circuitfish
New Member
Hi Everyone,
I've built a Schmitt trigger which is connected to a thermistor. Trouble is I want the Schmitt trigger to set off an astable when i heat the thermistor with my fingers but because of the small change in resistance I can't get the astable to be set off without manually turning the variable resistor.
I've tried an LDR and it works fine. Any ideas would be much appreciated.
**broken link removed**
**broken link removed**
I've built a Schmitt trigger which is connected to a thermistor. Trouble is I want the Schmitt trigger to set off an astable when i heat the thermistor with my fingers but because of the small change in resistance I can't get the astable to be set off without manually turning the variable resistor.
I've tried an LDR and it works fine. Any ideas would be much appreciated.
**broken link removed**
**broken link removed**