In some applications, one needs a voltage level that is higher than the one immediately available, like in programming EPROMS: a 25V is necessary, but common
digital circuits have only 5V and 12V lines. This converter circuit solves that problem. It converts a DC voltage to a much higher level. To be able to obtain the desired output
level, use Table 5.1 to know the correct value of Rx.
L1 is a small coil with 85 turns of 0.2mm magnet wire around a ferrite core. Its total inductance must be around 100 ÁH.
Parts Placement Layout
Electronic Circuits volume 1.0 - Circuit Nr. 57
The complete data of the electronic circuit described above can be found in the following book and is available from Amazon.com.
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