Ham radio power supply circuit with RFI elimination
This is the Ham radio power supply circuit with RFI elimination for Amateur radio. A typically Radio transmitters use High-frequency transistors as current driver so can cause very severe electromagnetic. Therefore, The power supply must be able to make the current higher than 10A. Figure 1 the schematic diagram RFI elimination …
Many the 12V 1A power supplies circuits
Mr jafar need to use the 12 volts 1 amp DC Power Supplies. In my sites has many circuits related them. – Cheap and old but sure, use transistor and zener as main http://www.eleccircuit.com/simple-regulator-by-transistor-c1061/ http://www.eleccircuit.com/dc-power-supply-9-volt-using-tip31-transistor/ – Cheap and popular all times, use IC7812 http://www.eleccircuit.com/regulator-5v6v9v12v-1a-by-ic-7805780678097812/ Note: If you have a 1A …
Constant current circuit using LED
This is Constant current circuit using LED. Normally the voltage drop across LED while forward bias will be about 1.2 to 1.4 volts depend on type of LED by has the temperature coefficient is -1.5 mV per degree Celsius. Which similar to the temperature coefficient of junction. between a base …
Super Steady Zener diode voltage regulator circuit
This circuit is used for controls the voltage battery is steady, which the Zener diode voltage regulator circuit apply very low current about 1mA only, cause there is ripple voltage about 1 mV at voltage changing between 10 to 30 volts. As circuit the output is fixed to 8V. In …
Dual DC power supply rectifier using 2 terminal transformer
There are many ways to build the Dual DC power supply rectifier from a transformer that has one secondary coil.This good way as Figure 1 use two bridge diodes. The first section is normally working, others section (D1-D4) will work by AC signal from C1 and C2. To filter DC …