Fahrenheit Sensor LM34 (CB14400E)

This circuit measures temperatures from +5 to + 300º F using a sensor from National Semiconductor not very easy to obtain.

Volume Limiter (CB13361E)
This circuit is used to output communications receivers that use low-impedance headphones or...
Frequency comparator (CB21609E)
Based on NXP 74HC logic, this circuit can be adapted for various uses. The circuit can also be...
+5 V to -15 V converter (CB1515E)
We find this circuit in an old technical documentation. The circuit can be drawn up with other...