High Voltage Supply by 4069 for Low Current Applications

Here is a simple circuit for generating over 100 volts from a 12 volt source for powering low current devices and experiments. The two transistors may be 2N4401 and 2N4403 or similar for lower power applications or higher power devices for heavier loads. If more power is desired then lower the two 10 ohm emitter resistors to 3.3 ohms. When driving power transistors, more drive may be achieved by adding two more gates and resistors in parallel with the two output gates shown. Notice that the two driver gates are simply in parallel with 220 ohm current limit resistors in series with their outputs.

The transformer is an ordinary power transformer but selecting a secondary voltage somewhat below the power supply voltage will give higher output voltage. The frequency is set near 60 Hz by the two 1 Meg. resistors and the 0.01 uF capacitor and this frequency may be varied for driving an audio transformer. The circuit will work well with other power supply voltages but do not exceed the voltage rating of the CMOS gates

Read More source:
http://www.techlib.com/electronics/highvolts.html

This entry was posted on Wednesday, October 31st, 2007 at 10:36 pm and is filed under Power supply, high voltage power supply. You can follow any responses to this entry through the RSS 2.0 feed.