Hack Notes CVA 090609 - Revision history

Mrericboyd: /* Putting in working Shift Register */

2009-06-10T00:57:55Z

Putting in working Shift Register

← Older revision		Revision as of 17:57, 9 June 2009
Line 21:		Line 21:
	NC 10 11 NC		NC 10 11 NC
	</pre>		</pre>

			[[Image:NorthPaw_TPIC_mod.jpg]]

	There are 4 jumpers, and 4 cuts you must make:		There are 4 jumpers, and 4 cuts you must make:

SpammerHellDontDelete: /* Putting in working Shift Register */

2009-06-10T00:33:21Z

Putting in working Shift Register

← Older revision		Revision as of 17:33, 9 June 2009
Line 24:		Line 24:
	There are 4 jumpers, and 4 cuts you must make:		There are 4 jumpers, and 4 cuts you must make:

	Jumpers		*Jumpers
	<pre>		<pre>
	Bridge pin 10 to pin 9, connecting GND		Bridge pin 10 to pin 9, connecting GND
Line 33:		Line 33:
	The other 3 signal pins are all free because of the rotation. The remaining GND pins are internally connected in the TPIC.		The other 3 signal pins are all free because of the rotation. The remaining GND pins are internally connected in the TPIC.

	Cuts		*Cuts

	<pre>Cut leg where Pin 20 is. NOTE ~~this means pin 10 of the TPIC shift register - this is VERY CONFUSING, make sure you cut the right leg! Cutting the leg is way easier than cutting like 4 traces and wiring the necessary bypasses.~~		<pre>
			Cut leg where Pin 20 is[see NOTE]
	Cut trace from Pin 18 (to motor - not strictly necessary)		Cut trace from Pin 18 (to motor - not strictly necessary)
	Cut trace from Pin 1 (to Arduino - otherwise D6 will be GNDed)		Cut trace from Pin 1 (to Arduino - otherwise D6 will be GNDed)
	Cut trace from Pin 13 (to motor - not strictly necessary)		Cut trace from Pin 13 (to motor - not strictly necessary)
	</pre>		</pre>
			NOTE: this means pin 10 of the TPIC shift register - this is VERY CONFUSING, make sure you cut the right leg! Cutting the leg is way easier than cutting like 4 traces and wiring the necessary bypasses.

	Code		*Code

	<pre>		<pre>
Line 54:		Line 56:
	Also, remove the shiftOut12 / new TurnOnMotor code...		Also, remove the shiftOut12 / new TurnOnMotor code...

	Motor Wiring		*Motor Wiring

			There are 14 wires in the 7x2 array. As before, Vcc is on pin 1. The motors are now powered from:
	<pre>		<pre>
	~~There are 14 wires in the 7x2 array. As before, Vcc is on pin 1. The motors are now powered from:~~
	D0 = pin 13		D0 = pin 13
	D1 = pin 12		D1 = pin 12
Line 65:		Line 68:
	D6 = pin 5		D6 = pin 5
	D7 = pin 6		D7 = pin 6
			</pre>
	(so basically, don't put any motors on the middle pins 7, 8, & 9, or on 14. The strange shift is because of skew in the HEF part)		(so basically, don't put any motors on the middle pins 7, 8, & 9, or on 14. The strange shift is because of skew in the HEF part)
	~~</pre>~~

	I have mine working now except for the motor order (need to change the code to match my new armature). So it does work, and other than the desoldering it's actually not too much work.		I have mine working now except for the motor order (need to change the code to match my new armature). So it does work, and other than the desoldering it's actually not too much work.

SpammerHellDontDelete: /* Putting in working Shift Register */

2009-06-10T00:31:36Z

Putting in working Shift Register

← Older revision		Revision as of 17:31, 9 June 2009
Line 9:		Line 9:
	By convention I am using the pin number AS THEY ARE ON THE BOARD, i.e. in the orientation of the original HEF4894B. I've renumbered the pins of the TPIC6B595 (just rotated 180 from the stat sheet):		By convention I am using the pin number AS THEY ARE ON THE BOARD, i.e. in the orientation of the original HEF4894B. I've renumbered the pins of the TPIC6B595 (just rotated 180 from the stat sheet):

			<pre>
	GND 1 20 GND		GND 1 20 GND
	RCK 2 19 nG		RCK 2 19 nG
Line 19:		Line 20:
	GND 9 12 Vcc		GND 9 12 Vcc
	NC 10 11 NC		NC 10 11 NC
			</pre>

	There are 4 jumpers, and 4 cuts you must make:		There are 4 jumpers, and 4 cuts you must make:

	Jumpers		Jumpers
	~~-------~~		<pre>
	Bridge pin 10 to pin 9, connecting GND		Bridge pin 10 to pin 9, connecting GND
	Wire Pin 18 to Arduino 13 (nSRCLK to D7)		Wire Pin 18 to Arduino 13 (nSRCLK to D7)
	Wire Pin 12 to Vcc (which you can get at Pin 20)		Wire Pin 12 to Vcc (which you can get at Pin 20)
	Wire Pin 13 to Arduino 12 (SERIN to D6)		Wire Pin 13 to Arduino 12 (SERIN to D6)
			</pre>
			The other 3 signal pins are all free because of the rotation. The remaining GND pins are internally connected in the TPIC.

	~~The other 3 signal pins are all free because of the rotation. The remaining GND pins are internally connected in the TPIC.~~		Cuts

	~~Cuts~~		<pre>Cut leg where Pin 20 is. NOTE this means pin 10 of the TPIC shift register - this is VERY CONFUSING, make sure you cut the right leg! Cutting the leg is way easier than cutting like 4 traces and wiring the necessary bypasses.
	~~----~~
	Cut leg where Pin 20 is. NOTE this means pin 10 of the TPIC shift register - this is VERY CONFUSING, make sure you cut the right leg! Cutting the leg is way easier than cutting like 4 traces and wiring the necessary bypasses.
	Cut trace from Pin 18 (to motor - not strictly necessary)		Cut trace from Pin 18 (to motor - not strictly necessary)
	Cut trace from Pin 1 (to Arduino - otherwise D6 will be GNDed)		Cut trace from Pin 1 (to Arduino - otherwise D6 will be GNDed)
	Cut trace from Pin 13 (to motor - not strictly necessary)		Cut trace from Pin 13 (to motor - not strictly necessary)
			</pre>

			Code

	~~Code~~		<pre>
	~~----~~
	// define the pins used to run the shift registers		// define the pins used to run the shift registers
	int enable_low = 5;		int enable_low = 5;
Line 46:		Line 50:
	int RCK = 11;		int RCK = 11;
	int SRCK = 4;		int SRCK = 4;
			</pre>

	Also, remove the shiftOut12 / new TurnOnMotor code...		Also, remove the shiftOut12 / new TurnOnMotor code...

	Motor Wiring		Motor Wiring
	~~------------~~		<pre>
	There are 14 wires in the 7x2 array. As before, Vcc is on pin 1. The motors are now powered from:		There are 14 wires in the 7x2 array. As before, Vcc is on pin 1. The motors are now powered from:
	D0 = pin 13		D0 = pin 13
Line 61:		Line 66:
	D7 = pin 6		D7 = pin 6
	(so basically, don't put any motors on the middle pins 7, 8, & 9, or on 14. The strange shift is because of skew in the HEF part)		(so basically, don't put any motors on the middle pins 7, 8, & 9, or on 14. The strange shift is because of skew in the HEF part)
			</pre>

	I have mine working now except for the motor order (need to change the code to match my new armature). So it does work, and other than the desoldering it's actually not too much work.		I have mine working now except for the motor order (need to change the code to match my new armature). So it does work, and other than the desoldering it's actually not too much work.


	==Specing New Shift Register==		==Specing New Shift Register==

SpammerHellDontDelete: New page: =Compass Vibro-Anklet Hacking Session 2009.06.09= ==Putting in working Shift Register== So the HEF shift register doesn't work - not enough juice to power the motors (works fine on LEDs ...

2009-06-10T00:30:07Z

New page: =Compass Vibro-Anklet Hacking Session 2009.06.09= ==Putting in working Shift Register== So the HEF shift register doesn't work - not enough juice to power the motors (works fine on LEDs ...

New page

=Compass Vibro-Anklet Hacking Session 2009.06.09=

==Putting in working Shift Register==

So the HEF shift register doesn't work - not enough juice to power the motors (works fine on LEDs though). So I figured out how to swap in our already-proven TPIC6B595 shift register. Here are the instructions for modding the board, etc:

First: install rotated by 180 degrees. This greatly reduces the number of jumper wires, but does make pin numbering confusing.

By convention I am using the pin number AS THEY ARE ON THE BOARD, i.e. in the orientation of the original HEF4894B. I've renumbered the pins of the TPIC6B595 (just rotated 180 from the stat sheet):

GND 1 20 GND
RCK 2 19 nG
SRCK 3 18 nSRCLK
D4 4 17 D3
D5 5 16 D2
D6 6 15 D1
D7 7 14 D0
SROUT 8 13 SERIN
GND 9 12 Vcc
NC 10 11 NC

There are 4 jumpers, and 4 cuts you must make:

Jumpers
-------
Bridge pin 10 to pin 9, connecting GND
Wire Pin 18 to Arduino 13 (nSRCLK to D7)
Wire Pin 12 to Vcc (which you can get at Pin 20)
Wire Pin 13 to Arduino 12 (SERIN to D6)

The other 3 signal pins are all free because of the rotation. The remaining GND pins are internally connected in the TPIC.

Cuts
----
Cut leg where Pin 20 is. NOTE this means pin 10 of the TPIC shift register - this is VERY CONFUSING, make sure you cut the right leg! Cutting the leg is way easier than cutting like 4 traces and wiring the necessary bypasses.
Cut trace from Pin 18 (to motor - not strictly necessary)
Cut trace from Pin 1 (to Arduino - otherwise D6 will be GNDed)
Cut trace from Pin 13 (to motor - not strictly necessary)

Code
----
// define the pins used to run the shift registers
int enable_low = 5;
int serial_in = 6;
int ser_clear_low = 7;
int RCK = 11;
int SRCK = 4;

Also, remove the shiftOut12 / new TurnOnMotor code...

Motor Wiring
------------
There are 14 wires in the 7x2 array. As before, Vcc is on pin 1. The motors are now powered from:
D0 = pin 13
D1 = pin 12
D2 = pin 11
D3 = pin 10
D4 = pin 3
D5 = pin 4
D6 = pin 5
D7 = pin 6
(so basically, don't put any motors on the middle pins 7, 8, & 9, or on 14. The strange shift is because of skew in the HEF part)

I have mine working now except for the motor order (need to change the code to match my new armature). So it does work, and other than the desoldering it's actually not too much work.

==Specing New Shift Register==

Our new part is: 296-2020-5-ND which is TPIC6C595N (C instead of B).

It's a 16-DIP version of the old shift register. It has slightly less power (100mA/pin, 250mA total versus 150mA/pin, 500mA total), and four less pins (it's missing the two extra GNDs and the two NC pins). The stat sheet doesn't give the cascading circuit, but I am sure we can simply wire the 4 clk/clr signals into both, and send serial out from the first into serial in from the second. So no extra pins from the Arduino. The hard part will be finding room for two 16-DIP parts where the current single 20-DIP part is. We'll also need to expand the motor array, perhaps into two separate 5x2 jacks?

Also, the other potential part is a "dual octal registered transceiver", 296-4031-5-ND, providing 16 64mA pins in a 24-DIP. It's non-stock at digikey, and furthermore I don't trust it. 64mA is barely enough. It would also require all new code to talk to it. If we have super duper trouble with the layout, we can order one of these, bread-board it up, and see if it actually works...

[[Category:Sensebridge]]