Read e-book online Building military dioramas vol.7 PDF

By Francois Verlinden

Construction army dioramas vol.7 КНИГИ ; ХОББИ и РАЗВЛЕЧЕНИЯ Издательство: Verlinden PublicationsЯзык: АнглийскийОбъём: 38 стр.Формат: PDFРазмер: 6,52 sixty eight

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The circuit works well under most conditions, but enough body capacity must exist between the touch point and circuit ground. The earth side of the power line should be connected to the circuit ground if an ac/dc supply is used. If an isolated or battery supply is used, the touch point might have to be made physically larger and the circuit ground should be an actual metal chassis, not a circuit board or terminal strip. AUDIO SWITCH V1 in Fig. 6-16 acts as a high resistance in the nonconducting state and prevents the audio from being transmitted to n INPUT v1 *t+ +I10pF 5AB-B O lOV Fig.

6-4 can be tried. v1 V2 4 CAPACITY: 2A LAMPS: HPN-27-1 Fig. 5. Power flasher, 3 PPS. Fig. 6-4. Transistor-drive threshold relay. A transistor should be chosen that can furnish the relay operating current and withstand the power supply voltage E,. Low-leakage silicon types would be a good choice for the circuit shown, since the base of Q is not returned to ground. E, can be any value above the rated relay voltage but excessive voltages will increase the amount of power dissipated by Q. A mercury relay is used in the multivibrator circuit of Fig.

REGULATED POWER SUPPLIES The regulated power source in Fig. 7-2 is made from a halfwave voltage doubler, a neon regulator, and a Zener diode. This supply can be used for neon oscillators, timers, ring counters, and other devices that need a stable 160/164 volts. Vacuum-tube regulators operate by changing their internal resistance when the bias is varied. In Fig. 7-3 both circuits use the maintaining voltage of the neon lamp as a reference for one of the control electrodes, while the other control electrode is connected to a point that reflects voltage changes in output.

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Building military dioramas vol.7 by Francois Verlinden

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