Step 2: The Schematic:

The schematic is given below.it would be better if you built it in 3 different parts-like i have done it.
The 555 timer circuit:
-connect  pin2 to pin6
-connect pin 4 to pin v+
-connect pin 1 to V-
-connect pin 8 to V+
-connect a 47k resistor between pins 6 and 7
-connect a 100k resistor(you may have to experiment with this value)between pin 7 and V+
-connect the positive of the capacitor to pin 2 and the negative of the capacitor to V-
-connect pin3 to the emitter of the 2n2907 transistor.
the first part is complete

The proximity sensor:
-connect pin4 to V-
-connect pin7 to V+
-connect a 1M reistor between V+ and pin2
-connect a 1M resistor between V+ and pin3
-connect a 1M resistor between V-  and pin2
-connect the cathode(shorter lead) of the photodiode  to V-
and longer lead(anode) to pin3
-connect a 1.5k resistor between pin6 and the base of the transistor.

_______the second part is complete

The 4017 counter
-connect pin8 to V-
-connect pin16 to V+
-connect the anode(the end of the diode with no band) of 1n4148 diodes from pins 3,4,5 and 10 and connect the cathode(the banded end of the diode is cathode) of all the diodes.
-connect a 1k resistor between  the connected cathodes of the diodes and  the base of the 2n3904 transistor 
-connect the collector of the 2n2907 transistor to pin 14  
____the third part is complete 

Finishing up!
identify the pin contacts of the relay
-connect the emitter of the 2n3904 transistor to V-
-connect the collector of the transistor to either of the pin on both sides of the common pin of the relay.
-connect the other pin on the other side of the common pin of the relay to V+
-connect the cathode of the diode(banded end) to the pin where V+ goes into and the un-banded end(anode) to the collector of the transistor(pin on the other side of the common pin of the relay)*
-connect a 0.1uf capacitor between V+ and V-**
-connect a 0.1 uf capacitor between the 2 pins on both sides of the common pin of the relay**

HANDLE THIS PART OF THE CIRCUIT WITH EXTREME CAUTION :!!(-make sure you are not working with the relay when the 220v ac supply is on.)
-connect one of the two lines of the 220v ac supply to the common pin of the relay 
-connect the other line of the 220v ac supply to your bulb,cfl or appliance.
-connect the NO pin(normally open) of the relay to your appliance or bulb (if you don't understand this part see the schematic diagram)


Powering up!!
-connect the 9v battery with its polarity properly connected.
-in case you are using an adapter use an 100uF electrolytic capacitor between V+ and V-
-in case the circuit's not working properly  move on to the next step

*the diode is to make sure the relay does not turn off or on in case of voltage spikes
**the ceramic disc capacitor is used as a noise filter

in case you want to download  a pdf of the file the download is below,it's called AMTFL(analog motion triggered fluorescent bulb)
<p>I think(?) I see a fan in your bill of parts. What is this for? Also, can you upload bigger picture of the actual parts?</p>
<p>hey everyone: i assume this is a fake instructable, since there are so many inconsistencies between schematics and instructions, and i made this circuit and it doesn't work either way (following schems and instructions) (i'm an amateur at electronics).</p><p>but there's a nice comeback: i've learned a lot of theory of electronics, and i had to read a few books trying to solve this nonsense circuit....so....this was not an entirely negative experience for me (i mean making this non-working fake circuit). </p><p>greetings from argentina, south america.</p>
<p>Well Michel, maybe circuits don't really work in Argentina? Before you trash someone else's work be sure that you have got everything right . What with you being a genius amateur electronics hobbyist i'm sure there's no reason for you to be wrong . I'm 14 and this is one of the circuits i've ever made on a perfboard , so even if i made a mistake i can still correct it so cut me some slack man .Also if i was wrong I would be glad to accept it because that would only enrich my knowledge and it won't diminish my honour just because some person claims my work is trash </p><p>Greetings from tamilnadu, India , one of the few places where circuits work </p>
<p>hi Strontium, thank you for the reply. Please notice that i pointed an inconsistency between the schematics and the instructions a month ago. since you didn&acute;t answer my polite question at that time i had to assume that this is an abandoned thread. can you help me to make this circuit working? please read my first comment below here. thank you very much and have a beatiful day there :)</p>
<p>hi there, shouldn't it be: </p><p><strong><em>-connect a 1M resistor between V- and pin3</em></strong></p><p><strong><em>instead of:</em></strong></p><p></p><p><strong><em>-connect a 1M resistor between V- and pin2</em></strong></p><p><strong><em>?</em></strong></p><p><strong><em>:)</em></strong><br></p><p></p>
I don't know why I can't reply posts. Vsuresh1 thanks for the explanation and I will build it immediately. Great Instructable
@Philiprocks <br>-you're welcome and if you think my instructable is good enough please vote for me in the epilog challenge and if you have any doubts with the circuit ,you can ask me and once again thank you.
The 4017 makes a great &quot; flip flop &quot; circuit. I have used this before and have been able to go from the photo transistor direct to pin 14 of the 4017 with out any circuit in between. Altho using an op amp or transistor i think would give more stability in the long run.
@WWC <br>-you 're right ,The LM741 provides not only stability but also makes sure the relay does'nt switch itself on/off in case of a bright light source a little distance away from the sensor .i would also like to see your version of this circuit <br>
I have a doubt, &iquest;why you use de 4017?
the 4017 in this case acts as an on/off switch for the relay.the 555 timers provides clock pulses for the 4017 counter(it's actually a led chaser circuit i have modified),but the LM741 opamp does not allow the clk pulse to go into the pin14(clk in) of the 4017 counter until an object passes over the Proximity sensor and allows the transistor to allow the clk pulse into the counter.if you held your hand in front of the sensor for too long you will see that the bulb or whatever you're switching on/off would keep clicking on/off rapidly.i've tied alternate outputs of the 4017 counter so that instead of acting as an led chaser ,it acts as an simple on/off switch. <br>
handy useful circuit. thanks
@NealH <br>-you're welcome
handy useful circuit. thanks

About This Instructable


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Bio: I'm an electronics hobbyist.I have a humongous interest in electronics.I enjoy building circuits,experimenting with ICs and MCus and fiddling and opening ... More »
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