Recent content by magudaman

I built a very small little air compressor that is controlled by a Picaxe 08m2. This compressor is fitted on a car for onboard air. Current the code is setup to check the voltage of the powerline to see if the car is running or not, check the pressure, run the compressor if the compressor is...

So I have a kilowatt counter sends out a logic level at 800 pulse per kilowatt / hour. What I would like to do is setup a picaxe that will on an LCD what the immediate amperage and wattage is. I will assume my voltage doesn't change much for my calculations, so I will not measure. The load...

Ok well I've finally given in and decided to upload my code here and then will be putting the whole project in the completed forum. The project was heavy duty battery discharger that could do upward of 300 amps and or 1300 watts. But first I need to clean up this code and make it more...

I have an output that is usually PWM on my picaxe that has very sensitive circuit on the other end. Currently when my operation stop I just go to zero on the PWM but that still gives me a very small amount of voltage which actually registers and causes problems. Can I just tell the code to...

I have a battery loader I built which is already using a 20m2 to control the discharge and run an LCD with the status. I wanted to add the features to my setup to calculate average voltage, amp hours, and watt hours. In the past I created an amp hour meter by getting my program loops...

I have a AXE133 unit with an OLED. I would like to run my project I have planned at 32mhz but that only supports 4800 baud. So I notice in the AXE133 firmware you can change the baud rate. I have change the baud rate to 4800_16 on the AXE133 and my 20m2 is running at 32mhz n4800_32. I can't...

So I have just started to play with a new 20m2 chip that I am using for a project and just spent the last 2 hours trying to get my AXE133 serial lcd to work. I finally busted out the scope and could clearly see there was a problem with the output on signal. For some reason the square waves are...

So I picked up a couple FET drivers on a whim and really don't quite understand the required components to make a connection. Usually most data sheets have a sample circuit but I must be missing it in this one. TI UCC27423P http://focus.ti.com/lit/ds/symlink/ucc27423.pdf So what I have...

I am looking at FETs to use for a 1000w discharging device I would like to build for battery testing. I plan to bring the FETs into their linear region by filtering the PWM signal into varying dc and regulate from there. What I wanted to know is since I'm not really switch the fets on and off...

So I have a hall current sensor that in debug mode with just a readadc10 command gives a nice steady 512 from my 08m picaxe. As soon as I start running my full fledged code that has one other ADC running and a PWM output that same sensor in the debug mode now reads around 420 about 90% of the...

I have a nominal voltage of around 53v and want to power my picaxe and two leds and an additional 17ma so maybe a total of 45ma. My current linear regulator is good up to 150v which is very awesome for my application but is running so hot it is melting my plastic case (levels out at 95c, good...

Sorry for the belated response, I don't really have the circuit drawn out anywhere but the drawing above shows what matters to this problem. My Hall current sensor is a Tamura L01Z200S05, I attached the datasheet here. I think I am going to just replace my momentary on switch with a momentary...

Ok I hadn't picked this project up in a while and totally had my wiring wrong and it turns out I just ended up shorting the output of the hall current sensor to ground :mad: not to healthy for it :( My cicuit actually looks like this: So my original idea doesn't work for this circuit...

I have used up all my inputs on my 08m and need to add a function that will restart the software. So I have a hall effect current sensor that outputs 2.5v at idle and I want to make that sensor appear to drop to zero according to my picaxe. Can I just put in a switch that shorts the input...