HB25 speed control

jmalaysia

I am considering trying an HB25/12v system to replace what I currently use,· which is a 90vdc system using an off the shelf motor controller.· I just use the BS2 to switch the hi/lo speed controls on it,· which are two 5k pots.· I will need the stamp to read variable pots (or I could convert them to BCD signals) and then convert the reading·to the appropriate pulse width to run the motor at the desired speed.· This will be total redesign of an already working system (for cost reduction),· so I don't want to get too carried away with it before I know it can work.· The HB25 looks pretty simple so I don't really have any questions about that.· I'm just curious about reading resistance with a stamp.·

Zoot

Check the Pbasic manual under RCTIME -- there are examples there for reading a pot -- all you need is the pot, a capacitor, and possibly one or two extra resistors.

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When the going gets weird, the weird turn pro. -- HST

1uffakind.com/robots/povBitMapBuilder.php
1uffakind.com/robots/resistorLadder.php

buffler

I'm currently using two 90V controlllers. I replaced the 5k pot with a resistor, capacitor, and an optoisolator darlington transistor. Then drive the opto diode with a pwm and it works really well. I turn on and reverse each one with a two relay board (about $13.00) as I remember. Works extremely well and totally isolates all the nasty stuff from the stamp.
Don