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22 Threads found on Diode Isolate
Node V_diode_A is shorted to ground by voltage source "Logic1". You may want to use the 2.3k resistor to isolate the voltage source by changing it's position in the circuit. Or preferably use a series choke for RF isolation.
Hi, I'm using some chipset via USB which allows an input voltage between 4 - 20V In order to block 12V from injecting to the 5V power circuit I'm using a diode on the 5V supply. While this works fine with 12V (since the current is low), when I power the chipset with 5V the current is quite high which results that this diode is heating up qui
Yes, you would have to disconnect one end to isolate it from the surrounding circuitry but then you would probably be able to read the whole number on it anyway. Unfortunately for you, that is a standard diode package and there are thousands of different kinds that look the same. Some tests will give clues to it's type if you can't read it but her
MBR0520 is a 0.5 A diode, it may be used, if the average output current is clearly below 0.5 A and rms not much above 0.5 A. Also trace widths won't be good for more than 1 A rms. A GSM module might slightly exceed the diode rating in high speed GPRS operation. I won't thermally isolate the LM2596 ground tab, rather provide additional (...)
What you are doing isn't recommended because it still leaves the other connections intact but the simplest solution is to isolate the power outputs by wiring a Schottky diode in series with each +5V output from the USB socket with the cathode ends joined and used as your new supply output. It will drop the voltage a little but it will prevent the c
I'm trying to add a switch that controls two seat warmers at once. I know I need two diodes to isolate the new circuit so the old switches don't trigger themselves. Anyways here is the problem I'm having. I hooked up a lead to one switch, and when I touch the lead to the chassis ground it's just like I'm pressing the switch, so perfect. BUT w
I have experienced microcontrollers freezing and malfunctioning due to hardware issues, but they were mostly dsPICs. However, the same principles should apply. Make sure the power lines are properly regulated, filtered and decoupled. 'isolate' the reset/master clear pin from the +V line using a diode, and connect a decoupling capacitor and, if ne
2-3V spikes are much larger than normal. "isolate" the input of the regulator from the input voltage with a diode and use a large bulk capacitor. Use a small electrolytic capacitor (10uF to 68uF) from VIN to ground and another from VOUT to ground. Use 0.1uF capacitors from VIN to ground, VOUT to ground and also before the diode to ground. (...)
Looks the wrong way round in the schematic you show. They appear to be PIN diodes used to isolate the receiver when in transmit mode, if the line approaching from the bottom right is the PA supply, D8 will be forward biased across the supply voltage and short it out. Brian.
how about a series resistor and a 4.7v zener diode
Please use P+ and NWell/N+ guard ring to isolate diodes.
The clamping diode can be used to limit the input voltage to the mcu. The other solution is to use either a transistor or even an optocoupler if you want to isolate the mcu from the input voltage. If you use a NPN and the output (going to the mcu) is from the collector then the outpout will be inverted , LOW with positive input and HIGH with no in
Hello, I'm new to this forum and I was wondering if I could get some help on a project. I basically need to make an FSK modulator using discrete components. I've been looking into using the colpitts oscillator and have heard about using a varactor diode to change the capacitance using voltage. The problem I'm having is that I don't know how to i
i am designing a SPDT pin diode based switch in the frequency band of 30-500MHz. i need RF chokes to provide bias to diodes and to isolate RF energy entering into the DC bias. all my ports are 50Ω . so i need minimum impedance of choke is 200Ω. my biasing currents are 100mA. so please suggest me a suitable toroid material.
All you have to take care of is to isolate the two supplies. Else the lower voltage supply will be driven by the higher one. You can make the ground common, and add some circuit (or even a simple schottkey - low drop diode) to switch between the two supplies.
If you need to isolate microcontroller from the car’s ground then an optocoupler is the answer, otherwise you can just use a resistor with a Zener diode .. see this url: Rgds, IanP
If you want to isolate the 2 supply, you can use diode connect in sery with each supply rail.
Since you want to regulate the 11.2V down to 6V anyway, the simplest method is to use diodes to isolate the two batteries. Take two diodes and wire the anode of each diode to the "+" terminal of the batteries. Connect the two cathodes in parallel and use this parallel connection to power the 6V regulator. Which ever (...)
In case of ICSP utilization, dont forgive the following: 1)_ If Your uC is supplyed from different voltage, insert one low voltage rectifier diode for isolate the power supply from ICSP and uC board! 2)_ If You use MCLR (external reset), check the conexion before, like described earlier, insert one low voltage rectifier diode between (...)
I guess it's to form a reversed connected diode and isolate the resistor from other parts of the circuits.