| casian |
Fixed Voltage Power Supply |
Sunday, August 02, 2009 5:11:11 AM |
| what is fuction of diode D2 in the circuit? |
| Numlock |
Fixed Voltage Power Supply |
Monday, March 30, 2009 4:56:20 AM |
| Hello,
I've been building grow light panels using cement mixing tubs from a home center and high output LEDs. The combination of 1 blue (465nm) to every 3 red (650nm) works very well. The LEDs that I use are 10,000mcd with iF of 30ma at 3.6vF. To this point I have been buying used 36VDC golf cart battery charging transformers. These chargers average 36VDC with spikes up to 36.2VDC so I run multiple series of 10 LEDs with 6.8Ohm 1/4 watt resistors per series. I use a grid of 17 x 21 with 3/4" on center. This leaves 3 LEDs unaccounted for so I place them on the panel enclosure as 'decorations'. My problem is that all of this depends on golf cart battery chargers remaining available and inexpensive. I find that it is getting harder and harder to find then. I think that most carts are now operating at 24VDC or 48VDC and that 36VDC is an obsolete design. That just means that I need to build my own.
The design pulls 1,080ma of current and draws 39,100.32mw of output power.
I have looked at 18VDC but an ideal design pulls 2,160ma of current at 18VDC. 2A is not quite enough and 5A transformers are ridiculously expensive.
Is there a design out there for a 110/120VAC to 36VDC power supply?
Thank you |
| Bablu |
7-segment display-com.anode type. |
Wednesday, January 14, 2009 10:18:47 AM |
| I've Constructed a CKT Of 7-segment display anode type which uses conman anode type display.I've obtained the output which mean display shows digit from'0-9' but whats happened the no. is appearing randomly.please send me a solution on it |
| Mir Qadeer Ali |
Fixed Voltage Power Supply |
Saturday, August 23, 2008 3:40:12 PM |
| i have constructed 230v ac to 9v dc, by using 12v transformer and 7809 regulator, now am in need of 6v dc, what modification i should from the above, or i have to built seperate circuit by using 6v transformer and 7806 regulator, let me know by my email as soon as possible , thank you |
| Graham |
Fixed Voltage Power Supply |
Wednesday, May 21, 2008 1:01:12 AM |
| Hi, Please help me I need to step down DC voltage from +/-13 -14.4V to 11.5 - 11.9V @ 3A DC can you help? |
| Stram |
Fixed Voltage Power Supply |
Tuesday, April 29, 2008 11:22:24 AM |
| a friend from U.S.A. gave me an HP Printer/Scanner without a power supply, since i am fond electronics assembling, i want to assemble a 24V greater than1.5A fixed regulator. Please help and provide me
Thank you very much,
STRAMM |
| Maxspower |
Fixed Voltage Power Supply |
Tuesday, April 15, 2008 4:37:08 PM |
| "What si the prupose of the fuse and capacitors" . . . love it! LOL |
| sammaking |
Fixed Voltage Power Supply |
Tuesday, February 26, 2008 5:31:39 AM |
| please help me out with the circuit diagram of a variable dc output (-12,+12 & +5v) power supply of 110v ac input |
| eliya |
Fixed Voltage Power Supply |
Tuesday, February 19, 2008 12:16:11 AM |
| how about if the output voltage is 25 Vdc and the maximum output current is 5 Ampere? how the circuit going to be?this power supply will use the source from 240 Vac.can u please help me on this problem.reply to my email.thank you |
| mebrahtu |
Fixed Voltage Power Supply |
Friday, January 04, 2008 1:43:54 AM |
| In the above citcuit u1 means transistor please explane |
