electropank
- Jun 22, 2004
- 2
- Joined
- Jun 22, 2004
- Messages
- 2
Can any body tell me how can I make a power-full Infrared flud light. If yes please give me full discription along with part list ( Part Specifications ) & ciruit diagram too.
audioguru2
- Apr 6, 2004
- 12,026
- Joined
- Apr 6, 2004
- Messages
- 12,026
Hi Electropank,
Welcome to our forum.
Anything that is hot radiates infrared energy. The sun, a fire, an electrical heater and even living mammals give off infrared energy.
What are you making that requires you to flood an area with infrared "light"?
Welcome to our forum.
Anything that is hot radiates infrared energy. The sun, a fire, an electrical heater and even living mammals give off infrared energy.
What are you making that requires you to flood an area with infrared "light"?
infrared spotlights are usefull for close circuit tv cameras so you can see in the dark like night vision jayvar electronics in australia sells the kits for these infrared spotlights ,
Y
Yevgenip
- Jan 1, 1970
- 0
Use an Infrared lamp and connect it to a 555 timer. it will blink fast enough to create infrared.
Used it once to make a parking helper.
Yevgeni.
Used it once to make a parking helper.
Yevgeni.
Y
Yevgenip
- Jan 1, 1970
- 0
Good Idea!
I'll post it in a while (Want to make it look good).
;D
I'll post it in a while (Want to make it look good).
;D
Y
Yevgenip
- Jan 1, 1970
- 0
audioguru2
- Apr 6, 2004
- 12,026
- Joined
- Apr 6, 2004
- Messages
- 12,026
Hi Yevgeni,
Questions about your nice parking helper circuit:
1) Doesn't the sensitivity of the circuit depend on the reflectiveness (colour and shinyness) of the wall? Perhaps it should have a sensitivity adjustment.
2) Wouldn't the circuit be more stable by using a lower-voltage regulator? If the car battery's voltage drops much below about 15V, a 12V regulator may drop-out. Perhaps a 9V regulator is more suitable.
3) Using a value of only 33 ohms for the IR transmitter's current limiting resistor, isn't the resulting >300mA of current rather high for the IR transmitter and the 555? However, I do notice the 1:10 duty cycle that reduces the average current.
4) You seem to be using the IR receiver as a photo-voltage source. Wouldn't it be more sensitive if it was used as a reverse-biased photo-conductor (leaks current with IR pickup) or by using an IR photo-transistor and the opamp used as a capacitor-input non-inverting amp?
5) Doesn't C3 charge after a few cycles then without having a diode to discharge it for each cycle, reduce the output voltage of the rectifier?
Questions about your nice parking helper circuit:
1) Doesn't the sensitivity of the circuit depend on the reflectiveness (colour and shinyness) of the wall? Perhaps it should have a sensitivity adjustment.
2) Wouldn't the circuit be more stable by using a lower-voltage regulator? If the car battery's voltage drops much below about 15V, a 12V regulator may drop-out. Perhaps a 9V regulator is more suitable.
3) Using a value of only 33 ohms for the IR transmitter's current limiting resistor, isn't the resulting >300mA of current rather high for the IR transmitter and the 555? However, I do notice the 1:10 duty cycle that reduces the average current.
4) You seem to be using the IR receiver as a photo-voltage source. Wouldn't it be more sensitive if it was used as a reverse-biased photo-conductor (leaks current with IR pickup) or by using an IR photo-transistor and the opamp used as a capacitor-input non-inverting amp?
5) Doesn't C3 charge after a few cycles then without having a diode to discharge it for each cycle, reduce the output voltage of the rectifier?
