of the components shown, minus the
battery, of course.
For those of you that are
marrying your analog circuits to a
computer, you may want to consider
the USB supply shown in Figure 5.
This a true dual polarity supply with
enough muscle to handle large size
analog/digital circuits. The positive part
of the supply simply uses the existing
five volts from the USB port, and the
negative part uses “charge pump”
technology incorporating an eight pin
chip and a few capacitors. This results
in a ± 5 volt supply that will handle
currents up to 100 mA. When
powering op-amps with this supply,
use the old standard +Vcc/-Vcc
hookup. The fuse (as shown) is highly
recommended. I use a 0.5A, FB
instrument type (which I have popped
several times — saving my laptop’s
power supply from damage). Let’s
keep those op-amps happy! NV
The Standard for checking
Good enough to be the
choice of Panasonic,
Pioneer, NBC, ABC, Ford,
JVC, NASA and thousands
of independent service
Locate shorted or leaky
components or conditions
to the exact spot in-circuit
Still cutting up the pcb,
and unsoldering every
part trying to guess at
where the short is?
Your DVM shows the same shorted reading all
along the pcb trace. LeakSeeker 82B has the
resolution to find the defective component.
And with a 60 day trial period, satisfaction Touch pads along the trace, and LeakSeeker
guaranteed or money-back policy, the only beeps highest in pitch at the defect’s pad. Now
thing you can lose is all the time you’re you can locate a shorted part only a quarter of
currently spending on trying to repair all an inch away from a good part. Short can be
those dogs you’ve given up on. from 0 to 150 ohms
CapAnalyzer 88A LeakSeeker 82B
Available at your distributor, or call 561-487-6103
Electronic Design Specialists www.eds-inc.com
Inexpensive enough to pay for itself in just
one day’s repairs. At $209, it’s affordable.
NEW! HIDmaker FS for Full Speed FLASH PIC18F4550
Creates complete PC and Peripheral
programs that talk to each other over
USB. Ready to compile and run!
• Large data Reports
• 64,000 bytes/sec per Interface
• Easily creates devices with multiple
Interfaces, even multiple Identities!
• Automatically does MULTITASKING
• Makes standard or special USB HID
NEW! “Developers Guide for USB HID
Peripherals” shows you how to make
devices for special requirements.
Both PC and Peripheral programs
understand your data items (even odd
sized ones), and give you convenient
variables to handle them.
PIC18F Compilers: PICBASIC Pro,
MPASM, C18, Hi-Tech C.
PIC16C Compilers: PICBASIC Pro,
MPASM, Hi-Tech C, CCS C.
PC Compilers: Delphi, C++ Builder,
Visual Basic 6.
HIDmaker FS Combo: Only $599.95
DOWNLOAD the HIDmaker FS Test Drive today!