Electronics Circuits Diagrams, DIY Electronics Projects, Circuit Schemati...

[...] circuit diagram .This variable regulator circuit will provide an variable regulated output voltage , between 0 and 50 volts . The CA3140 operational amplifier compares the regulator output to [...]

[...] A very lab adjustable power supply that can provide an output voltage between 0 and 60 volts can be designed using this circuit diagram . This lab power supply can [...]

[...] the widely-available type BS170 FET. When power is applied it is driven on via R1. When the output voltage reaches 5.1 V, T2 starts to conduct and limits any further rise in the output voltage by [...]

[...] LED current 120mA or more to 2.8-4.2V input. IC observes the power-supply voltage and the output voltage, and does an automatic change to the best of step up mode 1, 1.5 or 2 times. It is possible [...]

You cannot beat the Chinese. The project described in this article is a ready-made item from a $2.00 shop! And it is made in China! It is a wireless d [...]

This easy to construct “Handy pen torch” electronic circuit and low component count, uses two power white LEDs for lighting. Low volt (4.8V dc) su [...]

Description: This is a compact three transistor, regenerative receiver with fixed feedback. It is similar in principle to the ZN414 radio IC which is [...]

This simple Door Chime protects the door and gives a loud Alarm tone when there is an attempt of theft. The circuit is too simple and battery operated [...]

[...] to avoid false triggering. 555 IC pin functions Pin1 Ground Pin2 Trigger Pin3 Output Pin 4 Reset Pin 5 Control voltage Pin 6 Threshold Pin 7 Discharge Pin 8 Vcc Functional aspects of pins Trigger [...]

[...] night, LDR cease to conduct and the reset pin will be grounded through VR1. This triggers the IC and it stats oscillating using the components [...]

[...] counter CD4017. It has 10 outputs. Of these 8 outputs are used. Output 9 ( pin9) is tied to the reset pin 15 to repeat the cycle. When the input pin 14 of IC2 gets low to high pluses, its output turns [...]

[...] conducts and provides base bias to T1. The NPN transistor T1 conducts and takes the reset pin 4 of IC1 to ground potential. IC1 is wired as an Astable oscillator using the components [...]

[...] 6 Volts. To protect any device from over voltage, there are ways such as adding relays or a zener diode. A relay switch functions by opening or closing under the command of another circuit. But [...]

[...] provided with excess power. The capacitor does not withstand a high voltage and hence a zener diode is connected in parallel to handle the high voltage. The diode protects the capacitor [...]

[...] LM317T Voltage Regulator Heat Sink DC Power Jacks Green LED: Power Red LED: Over Voltage Zener Diode: over voltage LED switch The zener diode switches on the over voltage LED if the voltage [...]

[...] include a bridge rectifier and an electrolytic capacitor. This will be followed by an 8V2 Zener diode rated at 0.4W, which provides the regulation of voltage in the transistor as it is connected in [...]

[...] denting the shelf life. Of course, the stormier it gets, the shorter the battery life. Circuit diagram For best effect, mount the lamp in an old-fashioned holder with an extra-large colored [...]

[...] about ON or OFF of the system while the function of the switch depends on it previous state. Circuit Diagram: This circuit turned on when the super-alpha pair of transistors receives a very small [...]

[...] A very simple portable 12 to 250V converter can be designed using this circuit diagram. This 12 to 250V converter is designed for portable use with a 12 V car battery.A built [...]

[...] tools to work on the car such as laptops and other electronic devices. The following circuit diagram shows a way of powering a two-way mobile radio using the LM317T voltage regulator. The [...]

[...] the T1 time interval. The high output level of the 555 timer is 1.7 volts less than the supply voltage. Adding the LED increases the forward voltage required for the PNP transistor to about 2.7 [...]

[...] glitch free operation at power-up and power-down) CMOS Input Logic Threshold (function of supply voltage with hysteresis) Hysteretic Logic Thresholds for High Noise Immunity EN Pin for Enable [...]

[...] coil voltage is used. Sound activated switch circuit diagram When you first connect the supply voltage to the sound activated switch circuit, the relay will be energised because of the effect of [...]

[...] the other inputs. The circuit uses all CMOS IC's part numbers shown on the diagram. The supply voltage may be anything between 3 and 15 volts. Alternatively, it may be built using equivalent TTL [...]

[...] short circuit. Project Description Relays must be chosen with a voltage value equals to the input voltage. Don’t omit using the 100uF capacitor with appropriate voltage value with respect to the [...]

[...] Using this schematic can be made a network voltage indicator electronic circuit. If the input voltage is present across the network, the optocoupler transistor is open, T1 is blocked and [...]

[...] configuration where the output voltage has the same polarity with either polarity of the input voltage. 1N4002 – a 1.0 Amp Silicon rectifier with voltage range of 50 to 1000 Volts and possessing [...]

[...] voltage between the positive input ( noninverting ) of the CA3140 and ground . The unregulated input voltage must be around 60 volts The output voltage can be set between 0 an 50 volts using R9 [...]

[...] a constant light output for input voltages ranging from 8 to 18 volts! Circuit Source: DIY Electronics Projects [...]

[...] identical to those in the doorbell products we bought for this article. Circuit Source: DIY Electronics Projects [...]

[...] unit inside a small plastic enclosure for safety and convenience. Circuit Source: DIY Electronics Projects [...]

[...] state and the other terminal of the buzzer is connected to ground. Circuit Source: DIY Electronics Projects [...]