Comments for The Longhorn Engineer http://longhornengineer.com Robotics, Pinball, Hacking, Portables Tue, 15 May 2012 12:16:28 +0000 hourly 1 http://wordpress.org/?v=3.3.2 Comment on PDS V2.0 Designed by Parkerhttp://longhornengineer.com/2011/11/23/pds-v2-0-designed/#comment-118 Parker Tue, 15 May 2012 12:16:28 +0000 http://longhornengineer.com/?p=738#comment-118 Hey Dave. I will be working on PDS V2.0 after Maker Faire. It will contain an on board ADC and a micro SD card slot. Hey Dave. I will be working on PDS V2.0 after Maker Faire. It will contain an on board ADC and a micro SD card slot.

]]> Comment on PDS V2.0 Designed by David Urbainhttp://longhornengineer.com/2011/11/23/pds-v2-0-designed/#comment-114 David Urbain Sat, 12 May 2012 18:16:16 +0000 http://longhornengineer.com/?p=738#comment-114 Hi Parker,I'm checking back with you on the status of your PDS V2.0 SMT Prop board. I last commented in February of 2012. I was wondering if this board has been tested and could be purchased? I would need sources for all the parts you used that would fit on this board unless you would be packaging them together. I would still be comparing prices with SMT products by other vendors. I like your idea though. Dave... Hi Parker,

I’m checking back with you on the status of your PDS V2.0 SMT Prop board. I last commented in February of 2012. I was wondering if this board has been tested and could be purchased? I would need sources for all the parts you used that would fit on this board unless you would be packaging them together. I would still be comparing prices with SMT products by other vendors.
I like your idea though. Dave…

]]> Comment on LM3S1968: 74HCT595 Shift Registers by Andrew Edgertonhttp://longhornengineer.com/2011/11/08/lm3s1968-74hct595-shift-registers/#comment-109 Andrew Edgerton Thu, 10 May 2012 12:55:32 +0000 http://longhornengineer.com/?p=725#comment-109 I absolutely love the intro to your videos, very well done Parker. Also thanks for posting the code so other can learn from it. I absolutely love the intro to your videos, very well done Parker. Also thanks for posting the code so other can learn from it.

]]> Comment on PID Controller Code by URLhttp://longhornengineer.com/2012/04/09/pid-controller-code/#comment-105 URL Sat, 05 May 2012 18:59:19 +0000 http://longhornengineer.com/?p=777#comment-105 <strong>... [Trackback]...</strong>[...] There you will find 15844 more Infos: longhornengineer.com/2012/04/09/pid-controller-code/ [...]... … [Trackback]…

[...] There you will find 15844 more Infos: longhornengineer.com/2012/04/09/pid-controller-code/ [...]…

]]> Comment on Super Boost PCB by Parkerhttp://longhornengineer.com/2012/04/25/super-boost-pcb/#comment-100 Parker Fri, 27 Apr 2012 23:00:22 +0000 http://longhornengineer.com/?p=860#comment-100 According to the datasheet you do not have to have a separate ground plane for the switcher but it helps. I made sure the feedback and compensation signals where as close as possible to the AGND pin. Because the feedback circuit shares with the switcher ground plane there is a possibility of noise throwing the feedback off. Everything that pertains to the switching is located on a single ground plane which should make the loops fairly small.We will have to see how well it works out :) According to the datasheet you do not have to have a separate ground plane for the switcher but it helps. I made sure the feedback and compensation signals where as close as possible to the AGND pin. Because the feedback circuit shares with the switcher ground plane there is a possibility of noise throwing the feedback off. Everything that pertains to the switching is located on a single ground plane which should make the loops fairly small.

We will have to see how well it works out :)

]]> Comment on Super Boost PCB by Abdullah Kahramanhttp://longhornengineer.com/2012/04/25/super-boost-pcb/#comment-99 Abdullah Kahraman Fri, 27 Apr 2012 22:37:42 +0000 http://longhornengineer.com/?p=860#comment-99 I am sorry if I seem obsessed with the ground planes, however an unbroken solid ground plane is a must for a switcher no make the loop area small. This will help reduce the radiated EMI. If you want to lower the cost by making a single sided PCB, and if you have to pass the EMI test, then you should either re-consider making a single sided or double sided PCB, or design the PCB so that ground return lines are as close as possible to the signal. I am sorry if I seem obsessed with the ground planes, however an unbroken solid ground plane is a must for a switcher no make the loop area small. This will help reduce the radiated EMI. If you want to lower the cost by making a single sided PCB, and if you have to pass the EMI test, then you should either re-consider making a single sided or double sided PCB, or design the PCB so that ground return lines are as close as possible to the signal.

]]> Comment on MSP430 32 LED Driver PCB Done by Abdullah Kahramanhttp://longhornengineer.com/2012/04/10/msp430-32-led-driver-pcb-done/#comment-98 Abdullah Kahraman Fri, 27 Apr 2012 22:32:16 +0000 http://longhornengineer.com/?p=785#comment-98 Ah, couldn't notice that ground plane, that's great if you have them. About the labels, you should put them ALL in one direction so one can read them without turning his/her head. That is my two cents though. Ah, couldn’t notice that ground plane, that’s great if you have them. About the labels, you should put them ALL in one direction so one can read them without turning his/her head. That is my two cents though.

]]> Comment on Propeller: WS2801 – 3 Channel PWM by tableau design modernehttp://longhornengineer.com/2011/07/22/propeller-ws2801-%e2%80%93-3-channel-pwm/#comment-94 tableau design moderne Tue, 24 Apr 2012 10:02:18 +0000 http://longhornengineer.com/?p=472#comment-94 <strong>I bookmark it:)...</strong>[...]check this : http://longhornengineer.com/2011/07/22/propeller-ws2801-–-3-channel-pwm[...]... I bookmark it:)…

[...]check this : http://longhornengineer.com/2011/07/22/propeller-ws2801-–-3-channel-pwm…]…

]]> Comment on MSP430 32 LED Driver PCB Done by Janhttp://longhornengineer.com/2012/04/10/msp430-32-led-driver-pcb-done/#comment-92 Jan Thu, 12 Apr 2012 14:13:34 +0000 http://longhornengineer.com/?p=785#comment-92 The bargraph drivers have usually two modes - a bar and a running dot. Micro is, of course, more flexible.BTW, those chips are from the 70s or so ... The bargraph drivers have usually two modes – a bar and a running dot. Micro is, of course, more flexible.

BTW, those chips are from the 70s or so …

]]> Comment on MSP430 32 LED Driver PCB Done by Parkerhttp://longhornengineer.com/2012/04/10/msp430-32-led-driver-pcb-done/#comment-91 Parker Thu, 12 Apr 2012 13:49:21 +0000 http://longhornengineer.com/?p=785#comment-91 Cool! Never knew that existed. Saving that datasheet for future reference. I wanted microcontroller support so I could run through different light modes (all on, chaser, ect). Probably could easily do this with a small PIC but I already have lots of MSP430 stuff lying around. Cool! Never knew that existed. Saving that datasheet for future reference. I wanted microcontroller support so I could run through different light modes (all on, chaser, ect). Probably could easily do this with a small PIC but I already have lots of MSP430 stuff lying around.

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