 | | Re: help about part C3
|
|
use Digikey P6305-ND or P5417-ND. both are 470 uF electrolytics, axial leads (that is, leads sticking out opposite ends) and are 16 mm long and 8 mm in diameter. in other words, they're the right value and they'll fit. F. (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | help about part C3
|
|
Can anyone tell me of a good place to get part C3 for the handy board?...DigiKey no longer has it or a replacement. -Jon Schuck (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Has anyone an icb-routine for 9600b serial connection ?
|
|
Hi, i used the serialio.c routines to establish a data connection between the Handyboard and a Linux PC and encountered the same problems already mentioned in the mailing list: 1) Only char by char transmission with sleeps between transmissions (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Servo DEinitialization.
|
|
Sorry. I'll reread the documentation. I was going by memory. Fred G. Martin Fred G. Martin (...) Ross Tonkens (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Servo DEinitialization.
|
|
(...) as it says in the docs: init_expbd_servos(int action) If action is zero, servo control signals are disabled. If action is non-zero, servo control signals are enabled. Control signals are disabled by default every time the Handy Board is reset. (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Servo DEinitialization.
|
|
I'd go for the Coke can idea. Sounds like a surer shot. I thought init_expbd_servos(x), where x = integer from 0 to 5, was used to initialize the servos individually. Stupid me. I've been using init_expbd_servos(5), and, since I only had #5 hooked (...) (25 years ago, 13-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Expansion Board Servo timing...
|
|
Hi Doc, The function call "init_expbd_servos(0);" turns them off, "init_expbd_servos(1);" turns them on. Something like "servo5=2300;" commands a servo to a position, but only if the servos are initialized as per above. Maybe I used a confusing term (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Desgning H-bridge
|
|
The motor driver circuit is a bipolar push-pull current amplifier. It's really cheap, easy to build and works well with the Tamiya motor/gearbox kits available from (URL) or (URL) I'm sure it has its limitations, but works for small robot projects. (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Expansion Board Servo timing...
|
|
How do you "de-initialize" a sevo? I am only familiar with the init_expbd_servos(x) command and with reassigning the servo(x) global variable to effect servo repositioning. Ross M. Tonkens, M.D. Medical Director Primary Care of Nevada 100 North (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
|
| |
| | Re: Expansion Board Servo timing...
|
|
(...) I don't know about the servo routines on the HB, but servos *do* start to jitter when the pulses get much below about 20Hz. This is not due to the pulse width 'fluctuating', it's because the refresh rate is dropping. It certainly is possible (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
|
