Hardware tool idea to safely remove chip

Douglas Kryder — Mon, 08 Jul 2019 21:58:06 GMT

@peter-garner-0 i would think that in the process of somehow getting the chip high enough to put this jack under the chip that the chip would then be high enough to easily remove it with the generic extraction tool. however, if you could devise a frame that would support the jack above the chip, or really, basically on top of the chip [for reference the jack would be upside down at this point] with an end clamp to hook under each end of the chip it might work . the jack would be extended at first and in the process of retracting it would pull the chip uniformly. truth be known i suggested this to a room full of techs and an instructor 40 years ago and i suggested somehow clamping the frame to the edges of the pcb and have the jack be on a rail system on x/y axis so it could move to any location as well as the jack be able to freely rotate.and then got high after class and forgot about it. i've never seen one of these gizmos show up anywhere yet so i figured there is something real simple about why the concept won't work and i'm just dumb enough not to see it.

Tool to access hardware PWM

Alexey Avdyukhin — Fri, 21 Jul 2017 23:08:55 GMT

Just created tool to access hawdware PWM on Omega2: https://github.com/ClusterM/omega2-pwm

For some reason Omega2 has not any util to control hardware PWM. There is only fast-gpio tool, it uses software PWM which is awful for sound generation.

Usage

Channel #0 is pin #18, channel #1 is pin #19. Channels #2 and #3 are available on Omega2S only (UART2 pins).

Before usage you must set GPIO muxing using omega2-ctrl tool:

omega2-ctrl gpiomux set pwm0 pwm

omega2-ctrl gpiomux set pwm1 pwm

Then use this tool:

pwm   [duty]

Example to generate 3000Hz on channel #1 with 50% duty:

pwm 1 3000 50

Topics tagged with tool

Hardware tool idea to safely remove chip

Tool to access hardware PWM