Holtek is delighted to announce the release of its new passive infrared body detection IC, the BA76220, which is specifically designed for security...
Articles and news - 4
HOLTEK new BA76220 passive infrared sense IC
Capacitor matchmaker
Precision-matched capacitor pairs are commercially available items, but only in a limited range of values, working voltage, and dielectrics...
Fake contacts, bounced to order
Many recent Design Ideas have involved button-pushing to control power. Some may have been more resistant to contact-bounce than others – but how can we really check that?...
Revisiting µPC1237, a classic audio amplifier
This is just an ultra-quick blog post about a nostalgic IC: µPC1237...
Positive analog feedback linearizes 4 to 20 mA PRTD transmitter
I recently published a simple design for a platinum resistance detector 4 to 20 mA transmitter circuit...
LED driver combines high speed, precision
Applications such as turbidity measurement and densitometry require cleanly pulsed light sources with stable amplitudes. The LED driver illuminates retinal neurons in a biological experiment that has similar requirements...
Driving brushed DC motors
When to use over brushless alternatives...
Signal conditioning for platinum temperature transducers
High accuracy, stability, and wide operating range make platinum RTDs popular temperature transducers. Signal conditioning these devices requires care to utilize their desirable characteristics...
Build automatic transfer switch (ATS) with simple analog electronics
In today’s world, both households and industrial facilities are exploring ways to improve power reliability by harnessing multiple energy sources, not just the electricity from the grid...
Hands-on with hobby-grade arc generator modules
Arc generator modules may be small in scale, but they offer big opportunities for hands-on exploration in electronics...