Yes of course, as Dave said. Simplist is the '595, get 8 outputs from 2 control lines. Ubiquitous in the arduino world... https://www.sparkfun.com/products/13699 On Wed, May 25, 2016 at 3:16 PM, Chris Fala via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
On Wed, May 25, 2016 at 2:56 PM, Dan Roganti via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
On Wed, May 25, 2016 at 1:47 PM, Chris Fala via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
On Wed, May 25, 2016 at 12:58 PM, Dan Roganti via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
On Wed, May 25, 2016 at 12:31 PM, Chris Fala via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
Would this help?
almost, that one has 6 outputs you need one with 10 outputs
Thought the C64 user port only had an 8-bit port. Where are the other two connected? The VIC has a few of the joystick port connected to the user port, but not sure what other outputs you can get out of the C64.
The C64 cartridge board used a cmos 4028, 4bit BCD decoder [Binary Coded Decimal] which has 10 outputs. Even though the interface uses a 4bit binary number, the 4028 only converts the first 10 numbers, 0-9 This in turn drives each motor arranged in a bridge circuit inside the arm. There are 5 motors in the arm = base, shoulder, elbow, wrist, and gripper Each pair of outputs drive one motor The bridge circuit is wired for each motor with a split bipolar power supply using batteries, B+, Gnd, and B- Only one output on the 4028 is allowed to turn on As there is no protection against faulty data switching on both signals and causing a meltdown inside the arm Dan
OK. So only one output can be on at any one time with this setup? Kind of a 74141 without the high voltage?
Funny thing, I Googled 4028 without any other text and the datasheet was the first search result.