| Author | Views | Views Today | Rank | Comments |
| 66,246 | 41 |   |
16 |
| Author | Views | Views Today | Rank | Comments |
| 66,246 | 41 | |
16 |
| This simple and inexpensive circuit can produce a dual (positive and negative) voltage from a single supply input. It is therefore extremely useful for powering opamp and other circuits that require a dual voltage from a single battery. The circuit will operate at an input voltage from around 5V to 20V and produce a output from +-2.5V to +-10V. |
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| you have been a great help to many peoples in career and more especially to me thanks for your good works | ||
| This circuit can be used to power a small strobe or fluorescent lamp. It will generate over 400 VDC from a 12 VDC, 2.5 A power supply or an auto or marine battery. While size, weight, and efficiency are nothing to write home about - in fact, they are quite pitiful - all components are readily available (even from Radio Shack) and construction is very straightforward. No custom coils or transformers are required. If wired correctly, it will work. Output depends on input voltage. Adjust for your application. With the component values given, it will generate over 400 V from a 12 V supply and charge a 200 uF capacitor to 300 V in under 5 seconds. For your less intense applications, a fluorescent lamp can be powered directly from the secondary (without any other components). This works reasonably well with a F13-T5 or F15-T12 bulb (but don't expect super brightness). Q1 does get quite hot so use a good heat sink. C1 1 uF D2 1N4948 R2 +------||------+ T1 1.2KV PRV 1K 1W | | +-----|>|-----//---+------o + | R1 4.7K, 1W | red ||( blk | +-----//-----+------+ ||( | | yel )||( +_|_ C2 + o----------------------------------+ ||( --- 300 uF | red )||( - | 450 V | +--------------+ ||( | | Q1 | ||( blk | 6 to 12 | |/ C +--------------------+------o - VDC, 2A +----| 2N3055 Stancor P-6134 D1 _|_ | E 117 V Primary (blk-blk) 1N4007 /_ | 6.3 VCT Secondary (red-yel-red) | | - o------------+------+ | ||
| the astable multivibrator is not working. It will be wise and more appropriate to use a driver/pre amplifier to drive the power transistor before feeding it to the transformer. | ||
| Hi! i find this design very usefull, thanks... i would like to know if there will be a change to increase the ouput voltage to at least ±12 to ±15 volts? What will be the new design? | ||
| Can you be kind enough to furnish me with a circuit to double the Secondary output voltage of this transformer. I believe that the current in this respect is divided by 2. Regards Ralph | ||
| Hey! You couldn't possibly be able to tell me how many amps this can handle? I need it so i can create a phase shift oscillator for my op amp, that means i can make a near sine wave to power my inverter! | ||
| Your site is fantastic I have viewed Your site please can you give me more explanation on the complete circuit of 5KVA inverter and 10KVA Inverter and there circuit board with the automatic changer thanks you | ||
| please i need a power supply with 12 v,24 ,16, 180v which can be regulated | ||
| Thanks for your site but how do I keep the cell from bein dead? | ||
| I write this mail in regards 5KVA to 10Kva inverter circuit board. I would like that you explain me the circuits if you can. regards diego | ||
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