Wiring And Schematic

Showing posts with label lamp. Show all posts

Sunday, October 26, 2014

220V AC Lamp Toggle Switch Circuit

Due to the low current drawing, the circuit can be supplied from 230Vac mains without a transformer. Supply voltage is reduced to 12Vdc by means of C1 reactance, a two diode rectifier cell D1 & D2 and Zener diode D3. IC1A, IC1B, R2, R3 and C3 form a reliable bounce-free toggle switch operated by P1. R4 and C4, wired to pin #6 of IC1B reset the circuit (lamp off) when power supply is applied. IC1C and IC1D wired in parallel act as a buffer, driving the Gate of the Triac through R5.

Circuit diagram:

220V AC Lamp Toggle Switch Circuit Diagram

Parts:

R1 = 470R
R2 = 10K
R3 = 100K
R4 = 100K
R5 = 1K
C1 = 330nF-400V
C2 = 100uF-25V
C3 = 100nF-63V
C4 = 10uF-25V
D1 = 1N4007
D2 = 1N4007
D3 = BZX79C12
D4 = TIC206M
IC1 = 4011 NAND Gate

Notes:

The circuit can be wired permanently to the mains supply as current drain is negligible.
Due to transformerless design there is no heat generation.
Low Gate-current Triacs are recommended.
Obviously, other appliances can be powered in place of a lamp, provided their power dissipation does not exceed about 400W @ 230V
110-120Vac operation is easily obtained by simply changing C1 value to 680nF 250V. No further changes are necessary.
In some cases, e.g. when the controlled device is far from the toggle switch, a pilot LED could be necessary for monitoring purposes. If so, disconnect pin #10 of IC1C from pin #11 of IC1D and wire a LED and its 1K series current limiting resistor across pin #10 of IC1C and negative supply.
Warning! The circuit is connected to 230Vac mains, so some parts in the circuit board are subjected to lethal potential! Avoid touching the circuit when plugged in and enclose it in a plastic box.
P1 will SPST Pushbutton

Tuesday, September 9, 2014

12 V Florescent lamp driver circuit

Here is a simple and effective schema for driving florescent lamps from a 12 V supply.The schema is nothing but consists of an oscillator, a MOSFET switch and a step-up transformer for driving the florescent lamp.

The IC1 TLC 555 is wired as an astable multivibrator for producing the necessary oscillations.The MOSFET Q1 is used to amplify the oscillations produced by the IC1.The out put of MOSFET is connected to the primary of the step up transformer to produce a ~400 V AC for driving the florescent lamp.

Notes.

* C3 and C2 must be 25V ceramic capacitors.
* C2 must be electrolytic.
* For T1, use a 10W ,230V to10V step down transformer in the inverted configuration.That is 10V winding must be connected to the MOSFET side and 240V winding must be connected to florescent lamp side.
* Use a 12V lead acid battery for powering the schema.
* It is better to fix a heat sink to Q1.
* The florescent lamp can be of a 4W one.

Friday, August 29, 2014

3V Fluorescent lamp voltage source

Fluorescent lamp assembly using only a 3V voltage source. 2 battery which i parallel to supply its circuit of fluorescent lamp. By using the above circuit is very useful if it saves electricity and power outages at home , or used in a dark place.

Circuit of works, and lamp lights

This is circuit , battery , and fluorescent lamp 20W


Working circuit on the dark

Interest with this circuit : Fish Caller Electronics

Monday, August 18, 2014

12VDC Fluorescent Lamp circuit

This schema is so impotent schema for the car owners.Most of time they have asked about a schema like this (12v Fluorescent lamp)so you can attach a colorful fluorescent lamp like this for your vehicle.

Parts:

C1 100uf 25V Electrolytic Capacitor

C2,C3 0.01uf 25V Ceramic Disc Capacitor

Q1 IRF510 MOSFET

U1 TLC555 Timer IC

T1 6V 300mA Transformer

LAMP 4W Fluorescent Lamp

MISC Board, Wire, Heatsink For Q1

C4 0.01uf 1KV Ceramic Disc Capacitor

R1 1K 1/4W Resistor

R2 2.7K 1/4W Resistor

note

1. Attach a heat sink for Q1
2.A 240V to 10V transformer will work better then the one in the parts list. The problem is that they are hard to find.