Showing posts with label regulated. Show all posts
Showing posts with label regulated. Show all posts
Friday, May 17, 2013
High Current Regulated Supply
The High Current Regulated Supply beneath uses an added ambagious or a abstracted agent to accumulation ability for the LM317 regulator so that the canyon transistors can accomplish afterpiece to assimilation and advance efficiency. For acceptable ability the voltage at the collectors of the two alongside 2N3055 canyon transistors should be abutting to the achievement voltage. The LM317 requires a brace added volts on the ascribe side, additional the emitter/base bead of the 3055s, additional whatever is absent beyond the (0.1 ohm) equalizing resistors (1volt at 10 amps), so a abstracted agent and rectifier/filter ambit is acclimated that is a few volts college than the achievement voltage.
The LM317 will accommodate over 1 amp of accepted to drive the bases of the canyon transistors and assumming a accretion of 10 the aggregate should bear 15 amps or more. The LM317 consistently operates with a voltage aberration of 1.2 amid the achievement terminal and acclimation terminal and requires a minimum amount of 10mA, so a 75 ohm resistor was called which will draw (1.2/75 = 16mA). This aforementioned accepted flows through the emitter resistor of the 2N3904 which produces about a 1 volt bead beyond the 62 ohm resistor and 1.7 volts at the base. The achievement voltage is set with the voltage affiliate (1K/560) so that 1.7 volts is activated to the 3904 abject back the achievement is 5 volts. For 13 volt operation, the 1K resistor could be adapted to about 3.6K. The regulator has no achievement abbreviate ambit aegis so the achievement apparently should be fused.
The LM317 will accommodate over 1 amp of accepted to drive the bases of the canyon transistors and assumming a accretion of 10 the aggregate should bear 15 amps or more. The LM317 consistently operates with a voltage aberration of 1.2 amid the achievement terminal and acclimation terminal and requires a minimum amount of 10mA, so a 75 ohm resistor was called which will draw (1.2/75 = 16mA). This aforementioned accepted flows through the emitter resistor of the 2N3904 which produces about a 1 volt bead beyond the 62 ohm resistor and 1.7 volts at the base. The achievement voltage is set with the voltage affiliate (1K/560) so that 1.7 volts is activated to the 3904 abject back the achievement is 5 volts. For 13 volt operation, the 1K resistor could be adapted to about 3.6K. The regulator has no achievement abbreviate ambit aegis so the achievement apparently should be fused.
Wednesday, March 27, 2013
5V DC REGULATED PHONE CHARGER ELECTRONIC DIAGRAM
5V DC REGULATED PHONE CHARGER ELECTRONIC DIAGRAM
Regulated phone charger which is used as an emergency charger for mobile phones with source from ordinary batteries, and works with 1.5V input DC voltage. At 5V, it can provide output to 70mA. If the current is drawn, the voltage will be drop. A006 microcontroller is used to create square wave which used to drive the Field Effect Transistor BBV93.
Thursday, March 21, 2013
1 5 35 Volt DC Regulated Power Supply
Here is the circuit diagram of regulated power supply. It is a small power supply that provides a regulated voltage, adjustable between 1.5 and 35 volts at 1 ampere. This circuit is ready to use, you just need to add a suitable transformer. This circuit is thermal overload protected because the current limiter and thermal overload protection are included in the IC.
Picture of the circuit:
Circuit diagram:
Transformer selection chart:
Parts:
IC = LM317
P1 = 4.7K
R1 = 120R
C1 = 100nF - 63V
C2 = 1uF - 35V
C3 = 10uF - 35V
C4 = 2200uF - 35V
D1-D4 = 1N4007
Features:
Specifications :
Technical Specifications
Note:
Picture of the circuit:
1A Regulated Power Supply Circuit Schematic
Circuit diagram:
1A Regulated Power Supply Circuit Diagram
Transformer selection chart:
Transformer selection Guide-Table For Power Supply
Parts:
IC = LM317
P1 = 4.7K
R1 = 120R
C1 = 100nF - 63V
C2 = 1uF - 35V
C3 = 10uF - 35V
C4 = 2200uF - 35V
D1-D4 = 1N4007
Features:
- Just add a suitable transformer (see table)
- Great to power your projects and save money on batteries
- Suitable as an adjustable power supply for experiments
- Control DC motors, low voltage light bulbs, …
Specifications :
- Preset any voltage between 1.5 and 35V
- Very low ripple (80dB rejection)
- Short-circuit, thermal and overload protection
- Max input voltage : 28VAC or 40VDC
- Max dissipation : 15W (with heatsink)
- Dimensions : 52x52mm (2.1” x 2.1”)
Technical Specifications
- Input Voltage = 40Vdc max Transformer
- Output Voltage = 1.5V to 35Vdc
- Output Current = 1.5 Amps max.
- Power Dissipation = 15W max (cooled)
Note:
- It has not to be cooled if used for small powers. 28 Volt AC max is allowed for the input voltage.
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