resolution is 12-bit, the maximum conversion time in the operating temperature range is 12μs, the low current is only 6.0mA.
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Published:2011/4/19 1:20:00 Author:Ecco | Keyword: Adjustable, voltage regulator
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Published:2011/4/19 1:00:00 Author:Ecco | Keyword: high voltage, electrostatic , generator
The multi-function high-voltage electrostatic generator is based on 555, if matching with high back voltage diode and discharge brush pin, it can be used as a negative oxygen ion generator, ignition, static vacuum cleaner, or high security, etc. 555 and R1, R2, C2 form a multivibrator with non-steady state, the oscillation frequency F = 1.44 / (R1 +2 R2) C2, the argument in the figure is about 20KHZ. After boosted by the transformer T1,then it will get 20KHZ 10KV high voltage on secondary of T1, and it will be 7KV after rectified by D1, the load current can reach 50UA. (View)
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Published:2011/4/18 22:30:00 Author:Nicole | Keyword: relay, timer, time process
In figure (a), the circuit has two-stage circuit structures, the timing time is about 0.5~12s, and in figure (b), the range of the timing time is 1~160s.
The parameters of transformer: iron chip: M42/15.7 silicon steel sheet; winding: Φ0.18mm, enameled copper wire 1200turns.
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Published:2011/4/18 21:06:00 Author:Nicole | Keyword: Ni-Cd battery, charge control
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