Comparator OP Amp using IC AD820, AD539, AD827, AD538 The AD820 is a low power FET op amps can operate from supplies of 5.0 V to 36 V, or dual supplies of 2.5 V to 18 V. AD820 to accommodate input signals below ground in single supply mode. Output voltage swing extends to within 10 […]
Posts tagged power
CIRCUIT DIODE SWITCHED SYNTHESISER
Now I shall introduce my somple diode counter. To start off with, the MC145152-2 A-counter can have a count of 512, 1024, or 2048. This means that a 12.8MHz crystal, divided by 1024, will give you a reference frequency of 12.5kHz. You could alternatively use 6.4MHz divided by 512. Not many options there! You still […]
Making DIRECT PCB PLOTTING
This article is about another method I tried and had 100% success first time. The object is to modify an old plotter pen so that you can draw direct onto the PCB material itself. No photography, just a new pen. All you have to do is the use one of those Faber Castell S overhead […]
