I'd thought it was a flat unchanging level, I'd not realized this was a reading with a multimeter. Agree, good justification for a 'scope since it seems you're serious about designing stuff : ) I used to use things like a piezo earpiece (or a piezo transducer) as a ...
Use the R × 100 Ω gear of multimeter to measure the forward and reverse resistance between the emitter and the base. The normal values are several hundred ohms to several thousand ohms. if measured resistance is 0 or infinite, the tube under test is damaged. ● Detection Method 3 R...
BT151 SCR Testing with a Multimeter Because the maximum gate-trigger voltage (VGT) is 1.5V so a common multimeter would do the test job neatly, follow these procedures to tell if your SCR is bad. Turn on the multimeter and switch it to the 'diode' mode Refer to the BT151 datasheet t...
To reduce costs, the BPF output signal is proposed to be measured using a low-cost digital multimeter (DMM), off-chip in this work, but that allows an easier integration than the LIA if a complete built-in test approach is required. Figure 1. Circuit under test (CUT) with heterodyne ...