Post Created date
Liquid Level sensor -- type not often discussed
The tire pressure sensors I've used have been surprisingly sensitive. I've been able to measure fractions of an inch with good repeat-ability. I have disassembled some gauges...
Thursday, 17 December 2015 - 19:58
Liquid Level sensor -- type not often discussed
I have used pressure sensors harvested from digital tire pressure gauges. Put them in the top of a sealed tube or pipe and you have a pretty accurate way of measuring water or...
Thursday, 17 December 2015 - 04:27
Looking for schematic - NCR Scale PCB "SCHM 497-0300620"
Another long shot Put a note on their forum and you might get lucky.   Ran across this and it looks like a good resource in general. I know we have...
Sunday, 19 April 2015 - 15:24
Bench magnifier lamp for surface mount soldering - whats best?
I have several magnifying head bands. The one I like most is the Bausch & Lomb. They have several different lenses that may be used. I also have a stereo magnifier for doing...
Monday, 19 January 2015 - 03:06
Circuit Scribe
Pretty sure the pen would be dried up before I got anywhere close to getting my money's worth.   Roger
Friday, 21 November 2014 - 23:31
Are there alternate ways to trigger PIR sensors
Game cameras are usually used for observing wildlife. They can be left unattended for months and have extended battery life. I would be worried about battery life on one of those...
Thursday, 4 September 2014 - 18:47
Inexpensive flow meter
What I've used in the past is a differential pressure switch or transducer across the pump inlet and outlet. Roger
Friday, 6 June 2014 - 16:53
Old MCU and S100 parts
I'd be intrested in the S100 proto boards. Have an 8212s or TMS5501s? PM me Thanks Roger
Wednesday, 9 April 2014 - 02:25
What components would you recommend for this...
I can put documentation together. However I can probably tell you what you need to know here. The LEDs are common anode. Anode to the top of the board. The resistor value is...
Friday, 14 March 2014 - 03:17
What components would you recommend for this...
I believe the LEDs are common anode. The wire is a missing ground. You should have received some documentation with the boards. Roger
Friday, 14 March 2014 - 02:06
What components would you recommend for this...
Great! Will those work for you? Do you need more? Roger
Friday, 14 March 2014 - 01:36
What components would you recommend for this...
OK, I found a board. There is a jumper on the backside (I deleted a trace during an edit) This board used a 74HC540 so a 1 is LED on. or you can use a 74HC541 to invert it, or any...
Friday, 14 March 2014 - 01:14