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Hi,
The Opamp NI pin is not left floating. The complete application circuit is given here.
The objective is to DIM the Led Light Intensity by controlling the Led Driver D+ and D- pins.
Here a PWM signal is generated from the uC. That signal is converted into a voltage with reference to...
Hi,
I designed a voltage follower with current sinking circuit. The schematic is attached here
Here there are 2 sources. One is for opamp operation. And the other is 11V@150uA source (say a led dimmer). The objective is to sink the current in the 11v source and bring down the voltage, so that...
Hi,
Am looking for the white caulking paste used in the power supply units to arrest the shock or vibration.
Can any one suggest me the name or specification of the product?
and how to order it?
With Regards,
Mokthar
Hi Barry,
Thanks for your reply.. Some times when the MOV connected parallel to AC line and neutral fails it does not allow any current to the circuit. But once it is replaced the circuit behaves normal.
Rgards,
Mokthar
Hi,
I am using Metal Oxide varistor in parallel with application circuit, with out fuse. If the MOV fails due to aging what happens to my crcuit? Will it pass the current to the circuit or the circuit also gets damaged due to shorting?
Hi Andre,
The circuitry connected with it is attached here. There are 2 circuits one with digital isolator which works fine.
Other is with opto where i have problem in communication.
On both sides i have connected with Tx and Rx pins.
With Regards,
Mokthar
Hi,
Iam trying to isolate uart communication between Metering mcu and RF mcu. I tried with 2 different way.
one i used Analog Digitals Digital Isolator. There is no issue while communicating with that.
Then the other using Optocoupler PC817 it works for first few cycles and there is no...
Yes u r correct. The smps load is balanced. When the phase sense circuit comprising capacitive power supply is used with smps it goes unbalanced.
At this point if my neutral wire is disconnected or goes fault. Some voltage builds across the neutral with return current from capacitive supply...
Hi,
I have Designed a 3phase 4wire smps with neutral. The output of the SMPS is 12v 1Amps. When there is no neutral i want my smps output to go off.
I achieved this by altering the diode bridge rectifier arrangement.
But there is a capacitive power supply that shares the input of 3phase...
yes u r right.. If i connect the load after powering up the SMPS i found no issues. But when it is powered on with the load connected it goes oscillating.
About increasing the capacitor to 10uF, will look into dat.
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