The figure shows how to drive a load up to 300 mA with an LM3900. The transistor can be a BD136. We found this setting in the 1994 National Semiconductor Linear Applications Handbook.
This thermometer, which uses common diodes as sensors, was found in a 1975 magazine -...
The time constant of this circuit is 100 x R1 x C1, which leads to the possibility of obtaining times...
This circuit was found in the February 1999 issue of Electronics Now magazine. The circuit...