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Archive for July, 2007

DC24V to AC220V Inverter 300W by NE555,CA3130,MJ15003

Monday, July 23rd, 2007

Circuit DC24V to AC220V Inverter 300W by NE555,CA3130,MJ15003

PCB DC24V to AC220V Inverter 300W by NE555,CA3130,MJ15003
This is circuit Inverter 300, Input battery 24V to Output 220V 50Hz 300W.
Use Component IC 4027,NE555,CA3130,7805 and Transister MJ15003.
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High Current Regulated Supply By LM317 and 2N3055×2

Monday, July 23rd, 2007

The high current regulator below uses an additional winding or a separate transformer to supply power for the LM317 regulator so that the pass transistors can operate closer to saturation and improve efficiency. For good efficiency the voltage at the collectors of the two parallel 2N3055 pass transistors should be close to the output voltage.

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Power Supply Regulator Variable 3 - 24 Volt 3 Amp By LM1458 and 2N3055

Monday, July 23rd, 2007

BY Bill bowden http://ourworld.compuserve.com/homepages/Bill_Bowden/
This regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3 amps or more by selecting a smaller current sense resistor (0.3 ohm). The 2N3055 and 2N3053 transistors should be mounted on suitable heat sinks and the current [...]