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Hi, Battery: 12V DC, 125Ah. It says 'deep discharge' on the sticker. DC to ~230V AC inverter: It says 1200W/2500W on the sticker. I assume 1200W is for 230V AC and 2500W for 120V AC. Can someone please tell me battery duration with the examples below of what can be powered at 230V AC and for how many hours when the (...)
Greetings Forum, I am looking for a schematic diagram for an HP Pavilion Laptop motherboard. the motherboard part no. designation is: HP Pavilion Dv7 4000 series 630834-001 DAOLX8MB6E1 AMD CPU. While I have the system diagram for the entire laptop downloaded from , I'd like to find a pictorial detailed (...)
Hi the attached (LTspice sim and pdf schem) is two paralleled Buck converters. Please assist us in making out the circuitry required to make these Bucks share current equally between them. the circuitry shown inside dotted lines is what we have so far. However, we need the sharing to (...)
Hi everyone, I'm working on a little DIY lamp project with a capacitive switch. the kit consists of a breadboard with some components, a battery and its charging PCB, and a 20cm-long electric wire that leads to the aluminium foil used as capacitive sensor. the lamp switch on and off randomly when in proximity of things, particularly (...)
Hi, Please assist us in ramping a reference voltage down to zero volts, or back up to the reference voltage. This being done at random times, on demand. the ramp should be over some 200us. It should be linear, but its not too bad if its not that could even be say in 10 steps (up or down). the reference voltage could be any lev
Hi all, what are the main abnormal things that occur in bldc back emf zero cossing detection commutation software (closed loop) sensorless technique? what are the main things to make sure that our development is correct as expected? what are the common failures and causes? can anyone exlain in short? Thanks
Hi, I'd use a PFC stage not only becasue of power factor correction or mains quality. I'd use it because it solves the problem with charging high value capacitors. there are many ready to buy ICs with relatively simple circuits. Timing, inrush current ... can be easily adjusted. Low power loss, low heating. An
I'd also look at Vicor, their isolated bus converters work bidirectionally. they don't say much about it but in the lower right of this they show the 48V<->800V (~1.kW) module being used to step power up and then down for "High-Voltage DC Transmission for Unmanned Vehicles".
I need help with NIMH Button cell battery I want to Trickle charge this battery for 5 years on my smoke detector alarm stand buy current is 40 mA here is my schematic /circuit I use this is my calculation please tell me if I am right on my calculation 10.4 volt /8.4 volt =2 volt/ 1k8 resistor =1.1 mA Please advise me if you can Thanking you in
I developed an algorithm using verilog-hdl in vivado. Now I want to check how long my algorithm will take to process 200 samples without actually dumping it in FPGA kit. So, how to check processing time of a design in vivado software only?
I was recently trying to connect my Delta VFD drive with my laptop using Vfd-Soft software (which I downloaded from Delta website) and RJ 45 to USB converter(RS232/RS485 converter). I connected the variable frequency drive to supply and connected the connecting lead to drive and pc both. I
I have been looking and looking, yet I've found very little detailed information on MIM capacitors. What is the voltage coefficient? What is the temperature coefficient? Best Regards, Mykrolian
Hi guys, I'm trying to build a 2-pole 2-zero compensation for a full bridge dc-dc converter. I'm using sg3525 as IC. To build the compensation network I'm following the instructions on power supply cookbook but there are two resistors which I don't know how to calculate these 2 resistors and the book (...)
157489 I found the shematic here . Here is the esp-wroom-32 data sheet . Questions: In the data sheet they say the operating voltage is 3-3.6 volts.
Hi, I have to calculate amount of total noise which DAC will contribute to the TX chain. Would be enough to take NSD from datasheet and add 10log(bandwidth)? It's not have to be really accurate. What do you think? Thanks in advance Marcin
firstly, make sure the GU10 LED bulbs are truly dimmable. Most already have a switching current regulator in them which will interfere with the drive signal from your circuit. I think it is unlikely you have sufficient base current in the BUX87 to provide reliable switching. Because most of (...)
How to choose optimal wire width of spiral coil to attain high q factor? there are formula to calculate optimal turns n pitch. Is it by trail n error to choose wire width?
hello. i would like to know how to choose correct val;ue of pwm frequency for 3 phase ac motor.
Is there a way we can achieve divide-by-1 clock through D flip-flop or transmit the clock pulse to Q?
Thank you Klaus for your reply. the reason I posted this is to get some help, to discuss if what Im doing is right or not, or if there is a better way, to get opinions and help of other people with much more expertise than me since Im kinda new to this. and yes it took me sometime to know that I should use a relay.