Unstable control loop
Interface chips
DIGI 35 CPU A
Power supply investigation
TL084 quad opamp
Shunt resistors
C26 hack
C26 hack
Digi 35 CPU - voltage overshoot
Digi 35 CPU - voltage overshoot
Digi 35 CPU - voltage overshoot
Digi 35 CPU - voltage overshoot
Digi 35 CPU - voltage overshoot
Digi 35 CPU - voltage overshoot
Digi 35 CPU - voltage overshoot
LUFA-based avrispmkII clone - www.bravekit.com
TSOP38238 ready - IR control
TSOP38238 ready - IR control
Not perfectly aligned
Godjira is hungry!
Good quality clip
Bodge wire
What's wrong?
Not impressive
Digi-35-CPU - analog section
Doesn't look like 'just' 10mA to me :-(
WaveAce224_periodic_pulse_trigger_OK_005
WaveAce224_periodic_pulse_trigger_OK_004
WaveAce224_periodic_pulse_trigger_OK_003
WaveAce224_periodic_pulse_trigger_OK_002
WaveAce224_periodic_pulse_trigger_OK_001
WaveAce224_aperiodic_pulse_trigger_NOT-OK_003
WaveAce224_aperiodic_pulse_trigger_NOT-OK_002
WaveAce224_aperiodic_pulse_trigger_NOT-OK_001
bad current regulation
bad current regulation
bad current regulation
bad current regulation
bad current regulation
bad current regulation
Some shrinking tube
New clip
Lecroy probe alligator clip
Lecroy probe ground clip cable
Quite small PIR sensor
See also...
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Testing C26


Traces from top to botton: output voltage, output current (inverted), over-current signal, combined voltage/over-current control signal going to the power transistor drivers.
100nF in parallel with the 4n7 of C26. The over-current control kicks in much later - as expected. The RC time is about 20x larger than before.
100nF in parallel with the 4n7 of C26. The over-current control kicks in much later - as expected. The RC time is about 20x larger than before.
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