http://www.elecfree.com/electronic/power-supply-regulator-mini-9v-075a-by-transistor/ Wed, 07 Jan 2009 23:41:37 +0000 http://wordpress.org/?v=2.6.5 http://www.elecfree.com/electronic/power-supply-regulator-mini-9v-075a-by-transistor/#comment-671 Mini DC Voltage Regulate 12V to 9V by BD242 and BC549 | Circuit Power Supply Fri, 01 Aug 2008 16:12:59 +0000 http://www.elecfree.com/electronic/power-supply-regulator-mini-9v-075a-by-transistor/#comment-671 [...] A younger brother of me takes an interest to want to try build Mini DC Voltage Regulate 12V to 9V circuit. But he has a condition that want to use old equipment comes to use. I then advise this circuit , because use the transistor number BD242,BC549 and other equipment. Again not ? which think seek easy certainly. By this circuit gives the trend about 1A only. By fine decorate P1 for control volt output , part P2 use for control current output. The detail is other see in the circuit. Source: [...] [...] A younger brother of me takes an interest to want to try build Mini DC Voltage Regulate 12V to 9V circuit. But he has a condition that want to use old equipment comes to use. I then advise this circuit , because use the transistor number BD242,BC549 and other equipment. Again not ? which think seek easy certainly. By this circuit gives the trend about 1A only. By fine decorate P1 for control volt output , part P2 use for control current output. The detail is other see in the circuit. Source: [...]

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