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Power supply circuit diagrams
August 4, 2010
A 555 timer can be used to generate a squarewave to produce a negative voltage relative to the negative battery terminal. When the timer output at pin 3 goes positive, the series 22 uF capacitor... [more]
August 4, 2010
All miniature electronic devices operate off batteries. Some of them need higher than the standard battery voltages to operate efficiently. If the battery of that specific voltage is unavailable, we are forced to connect additional... [more]
circuit from:http://www.extremecircuits.net/2010/05/low-power-voltage-doubler-booster.html
August 4, 2010
Sometimes you have a situation where you have a 5-V supply voltage but part of the circuit needs a lower supply voltage. A voltage regulator from the Texas Instruments TPS62000 family [1] is a good... [more]
circuit from:http://www.extremecircuits.net/2010/05/low-voltage-step-down-converter.html
August 4, 2010
In a lot of cases we needed a 220VAC voltage, in spaces where it does not exist, in order to we supply with power, various small appliances. In the Fig.1, exist a voltage converter circuit... [more]
August 4, 2010
Here is a simple but inexpensive inverter for using a small soldering iron (25W, 35W, etc) In the absence of mains supply. It uses eight transistors and a few resistors and capacitors. Transistors Q1 and... [more]
circuit from:http://www.extremecircuits.net/2010/01/inverter-circuit-for-soldering-iron.html
August 4, 2010
Even though today’s electrical appliances are increasingly often self-powered, especially the portable ones you carry around when camping or holidaying in summer, you do still sometimes need a source of 230 V AC - and... [more]
circuit from:http://www.extremecircuits.net/2010/05/cheap-12v-to-220v-inverter.html
August 4, 2010
Here is a 100 Watt inverter circuit using minimum number of components. Here we use CD 4047 IC from Texas Instruments for generating the 100 Hz pulses and four 2N3055 transistors for driving the load.... [more]
circuit from:http://www.extremecircuits.net/2010/01/100w-inverter-circuit-schematic.html
August 4, 2010
This Power Supply is suitable for the Modular Burglar Alarm. However, it has other applications. It is designed to provide an output of 12-volts, with a current of up to 1-amp. In the event of... [more]
August 4, 2010
This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature that you can limit the maximum output current. This is invaluable when (for example) you power-up a... [more]
August 4, 2010
This circuit allows you to set a limit on the maximum output current available from your PSU. It's very useful when you power-up a project for the first time - or carry out a soak-test.... [more]
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