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Re: sot23-6 socket

 by lukemalpass ¦  Fri Feb 26, 2010 8:28 am ¦  Forum: SparkFun Product Questions ¦  Topic: sot23-6 socket ¦  Replies: 7 ¦  Views: 1731

Does the PIC not have ICSP?

If not what about making your own spring board that you can press over it while in situe.

 by lukemalpass ¦  Thu Feb 25, 2010 2:13 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Driving 40kHz at 20V from 5V supply ¦  Replies: 40 ¦  Views: 8691

Increased the amplification to 7,500x and guess what?! It works! Here is a scope from about 2 meters away. http://img138.imageshack.us/img138/5521/captureus.png It flashes the LED whenever it detects. I tested and I have a range of just under 6 meters at the long end and I can get the noise down to ...

 by lukemalpass ¦  Wed Feb 24, 2010 2:49 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Driving 40kHz at 20V from 5V supply ¦  Replies: 40 ¦  Views: 8691

Cool, I removed the trace and green wired and the nosie is 99.99% gone. Just a tiny 10mV ripple now which doesn't overly effect the function. Out of interest I took a look back at some of my previous posts and all the boards where I was having the 8Mhz noise, and 52kHz noise etc... were all boards w...

 by lukemalpass ¦  Wed Feb 24, 2010 4:00 am ¦  Forum: SparkFun Product Questions ¦  Topic: Touchscreen reading center when not pressed ¦  Replies: 4 ¦  Views: 503

Checked voltage was 5v, and tried with 9V battery, same results. Will post code when I get home showing how I am reading the values and see if you can spot any issues even though it works fine when powered from ICSP

 by lukemalpass ¦  Tue Feb 23, 2010 1:21 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Driving 40kHz at 20V from 5V supply ¦  Replies: 40 ¦  Views: 8691

I've just had a brain storm! I remember months ago back in the early design stages I kept getting random railing of the amplifier. I finally figured it out and it was because I was running my input copper wire of the amplifier right next to the output line. As soon as I moved this away the problem w...

 by lukemalpass ¦  Tue Feb 23, 2010 1:04 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Driving 40kHz at 20V from 5V supply ¦  Replies: 40 ¦  Views: 8691

Nope I tried altering the clock speed from 4Mhz to 8Mhz and the noise doesn't change frequency. I tried altering every register in the PIC12F615 and all prescalars of the TMR0, T1CON, T2CON, PWM, CCP, and oscillators and nothing at all changes the noise. I've changed the additional functions registe...

 by lukemalpass ¦  Tue Feb 23, 2010 7:13 am ¦  Forum: SparkFun Product Questions ¦  Topic: Touchscreen reading center when not pressed ¦  Replies: 4 ¦  Views: 503

I haven't checked the voltage no presumed if it powered up a 5V LCD and run the same as when using ICSP that the voltage was fine. I will double check. I think (haven't got it with me) I am using a TS78M05 but I will double check it, so no it isn't a LDO. I just stuck a 6V on there to see if it woul...

Touchscreen reading center when not pressed

 by lukemalpass ¦  Tue Feb 23, 2010 1:10 am ¦  Forum: SparkFun Product Questions ¦  Topic: Touchscreen reading center when not pressed ¦  Replies: 4 ¦  Views: 503

I made a test board using a PIC and an LCD screen to basically readout the values of the DS touchscreen. I set X1 and X2 to Gnd and Vdd, and Y2 floating, and Y1 as analogue input, then wait 1ms, then read through ADC, then flip it so Y1 and Y2 are Gnd and Vdd and X2 is floating and X1 is analogue in...

 by lukemalpass ¦  Sun Feb 21, 2010 9:20 am ¦  Forum: SparkFun Product Questions ¦  Topic: Driving 40kHz at 20V from 5V supply ¦  Replies: 40 ¦  Views: 8691

Interesting, I added the transformer, no difference. Add the PIC, no difference. Programming the PIC16F615 with a basic program doing nothing, and the rail to rail was instantly there... very odd. So I erased the PIC and it went away. The noise is coming from the PIC just running. This is very confu...

 by lukemalpass ¦  Sun Feb 21, 2010 3:30 am ¦  Forum: SparkFun Product Questions ¦  Topic: Driving 40kHz at 20V from 5V supply ¦  Replies: 40 ¦  Views: 8691

Just to keep you updated I got around to trying my board again. Removed the transformer and diodes and made no difference, amp was still railing. Rebuild the board identical and put everything on but transformer, and all is good no noise. So I presume the amp was damanged from the third reflow so a ...

 by lukemalpass ¦  Fri Feb 19, 2010 6:36 am ¦  Forum: Wireless/RF ¦  Topic: looking for simplest wireless tech ¦  Replies: 12 ¦  Views: 1281

434 radio transmitter receivers are cheapest and simpliest, just send the pin high on transmitter, and the receiver goes high. Not brilliant for range or sending meaningful data without error handling or encoding but you shouldn't need that.

 by lukemalpass ¦  Fri Feb 19, 2010 1:25 am ¦  Forum: SparkFun Product Questions ¦  Topic: Building a DVR for my homing pigeon....... ¦  Replies: 17 ¦  Views: 1981

Cool idea. One thing noone seems to of mentioned is powering it... I can't imagine anything heavier that a cell battery or 2 being liftable by the pigeon without it thinking "WT...? What's stuck to my toe... I think I stepped in something nasty!". And on that point I can't see it powering a uC, came...

 by lukemalpass ¦  Mon Feb 15, 2010 1:19 am ¦  Forum: Wireless/RF ¦  Topic: Nordic nRF24LE1? ¦  Replies: 24 ¦  Views: 21585

Is the LE basically a nordic 24L01+ with a uC? At the moment I just use the 24L01+ with a PIC, but the LE looks like a cool alternative. However, what is the uC on it and how do you program it? I thought the 8051s were just the old Intel chips from the 80s or are they now more like a generic chip th...

 by lukemalpass ¦  Sat Feb 13, 2010 2:06 am ¦  Forum: SparkFun Product Questions ¦  Topic: Kapton Solder Paste Stencils ¦  Replies: 7 ¦  Views: 8295

Nice work I like the reflows. I have yet to get around to stencils but thats coming up soon so its good to get some hints and tips on it. How do you go about scraping and maintaining the solder as I currently just have a syringe so will need to get a tub and I know they are expensive for small amoun...

 by lukemalpass ¦  Tue Feb 09, 2010 11:21 am ¦  Forum: SparkFun Product Questions ¦  Topic: Parallel 24bit RGB interface? ¦  Replies: 7 ¦  Views: 9350

Right I've read all of that and watched all the webinars and as far as I can gather from the datasheets its an RGB interface and will as such require a controller between the screen and a PIC24F. However, thats where it ends. No more details about what controller or how to use them, set them up or a...