ICM7217 Presettable Up-Down Counter
The ICM7217 is a four digit, presettable up/down counter with an onboard presettable register continuously compared to the counter. The ICM7217 is intended for use in hard-wired applications where thumbwheelRead More
CA3140 and CA3130 Special Opamps
CA3140 and CA3130 are originally RCA part numbers( i feel). They are amazing close to ideal opamps, the input offset has to be trimmed. I used to use it whenRead More
Multiplexed Presettable Timer with ICM7217
This was a attempt to make a Sequential Timer with ICM7217 of Intersil, even though it worked well, it was not developed beyond the prototype stage or first iteration. OnlyRead More
CompuPhase articles and Application notes
CompuPhase Services include contract programming of applications and embedded systems, and also the design and production of custom electronics. CompuPhase Projects and Programmable MP3-player Domains of Expertise Signal processing (audioRead More
BD139 and BD140 Complementary transistor
This pair is my favorite when driving small solenoids or motors. SOT-32 and 12 Watts on Heatsink. This means any small solenoid, relay or DC motor can be controlled withRead More
National Semiconductor – Texas Instrurments
National Semiconductor was an American semiconductor manufacturer, that specialized in analog devices and subsystems, formerly headquartered in Santa Clara, California, USA. The products of National Semiconductor included power management circuits,Read More
Instrumentation and Automation – 01
Here are some Test and measurement notes. These ideas come from practical experience. But the jots are not in any order but are quite important. Scope Notes If the waveformRead More
Test Measurement and Test jigs
Test Tools are needed for Troubleshooting and Repairing Electronic Gadgets, Equipment, Electrical Panels and Machines. Precision Instruments are required for calibration of field and machine control electronics. These are alsoRead More