Buck and boost regulator using LM2578A
LM2578A can be used to make Buck and Boost regulator. Buck or step down regulator Vin = 15V Vo = 5V Io = 350 mA Parts Lists R1 = 40 kΩ R2 = 10 kΩ R3 = 0.15Ω C1…
A home to software testing, electronics circuits & projects, tips and tricks and digital diary.
A home to software testing, electronics circuits & projects, tips and tricks and digital diary.
Category Electronics
Buck and boost regulator using LM2578A
Buck or step down regulator Boost or step up regulator You can use the above circuit drive series of LED and make an LED driver circuit using this.
On-Off Switch using relay
Here’s how industrial equipment is started and stopped using push buttons(On-Off Switch). The circuit is called a “locked-out relay.” It uses an ordinary relay and the ON switch activates the relay to close the terminals. When the switch is released,…
Simple Battery Charger
Here is a very simple example of a low-cost battery charger for 12 v 7Ah lead-acid batteries. As shown in the figure, diodes 1N4001 (D1) and 1N4001 (D2) form a full-wave rectifier. The rectified voltage appears across SCR1 and the…
Basic Electronics – Resistance and Capacitor codes
Resistance colour codes Below is the table containing resistance colour codes. Each color band represents a number and the order of the color band will represent a number value. The first 2 color bands indicate a number. The 3rd color…
Raspberry Pi – Getting started
What is Raspberry Pi? The Raspberry Pi is a credit-card sized computer that plugs into your TV and a keyboard. It is a capable little PC which can be used for many of the things that your desktop PC does,…
LED Driver using 7805 and LM317
LED Driver using 7805 The 7805 can be converted into a content-current device by connecting a resistor as shown below. As the 12v rises from 0v, the 7805 starts to work and when the input voltage is 4v, the…
Simple doorbell Using UM66
Below is a simple circuit of doorbell using UM66. The circuit can be assembled in a general purpose PCB and enclosed in any toys. Parts C1 – 220 µF 10v VR1 – 100 k pot VR2 – 10 k pot…
LED Torch with adjustable brightness
The Led torch with adjustable brightness circuit uses LM3914 as the basis of a 10 step variable brightness current-regulated white LED . This circuit has only four components in the control and regulation circuit: R1,R2, VR1 and LM3914. Part List 1.…
Mains Powered LED Lights
All mains powered LED circuits work with 240 volt AC current. Mains powered LED – Single LED The power diode in the first diagram is designed to discharge the 220n during one half of the cycle so that the capacitor…