J2r Robot from Jr scientific
I am getting quite excited about this robot that should arrive next Tuesday, It is based on the popular movie robot Johnny five, It is run by a BS2P basic stamp and has three servos, Two continuious rotation for the main drive and one normal servos for the neck tilt which has a ping sonar, LED mouth. It also has a CDs cell and a GD2P12 IR sensor at the front base. It is capable of many accessories such as speech pir and aux sensors.
[center]http://img142.imageshack.us/img142/98/j2rsci1va9.jpg[/center]
[center][size=20] Video [/size][/center]
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[center][size=20] Technical specs here. [/size][/center]
[center][URL]http://ratliff7.tripod.com/products/j2flyer.pdf[/URL][/center]
I received my JR2 the other day and here is a review of it.
First, The assembled J2R M'mmm leaves a bit to be desired, The servos,sensors,batteries,S/S body,wheels and circuit board are pretty good, However the base [.5 mm S/S] is to flexible and distorts, I plan to use 5mm acrylic sheet for the base.The wiring from circuit board to sensors was bad, some of the female plastic plugs were melted from excess heat when soldering, These had to be replaced with parallax female leads cut in half, This left a neat female plug to fit on to the circuit board pins. The mounting of the servos was particularly bad as they were not parallel with the base and needed to be redone. This aside it is a very interesting robot. I have done all the mods needed to make this bot as I would have expected from the designer as an assembled kit. Here are the mods in order that i did them.
Alloy brackets for the servos to be bent to shape.
Alloy brackets for servos bent,drilled and notched for servo leads.
Servos and wheels with brackets.
Servos and wheels different angle.
Brackets mounted to acrylic base with servos.
5mm Acrylic base that replaces the .5mm S/S steel base.
Alloy bracket for battery pack in center.
Mounting studs for BS2 circuit board.
BS2 circuit board in place.
Close up of BS2 circuit board and wiring.
Sharp GD2P12 IR distance sensor.
Alloy bracket for GD2P12 sensor.
Base modifications made,Neck servo and sensors ping sonar,mouth led,CDS sensor and spkr.
Arms and S/S body in the background.
Ping sonar with mouth led mod.
New sonar alloy bracket with servo horn attached,
Another view inside of mount.
Sonar mounted on Alloy bracket and servo horn bolted in place.
J2's eye brows.
J2's eye brows in place.
Two alloy brackets for securing the neck servo, once the servo is in the lower one the top one fits over the lower one.
Neck servo in bracket.
Sonar bracket mounted to neck servo.
Whole assembly now fitted to neck servo.
Neck/head assembly fitted to J2's S/S body and alloy arms fitted.
Side view of J2 reading the BS2 manual.
Here's looking at you.
This is it to date 5th July. I have a small problem at present with the software not loading to the BS2, I have emailed Justin to find out why, and am waiting for a reply.
This is what I have found out so far.
Update 6th July
Ok, I have managed to download your program to my BS2P24/40 demo board ok, So I know that both the serial on Com 1 and my USB to serial on com6 work ok.
These are the results in my stamp editor 2.2.6
Version Loopback Echo
v1.3 Yes Yes
Com1 Basic stamp 2p40 [Stamp recognized]
This also works with USB Com 6
So, Why does it not work with both your BS2 boards??????
It's not the editor or Com ports at fault or leads.
I have also managed to put one of your bs2 stamps in my demo board and download your program ok, verified by the editor as ok, BUT when inserted in your board nothing ,Dead as.
My BS2P24/40 Demo board.
I have loaded Justin's software to this setup and it works fine, However it will not load to his BS2 stamp circuit.
More to follow.
,
Dohh what a dummy, After doing all the tests above and finding out that both BS2's were working ok with my demo board I decided to check with a multimeter [continuity] all of the power track lines to see if there were any breaks, all checked ok. Then I checked the power only to find that I was only getting 3.75v at the CPU VDD side and only 5.75v at the reg, I had assumed that the new batteries supplied [6]= 9v were new or full charge, However they were NOT. Replaced with known good batteries and viola I could now download programs to J2R.
Have now got most things working on J2, Have a bit of tidying up to do then I will make a video. Thanks Justin for a nice robot.
Video