- on Computer/Software/Internet
- Published in issue 4/2006 on page 0
RS232 Controlled Switch
If you want to apply computer control to a solenoid valve or another DC load there is no need to start looking for an expensive measurement card. If just one ‘control channel’ is required, a power transistor on the PC interface can do the job equally well and at much lower cost. The example shown here employs the RS232 serial interface.