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Building a driver for old tachometer gauges
Hi; I am working my way through the school of hard knocks. My self imposed project for today is to build a driver board for a tachometer gauge that has a coil and three inputs....
Thursday, 26 August 2010 - 03:07
Need some help with this thermocouple project
I have spent many hours on this and it almost works :) The problem I am having I think is the reading and sending of the received bits. The max6675 is being read by a tiny45 16...
Wednesday, 4 August 2010 - 16:51
Bypass Cap when two IC pins are close on board
I am building a machine that i will be using K type thermistors with Max6675 chips and attiny45's The idea is making a board with both chips using a one wire communication scheme...
Thursday, 29 July 2010 - 14:18
Need some help with a bit of code from the TUT's
From the Bit manipulation Tutorial, Peter has the following SBIT.H file. I am just started using CodevisionAVR (trying to move into C from assembler coding. Project would be done...
Wednesday, 21 July 2010 - 06:06
Driving the SLA7078MR Using an atmel chip of course
I have the chip on the breadboard ready to test but I am not clear on the timing diagram in the datasheet (attached SLA7070 page.pdf) To reset the chip the reset goes high for 2us...
Wednesday, 21 October 2009 - 06:04
Programming Challange 5-Phase Stepper
Since I plan on building a CNC machine I remembered I had an old 5-Phase Vexta PK564-AA sitting around and i thought I would give a try to making a controller board. The usual...
Saturday, 19 September 2009 - 05:13
Pin protection or driver chip
I am working on my new acoustic lights that will have a controller that communicates with a tiny45 on each light. Since I will have at most 6 lights and 6 modes I have decided to...
Friday, 16 January 2009 - 18:37
op amp question
My new acoustic light is working great when I use a tlc272ACP op amp but testing a OPA2134PA I had a problem. Using just a 10K resistor for a feedback to the -in with a 2.5V input...
Wednesday, 10 December 2008 - 08:17
Why did my 7805 regulator blow up?
Using a GBU 4A Bridge rectifier 24V AC input 24V DC output to 7805A 5V regulator No capacitor across the 24V output (Note Diode inline with Positive to 7805A Input) 3300 uf...
Saturday, 18 October 2008 - 23:18
Tiny13 with big capacitor startup after powerdown
I am getting close to the end of experimenting with my luxeonIII/Fansink + Boost and Buck converters project using a tiny13 and PWM to run the Buck converter. Since i will be...
Wednesday, 1 October 2008 - 07:38
Buck regulator design
I am putsin with buck regulators now making my own (attached circuit) I am using a p-fet instead of the switch shown in the schematic. The gate of the pfet is connected to a 220...
Tuesday, 23 September 2008 - 15:55
Can i use a Zener when driving a fet?
This fet http://www.fairchildsemi.com/ds/... Shows the Vgs max of 3V the plot shows using a 3V zener on the signal line using a 5V output from avr pin. Is this ok to do or should...
Friday, 19 September 2008 - 07:35

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