DS

Priject of Receiver and Transmitte r Low Cost Data Circuit Diagram. Here are two simple circuits that can be used for transmission and reception of data via RF to UHF frequency (433MHZ). Two circuits are super simple, no special components and has a good performance, but short range. It is set to the frequency of 433MHZ, but nothing prevents that with some modifications it works on other frequencies.  Receiver and Transmitter Low Cost Data Circuit Diagram 1 The range is small, ideal for data transmissions within an environment like office, garage, laboratory, workshop or room. This system of data communications short-range 434MHz can be used in projects of alarms, electronic gates, trigger devices from a distance, Arduino, etc. .. X1 is working on a crystal harmonic (433.92Mhz) and L1 receiver comprises 1.5 turns of wire must be tested diameter and thickness to reach the perfect reception of the transmitter.  Receiver and Transmitter Low Cost Data Circuit Diagram 2 You can mou...

This is a simple ceiling fan regulator circuit diagram. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because it's control the speed of a AC motor(Ceiling Fan).  This ceiling fan regulator circuit built with few numbers of parts. The circuit mainly  based on Z0607 TRIAC. This is a low power AC semiconductor device. Generally which is used to controlling speed of low power ac motor speed.  Circuit Diagram of Ceiling Fan Regulator :      In this ceiling fan regulator circuit , R1=500KΩ is a variable resistor that is used to adjust the fan speed. Capacitor C1 2A104J is a Polyester film capacitor. Pin Diagram of  TRIAC(T1)- Z0607:  Fig: Z0607-TRIAC Pin diagram Pin Diagram of Variable Resistor R1: Fig: Pin Diagram of Variable Resistor Parts List Ceiling Fan Motor Speed Controller circuit: T1 = Z0607 -TRIAC D1 = DB3 C312 -DIAC R1 = 500KΩ -Variable Resistor R2 = 37KΩ -Resistor C1 = 2...

Hello! in this post I will show a very small circuit, the relay opens and closes its contacts intermittently, the speed can be changed by changing the value of C1, the output relay can be turned on an LED, working as a wink - wink! The relay coil and the capacitor voltage is in accordance with the circuit power!  See the figure below:

This circuit is a simple form of the commercial UPS , the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply. In the event of electrical supply line failure the battery takes over, with no spikes on the regulated supply. This circuit can be adapted for other regulated and unregulated voltages by using different regulators and batteries. For a 15 Volt regulated supply use two 12 Volt batteries in series and a 7815 regulator . There is a lot of flexibility in this circuit. TR1 has a primary matched to the local electrical supply which is 240 Volts in the UK. The secondary winding should be rated at least 12 Volts at 2 amp, but can be higher, for example 15 Volts. FS1 is a slow blow type and protects against short circuits on the output, or indeed a faulty cell in a rechargeable battery. LED 1 will light ONLY when the electricity supply is present, with a power failure the LED will go out and output voltage is maintained by the battery. The circuit bel...

This article is of interest only to readers whose bicycle lights are powered by a dynamo. The laws on bicycle lights in the United Kingdom are stricter than in other countries and a dynamo is, therefore, a rarity in this country. From the point of view of traffic safety it is advisable (in UK obligatory) for cyclists to have the rear lamp of their bicycle to light even when they are at standstill. In principle, it is not very difficult to modify the existing rear light with afterglow: all this needs is a large enough energy reservoir. Since the after-glow is required for short periods of time only, a battery is not required: a large value capacitor, say, 1 F, is quite sufficient. As the circuit diagram shows, in the present circuit, the normal rear light bulb is replaced by two series-connected bright LEDs, D2 and D3. These are clearly visible with a current of only 6 mA (compared with 50 mA of the bulb). The current is set with series resistor R1. The LEDs are shunted by the 1 F cap...

Let me ask this simply, then explain my use case below. This is a Easy Line Activated Solid State Switch Project . Each and every time a phone on the same line or calling numberis taken off-hook, the circuit will be activated to control an external electronic circuit. If several extension telephones are used on one phone line, the circuit can be useful as a busy indicator. LEDl contains a special flashing red LED that makes an excellent indicator for a busy circuit condition.   Line Activated Solid State Switch Project Circuit Diagram The solid-state switch can be used for several other phone-activated applications, such as automatically turning on a cassette recorder, starting a phone-use timer or counter, etc. A small relay can be connected at points A and B, in place of LEDl, to control external circuits. A 117-Vac-to-6-Vdc plug-in power supply can be substituted for the battery to keep the operating cost at a minimum.  The 48-Vdc, on-hook, phone-line voltage keeps Ql...

This Simple Horn Bugle Electronic Circuit Diagram just a door trigger input 4093, bound in a low frequency oscillator, as the transistor Q1, which is the IRF511 FET amplifier is directly connected to a small speaker with horn. The output frequency can be changed by adjusting potentiometer R1. Simple Horn Bugle Electronic Circuit Diagram

This is the Simple Light Detector Circuit Diagram. Variable resistor R1 adjusts the light threshold at which the circuit triggers. R1's value is chosen to match the photocells resistance at darkness. The circuit uses a CMOS 4001 IC. Gate U1a acts as the trigger, U1b and c form a latch. S1 resets the circuit. The output device may be a low power piezo buzzer.  Simple Light Detector Circuit Diagram   Author:   Mick Devine, UK

This is Indicator consumption AC Load Circuit Diagram . Some types of electronic equipment does not show that in fact they are consuming energy when they are plugged into an outlet. This pilot light is not required if the unit consumes less than 10 watts according to international standards. But if you turn off the equipment, will be contributing with nature and your pocket, reducing the bill. One way to detect the AC power being consumed, independent of the load is connected in series with a diode AC power supply. In this circuit 6A diodes have been used which can withstand a peak current of 200A is not repeated. Indicator consumption AC Load Circuit Diagram The voltage between the diodes serves as the voltage supply for the LED and circuit. To increase the sensitivity of the circuit, we used a voltage doubler consisting of C1, D7, D8 and C2 is used to double the voltage of D1-D6. Another advantage of this scheme is that both reduce by half waves of alternating current. Must use Schot...

This circuit is a circuit diagram is included in the RF circuit. FM Transmitter circuit diagram using the IC BH1417. Where the integrated circuit design from RHOM which includes many features in one small package. He came with pre-emphasis, limiter so that music can be transmitted in the same audio level, stereo encoder for stereo transmission, visit page. FM Stereo Transmitter circuit diagram

For a lower parts count than the 2 transistor multivibrators, 2 LED s can be alternately flashed with a 555 integrated circuit configured as shown in Schematic 2.  I chose the combination of a 2K2 and a 47K resistor to determine the oscillation frequency along with the 10 uF capacitor connected to pins 2 and 6. You can practically change the (R Speed) 47K value to between 10K and 100K or more. Greater resistance = lower speed. You may also wish to connect up a 100K or so potentiometer instead of the 47K resistor for a variable speed version. Additionally, the 10 uF capacitor value can be changed. Feel free to experiment. Although, alternately flashing LED s  is great for the beginner to electronics, the basic one ON, one OFF circuit gets boring quickly. In the next section, we will try to improve the look and try to approximate a flash like a police car (within limits).

This is a simple project of Mains Slave Switcher II Circuit Diagram . As a guide, a one-inch reed switch with 40 turns reliably switched on with the current flowing through a 150-watt lamp (approx. 625 mA) but larger reeds may require more turns. If the master appliance draws less current (which is unlikely with power tools) more turns will be required. The reed switch is used to switch on transistor T1 which in turn switches the relay RE1 and powers the slave appliance. Since reed switches have a low mechanical inertia, they have little difficulty in following the fluctuations of the magnetic field due to the alternating current in the coil and this means that they will switch on and off at 100 Hz. Mains Slave Switcher II Circuit Diagram: Mains Slave Switcher II Circuit Diagram C3 is therefore fitted to slow down the transistor response and keep the relay energised during the mains zero crossings when the current drawn by the appliance falls to zero and the reed switch opens. C1 drops...

This little circuit indicates the basic integrity of a printed board, detecting 0V, positive supply voltage from less than 3V to 30V and floating parts. If the probe is floating, as it would be in a broken track, then both LEDs barely light up, since there is no current to drive the transistors, but if the probe touches 0V or a positive voltage one or other lights. A digital signal should light them in proportion to the mark-space ratio whereas the output of a circuit oscillating at a frequency rate below about 20Hz will cause the LEDs to flicker alternatively. The LEDs will illuminate always at a constant intensity, no matter the voltage supply used, because they are fed by a very simple FET constant-current generator (Q1). Circuit diagram: Circuit Board Checker Circuit Diagram Parts: R1 = 22K R2 = 22K D1 = Red LED D2 = Green LED Q1 = BF245 Q2 = BC547 Q3 = BC557 Notes: The Black clip must be connected to the negative ground of the board under test. The Red clip should be connected to ...

This is the Simple  RF Transmitter for PIR Sensors Circuit Diagram.

DSP  POWER AMPLIFIER VIDEO SERVICE MODE CLICK ON THE PICTURES TO ZOOM IN

     This is the Simple 300mA DC to AC converter Circuit Diagram. This circuit was used to provide battery backup to a device that had an AC (output)wall transformer. Due to the quasi sine-wave output and imprecise 60Hz output frequency, some devices might not work pro perly. Peak output is the DC input voltage minus about 20 ohms drop. Use bigger output MOSFETS for more current output.[link]  Simple 300mA DC to AC converter Circuit Diagram

This Selector Antennas using PIN Diodes Circuit Diagram selector antennas uses PIN diodes, was designed using common components and is very useful when used various external antennas, this antenna selector uses PIN diodes that eliminate disadvantages of mechanical switches especially at high frequency.  Capacitors C1 to C4 and C9 are used to prevent the input and output circuit DC. Shock L1 to L5 prevent leakage of HF signal.Shock L1 to L5 can be wound on a ferrite core, using enameled copper wire of 0.3 mm in diameter, two rounds will suffice for entries for VHF and UHF 5 (1 mH is required for VHF and UHF about 5 uH). The circuit was designed for antenna input impedance of 50 or 75 ohms. Selector Antennas using PIN Diodes Circuit Diagram

This High Power LEDs up to 15 Amperes Circuit Diagram employs a simple scheme that limits the current flow to the LED, you can easily modify the circuit, and can change the power just replacing the value of R2. You can use a DC source of any tensions between 9V to 15V.Para powers or other LEDs just use the approximate formula: Current (I) = 0.8/R2 where I is the current specified by the LED manufacturer. Value of I this conductor is 10A. Use R2 = 0.8/Current formula (I) to determine R2. High Power LEDs up to 15 Amperes Circuit Diagram Parts List Q1 2N3055 or similar NPN transistor R1 1W 220ohms D1, D2 1N4001 silicon diode or rectifier See R2 power for each LED R2 for 1W LED 1W 2.7ohms R2 LED to 1.5 ohms 1W 3W 5W LED R2 to 0.6 ohms or 2 x parallel 1.2-ohms/1W

This short-wave converter, which doesn’t have a single coil requiring alignment, is intended to enable simple medium-wave receivers to be used to listen to short-wave signals. The converter transforms the 49-m short-wave band to the medium-wave frequency of 1.6 MHz. At the upper end of the medium-wave band, select an unoccupied frequency that you want to use for listening to the converted short-wave signals. Good reception performance can be obtained using a wire antenna with a length of one to two metres. The converter contains a free-running oscillator with a frequency of around 4.4 MHz, which is tuned using two LEDs (which act as variable-capacitance diodes!) and a normal potentiometer. The frequency range is set by adjusting the emitter current using a 1k trimpot. The oscillator frequency depends strongly on the operating point. This is due to the combination of using an audio transistor and the extremely low supply voltage. Under these conditions, the transistor capacitances are r...

All miniature electronic devices operate off batteries. Some of them need higher than the standard battery voltages to operate efficiently. If the battery of that specific voltage is unavailable, we are forced to connect additional cells in series to step up the DC voltage. Thus, the true meaning of miniaturisation is lost. A simple way to overcome this problem is to employ a voltage doubler, if the device under consideration can operate at a small current. Here we present a low-power voltage doubler circuit that can be readily used with devices that demand higher voltage than that of a standard battery but low operating current to work with. The circuit is quite simple as it uses only a few components. Yet, the output efficiency is 75 to 85 percent along its operating voltage range. The available battery voltage is almost doubled at the output of the circuit. Here IC1 is wired as an astable multivibrator to generate rectangular pulses at around 10 kHz. This frequency and duty cycle of...