I want to interface to a variable-speed fan controller using the VM110. Unfortunately the fan controller requires an input that varies from 0-10vDC, while the VM110 analogue outputs vary from 0-5vDC. Is there any easy way of bridging this gap, or am I out of luck?
MarkH
The supply voltage of the K8055 is +5V from the PC. There is no way to increase the analog output of the K8055 to 0-10V.
The solution is to use an external operational amplifier and an external power supply to get the 0-10V output.
[quote=“VEL255”]The supply voltage of the K8055 is +5V from the PC. There is no way to increase the analog output of the K8055 to 0-10V.
The solution is to use an external operational amplifier and an external power supply to get the 0-10V output.[/quote]
Okay, thanks. Perhaps I’ll try plan B, which is a step-up transformer (110vAC/220vAC) on the output from the fan controller 
MarkH
I use my VM110 to switch electric points on my model railway, using an external power block supplying the CLAMP and GND terminals.
I want to use the DAC outputs to control 12vdc motors in model trains. I am not an electronics student, just want an easily implemented solution.
I tried a ‘Sparkfun’ 1A MOSFET but ran into trouble because I ruined it with static. I don’t want a complicated circuit diagram - just something I can use very easily and very quickly. Preferably a readymade module with 2 inputs from the DAC1 or DAC2 and GND for the signal. 2 inputs from a 12vdc 1A power source and 2 outputs to the track which is 2-rail. The ‘Sparkfun’ is cheap and very compact (about the size of a postage stamp) but is complicated by the reversing and stopping arrangements which involve having to supply logic high/low inputs and a 5vdc supply which the K8055 does not have in terminal form.
Has anybody got all this buttoned up and working?
Please see these threads how you can use the PWM output to control the speed of the DC motor:
viewtopic.php?f=15&t=6265
viewtopic.php?f=15&t=1310