Recent content by Jdo300

During typical electrolysis, I understand that the Hydrogen and Oxygen can be separated by isolating the positive and negative plates of the system into separate chambers to capture the gas. But in the case of electrolyzers that create a combined gas output (HHO/hydroxy gas/browns gas, etc.) The...

Actually, that's a really good question. The scope probe I used for the original measurement had a lead length of 1.98 Meters from the end of the cable to the tip of the probe head. Not sure if this directly correlates?

Thanks for the info Tom. Yes, I regularly use these types of test points in my design. I was just wondering if there were any suggestions for high frequency test point measurements with the probe and spring clip combo. At the moment, I'm planning to provision for some SMT pads on the board near...

The distance between the ground of the Rsense resistor and the MOSFET is about 0.8 inches. Thats roughly the length of the MOSFET package + the length of the resistor itself. This is too long for me to stretch or bend the ground probe. However, there is a bypass capacitor GND near the drain so I...

The ground separation question I am still pondering. From looking at the secondary vs, the primary side of the circuit, it actually seems like most of the noise is from the primary side. The noise on the secondary is coming from the diode junction capacitance, but, thankfully, I was able to...

@Tom.G, Thank you for the feedback on the snubber design. I haven't tried capacitors anywhere close to that size. It seemed that when I used any values above about 10 nF, the input current to the circuit started to increase substantially. However, it's good to know how to calculate the values...

Ok, this is a really good question too and one that I've been considering a bit more lately. This boost converter is part of a battery operated HV power supply for charging and discharging a capacitive load through an H-Bridge, and also has an embedded processor and some analog circuitry...

Hi Berkeman, Sorry for my delayed response. Thank you for getting back with me so quickly. Here's my feedback below. This is a great idea! I'll be working with the circuit more today so I'll try it and see if it helps. Yes, we experimented with several different snubber values. Based on the...

Hello Berkeman, Thank you for your response. I have attached a basic schematic of the flyback circuit showing the parameters of the power stage and position of the RCD snubber I've been playing with. The transformer itself was a custom-wound part from Sumida based on a recommended part number...

Hello, I am working on the design of a flyback converter based on the LT3751 capacitor charging circuit. My design is similar to the 42 A cap charger example on pg. 25 of the LT3751 datasheet. In my case, the circuit runs on 12V and steps up the output to 430 V, but I am having some major noise...

Hello, Hi Averagesupernova, Thank you for the input. Yes, I have looked into this. Actually, the probe board is designed to be an addon for microcontrollers that take an analog input (using their internal A/Ds). If the input were to be digital, then I could definitely put the A/D directly on...

Hello All, I'm working on a design for a board that will allow me to plug in a standard 10x scope probe and then reduce and isolate the signal to go into the input of an ADC in a microcontroller (0-5V range) with a max bandwidth of 100 kHz. I have been shopping around for a while looking at...

Thanks kasandranas, When you do, please let me know, I would be very interested to see how you approached the problem. - Jason O

Hello All, Some of you may have heard of the freeware FEA program called FEMM written by David Meeker. It is used to simulate 2D electromagnetic geometries and also has an integrated LUA scripting host which allows script files to be written to automate the process. I'm currently using...

Hello All, I was recently looking into explanations for the operation of Faraday's unipolar generator and came across the following article, titled "The Unipolar Generator, A Demonstration of Special Relativity" published by a professor at the University of Maryland...